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Péter Gáspár - One of the best experts on this subject based on the ideXlab platform.
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An Investigation into the Oil Leakage Effect Inside the Electronic Servo-valve for an $$\mathcal{H}_\infty$$H∞/LPV Active Anti-Roll Bar System
International Journal of Control Automation and Systems, 2019Co-Authors: Olivier Sename, Luc Dugard, Péter GáspárAbstract:The Electronic Servo-Valve Hydraulic (ESVH) actuator is commonly used in the industrial sector and engineering practice. This paper investigates the robustness of the $$\mathcal{H}_\infty$$ H ∞ / LPV active Anti-Roll Bar system when the presence of an oil leakage inside the electronic servo-valve is taken into account. We propose a fully integrated model, including four ESVH actuators in a single unit heavy vehicle. Then, an $$\mathcal{H}_\infty$$ H ∞ / LPV controller is synthesized in order to satisfy simultaneously the two main objectives of enhancing roll stability and the saturation of the actuators. Survey results indicate that the oil leakage has a positive effect in protecting the active Anti-Roll Bar system if the controller stops working and it is indispensable for this type system. At each design point of the LPV system, the μ -tool method is used to test the robustness analysis in the frequency domain. It is shown that the active Anti-Roll Bar system is always robust with the maximum uncertain level of the total flow pressure coefficient of 41%, when the forward velocity is considered to be over 130 km/h.
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an investigation into the oil leakage effect inside the electronic servo valve for an mathcal h _ infty h lpv active anti roll Bar system
International Journal of Control Automation and Systems, 2019Co-Authors: Van Tan Vu, Luc Dugard, Olivier Sename, Péter GáspárAbstract:The Electronic Servo-Valve Hydraulic (ESVH) actuator is commonly used in the industrial sector and engineering practice. This paper investigates the robustness of the $$\mathcal{H}_\infty$$ /LPV active Anti-Roll Bar system when the presence of an oil leakage inside the electronic servo-valve is taken into account. We propose a fully integrated model, including four ESVH actuators in a single unit heavy vehicle. Then, an $$\mathcal{H}_\infty$$ /LPV controller is synthesized in order to satisfy simultaneously the two main objectives of enhancing roll stability and the saturation of the actuators. Survey results indicate that the oil leakage has a positive effect in protecting the active Anti-Roll Bar system if the controller stops working and it is indispensable for this type system. At each design point of the LPV system, the μ-tool method is used to test the robustness analysis in the frequency domain. It is shown that the active Anti-Roll Bar system is always robust with the maximum uncertain level of the total flow pressure coefficient of 41%, when the forward velocity is considered to be over 130 km/h.
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An Investigation into the Oil Leakage Effect Inside the Electronic Servo-valve for an $$\mathcal{H}_\infty$$
International Journal of Control Automation and Systems, 2019Co-Authors: Van Tan Vu, Luc Dugard, Olivier Sename, Péter GáspárAbstract:The Electronic Servo-Valve Hydraulic (ESVH) actuator is commonly used in the industrial sector and engineering practice. This paper investigates the robustness of the $$\mathcal{H}_\infty$$ H ∞ / LPV active Anti-Roll Bar system when the presence of an oil leakage inside the electronic servo-valve is taken into account. We propose a fully integrated model, including four ESVH actuators in a single unit heavy vehicle. Then, an $$\mathcal{H}_\infty$$ H ∞ / LPV controller is synthesized in order to satisfy simultaneously the two main objectives of enhancing roll stability and the saturation of the actuators. Survey results indicate that the oil leakage has a positive effect in protecting the active Anti-Roll Bar system if the controller stops working and it is indispensable for this type system. At each design point of the LPV system, the μ -tool method is used to test the robustness analysis in the frequency domain. It is shown that the active Anti-Roll Bar system is always robust with the maximum uncertain level of the total flow pressure coefficient of 41%, when the forward velocity is considered to be over 130 km/h.
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H ∞/LPV controller design for an active Anti-Roll Bar system of heavy vehicles using parameter dependent weighting functions.
Heliyon, 2019Co-Authors: Van Tan Vu, Luc Dugard, Olivier Sename, Péter GáspárAbstract:Abstract Vehicle rollover is a very serious problem when considering the safety of heavy vehicles, which can result in large financial and environmental consequences. This paper investigates the interest of a Linear Parameter Varying (LPV) controller for an active Anti-Roll Bar system of single unit heavy vehicles, in order to enhance roll stability. We propose a parameter dependent H ∞ / L P V controller with weighting functions, scheduled by the forward velocity (the varying parameter of the vehicle LPV model) and by the normalized load transfers at the two axles (part of the parameter dependent weighting functions) providing an on-line performance adaptation to the vehicle rollover risk. The effectiveness of the proposed controller is validated by using the TruckSim® simulation software with two different types of heavy vehicle: a fully loaded bus and a truck. The simulation results, in the frequency and time domains, show that the proposed strategy drastically improves the vehicle roll stability when compared with a H ∞ / L T I controller, a fixed weighting functions H ∞ / L P V controller and a passive Anti-Roll Bar system.
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Performance and robustness assessment of H∞ active Anti-Roll Bar control system by using a software environment
IFAC-PapersOnLine, 2019Co-Authors: Van Tan Vu, Péter GáspárAbstract:Abstract The active Anti-Roll Bar system has been proven to be one of the most effective solutions to improve roll stability of heavy vehicles. In a previous work, the authors proposed an H∞ controller for this system. The Genetic Algorithms method was used to handle the vehicle roll stability and the energy consumption of the actuators via the Pareto optimality. This paper aims to assess the overall effectiveness of the proposed controller with nonlinear heavy vehicle models, which are already set up in the TruckSim® software. The controller is then evaluated in hard conditions to show the high performance and robust with the nonlinearity effects, such as the load distribution between the two axles, the side wind gusts and the abrupt steering. To conduct testing of the H∞ active Anti-Roll Bar control system, we propose a co-simulation structure between TruckSim® and Simulink®: the nonlinear vehicle model is determined from TruckSim®, based on using the block S-function of Simulink. Meanwhile, the controller and the actuators are built directly in the Matlab/Simulink ® environment. The validation results are made through two different types of heavy vehicles: a tour bus and a truck, using a selection of different velocities and scenarios. The results show that by using the H∞ active Anti-Roll Bar control system, in comparison to the passive anti roll Bar system, roll stability is improved to minimise the risk of vehicle rollover.
Olivier Sename - One of the best experts on this subject based on the ideXlab platform.
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An Investigation into the Oil Leakage Effect Inside the Electronic Servo-valve for an $$\mathcal{H}_\infty$$H∞/LPV Active Anti-Roll Bar System
International Journal of Control Automation and Systems, 2019Co-Authors: Olivier Sename, Luc Dugard, Péter GáspárAbstract:The Electronic Servo-Valve Hydraulic (ESVH) actuator is commonly used in the industrial sector and engineering practice. This paper investigates the robustness of the $$\mathcal{H}_\infty$$ H ∞ / LPV active Anti-Roll Bar system when the presence of an oil leakage inside the electronic servo-valve is taken into account. We propose a fully integrated model, including four ESVH actuators in a single unit heavy vehicle. Then, an $$\mathcal{H}_\infty$$ H ∞ / LPV controller is synthesized in order to satisfy simultaneously the two main objectives of enhancing roll stability and the saturation of the actuators. Survey results indicate that the oil leakage has a positive effect in protecting the active Anti-Roll Bar system if the controller stops working and it is indispensable for this type system. At each design point of the LPV system, the μ -tool method is used to test the robustness analysis in the frequency domain. It is shown that the active Anti-Roll Bar system is always robust with the maximum uncertain level of the total flow pressure coefficient of 41%, when the forward velocity is considered to be over 130 km/h.
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an investigation into the oil leakage effect inside the electronic servo valve for an mathcal h _ infty h lpv active anti roll Bar system
International Journal of Control Automation and Systems, 2019Co-Authors: Van Tan Vu, Luc Dugard, Olivier Sename, Péter GáspárAbstract:The Electronic Servo-Valve Hydraulic (ESVH) actuator is commonly used in the industrial sector and engineering practice. This paper investigates the robustness of the $$\mathcal{H}_\infty$$ /LPV active Anti-Roll Bar system when the presence of an oil leakage inside the electronic servo-valve is taken into account. We propose a fully integrated model, including four ESVH actuators in a single unit heavy vehicle. Then, an $$\mathcal{H}_\infty$$ /LPV controller is synthesized in order to satisfy simultaneously the two main objectives of enhancing roll stability and the saturation of the actuators. Survey results indicate that the oil leakage has a positive effect in protecting the active Anti-Roll Bar system if the controller stops working and it is indispensable for this type system. At each design point of the LPV system, the μ-tool method is used to test the robustness analysis in the frequency domain. It is shown that the active Anti-Roll Bar system is always robust with the maximum uncertain level of the total flow pressure coefficient of 41%, when the forward velocity is considered to be over 130 km/h.
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An Investigation into the Oil Leakage Effect Inside the Electronic Servo-valve for an $$\mathcal{H}_\infty$$
International Journal of Control Automation and Systems, 2019Co-Authors: Van Tan Vu, Luc Dugard, Olivier Sename, Péter GáspárAbstract:The Electronic Servo-Valve Hydraulic (ESVH) actuator is commonly used in the industrial sector and engineering practice. This paper investigates the robustness of the $$\mathcal{H}_\infty$$ H ∞ / LPV active Anti-Roll Bar system when the presence of an oil leakage inside the electronic servo-valve is taken into account. We propose a fully integrated model, including four ESVH actuators in a single unit heavy vehicle. Then, an $$\mathcal{H}_\infty$$ H ∞ / LPV controller is synthesized in order to satisfy simultaneously the two main objectives of enhancing roll stability and the saturation of the actuators. Survey results indicate that the oil leakage has a positive effect in protecting the active Anti-Roll Bar system if the controller stops working and it is indispensable for this type system. At each design point of the LPV system, the μ -tool method is used to test the robustness analysis in the frequency domain. It is shown that the active Anti-Roll Bar system is always robust with the maximum uncertain level of the total flow pressure coefficient of 41%, when the forward velocity is considered to be over 130 km/h.
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H ∞/LPV controller design for an active Anti-Roll Bar system of heavy vehicles using parameter dependent weighting functions.
Heliyon, 2019Co-Authors: Van Tan Vu, Luc Dugard, Olivier Sename, Péter GáspárAbstract:Abstract Vehicle rollover is a very serious problem when considering the safety of heavy vehicles, which can result in large financial and environmental consequences. This paper investigates the interest of a Linear Parameter Varying (LPV) controller for an active Anti-Roll Bar system of single unit heavy vehicles, in order to enhance roll stability. We propose a parameter dependent H ∞ / L P V controller with weighting functions, scheduled by the forward velocity (the varying parameter of the vehicle LPV model) and by the normalized load transfers at the two axles (part of the parameter dependent weighting functions) providing an on-line performance adaptation to the vehicle rollover risk. The effectiveness of the proposed controller is validated by using the TruckSim® simulation software with two different types of heavy vehicle: a fully loaded bus and a truck. The simulation results, in the frequency and time domains, show that the proposed strategy drastically improves the vehicle roll stability when compared with a H ∞ / L T I controller, a fixed weighting functions H ∞ / L P V controller and a passive Anti-Roll Bar system.
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An investigation into the oil leakage effect inside the electronic servo-valve for an H ∞ /LPV active Anti-Roll Bar system
International Journal of Control Automation and Systems, 2019Co-Authors: Van Tan Vu, Luc Dugard, Olivier Sename, Péter GáspárAbstract:The Electronic Servo-Valve Hydraulic (ESVH) actuator is commonly used in the industrial sector and engineering practice. This paper investigates the robustness of the H ∞ /LPV active Anti-Roll Bar system when the presence of an oil leakage inside the electronic servo-valve is taken into account. We propose a fully integrated model, including four ESVH actuators in a single unit heavy vehicle. Then, an H ∞ /LPV controller is synthesized in order to satisfy simultaneously the two main objectives of enhancing roll stability and the saturation of the actuators. Survey results indicate that the oil leakage has a positive effect in protecting the active Anti-Roll Bar system if the controller stops working and it is indispensable for this system. At each design point of the LPV system, the µ-tool method is used to test the robustness analysis in the frequency domain. It is shown that the active Anti-Roll Bar system is always robust with the maximum uncertain level of the total flow pressure coefficient being 41%, when the forward velocity is considered to be over 130 km/h.
Luc Dugard - One of the best experts on this subject based on the ideXlab platform.
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an investigation into the oil leakage effect inside the electronic servo valve for an mathcal h _ infty h lpv active anti roll Bar system
International Journal of Control Automation and Systems, 2019Co-Authors: Van Tan Vu, Luc Dugard, Olivier Sename, Péter GáspárAbstract:The Electronic Servo-Valve Hydraulic (ESVH) actuator is commonly used in the industrial sector and engineering practice. This paper investigates the robustness of the $$\mathcal{H}_\infty$$ /LPV active Anti-Roll Bar system when the presence of an oil leakage inside the electronic servo-valve is taken into account. We propose a fully integrated model, including four ESVH actuators in a single unit heavy vehicle. Then, an $$\mathcal{H}_\infty$$ /LPV controller is synthesized in order to satisfy simultaneously the two main objectives of enhancing roll stability and the saturation of the actuators. Survey results indicate that the oil leakage has a positive effect in protecting the active Anti-Roll Bar system if the controller stops working and it is indispensable for this type system. At each design point of the LPV system, the μ-tool method is used to test the robustness analysis in the frequency domain. It is shown that the active Anti-Roll Bar system is always robust with the maximum uncertain level of the total flow pressure coefficient of 41%, when the forward velocity is considered to be over 130 km/h.
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An Investigation into the Oil Leakage Effect Inside the Electronic Servo-valve for an $$\mathcal{H}_\infty$$H∞/LPV Active Anti-Roll Bar System
International Journal of Control Automation and Systems, 2019Co-Authors: Olivier Sename, Luc Dugard, Péter GáspárAbstract:The Electronic Servo-Valve Hydraulic (ESVH) actuator is commonly used in the industrial sector and engineering practice. This paper investigates the robustness of the $$\mathcal{H}_\infty$$ H ∞ / LPV active Anti-Roll Bar system when the presence of an oil leakage inside the electronic servo-valve is taken into account. We propose a fully integrated model, including four ESVH actuators in a single unit heavy vehicle. Then, an $$\mathcal{H}_\infty$$ H ∞ / LPV controller is synthesized in order to satisfy simultaneously the two main objectives of enhancing roll stability and the saturation of the actuators. Survey results indicate that the oil leakage has a positive effect in protecting the active Anti-Roll Bar system if the controller stops working and it is indispensable for this type system. At each design point of the LPV system, the μ -tool method is used to test the robustness analysis in the frequency domain. It is shown that the active Anti-Roll Bar system is always robust with the maximum uncertain level of the total flow pressure coefficient of 41%, when the forward velocity is considered to be over 130 km/h.
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An Investigation into the Oil Leakage Effect Inside the Electronic Servo-valve for an $$\mathcal{H}_\infty$$
International Journal of Control Automation and Systems, 2019Co-Authors: Van Tan Vu, Luc Dugard, Olivier Sename, Péter GáspárAbstract:The Electronic Servo-Valve Hydraulic (ESVH) actuator is commonly used in the industrial sector and engineering practice. This paper investigates the robustness of the $$\mathcal{H}_\infty$$ H ∞ / LPV active Anti-Roll Bar system when the presence of an oil leakage inside the electronic servo-valve is taken into account. We propose a fully integrated model, including four ESVH actuators in a single unit heavy vehicle. Then, an $$\mathcal{H}_\infty$$ H ∞ / LPV controller is synthesized in order to satisfy simultaneously the two main objectives of enhancing roll stability and the saturation of the actuators. Survey results indicate that the oil leakage has a positive effect in protecting the active Anti-Roll Bar system if the controller stops working and it is indispensable for this type system. At each design point of the LPV system, the μ -tool method is used to test the robustness analysis in the frequency domain. It is shown that the active Anti-Roll Bar system is always robust with the maximum uncertain level of the total flow pressure coefficient of 41%, when the forward velocity is considered to be over 130 km/h.
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H ∞/LPV controller design for an active Anti-Roll Bar system of heavy vehicles using parameter dependent weighting functions.
Heliyon, 2019Co-Authors: Van Tan Vu, Luc Dugard, Olivier Sename, Péter GáspárAbstract:Abstract Vehicle rollover is a very serious problem when considering the safety of heavy vehicles, which can result in large financial and environmental consequences. This paper investigates the interest of a Linear Parameter Varying (LPV) controller for an active Anti-Roll Bar system of single unit heavy vehicles, in order to enhance roll stability. We propose a parameter dependent H ∞ / L P V controller with weighting functions, scheduled by the forward velocity (the varying parameter of the vehicle LPV model) and by the normalized load transfers at the two axles (part of the parameter dependent weighting functions) providing an on-line performance adaptation to the vehicle rollover risk. The effectiveness of the proposed controller is validated by using the TruckSim® simulation software with two different types of heavy vehicle: a fully loaded bus and a truck. The simulation results, in the frequency and time domains, show that the proposed strategy drastically improves the vehicle roll stability when compared with a H ∞ / L T I controller, a fixed weighting functions H ∞ / L P V controller and a passive Anti-Roll Bar system.
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An investigation into the oil leakage effect inside the electronic servo-valve for an H ∞ /LPV active Anti-Roll Bar system
International Journal of Control Automation and Systems, 2019Co-Authors: Van Tan Vu, Luc Dugard, Olivier Sename, Péter GáspárAbstract:The Electronic Servo-Valve Hydraulic (ESVH) actuator is commonly used in the industrial sector and engineering practice. This paper investigates the robustness of the H ∞ /LPV active Anti-Roll Bar system when the presence of an oil leakage inside the electronic servo-valve is taken into account. We propose a fully integrated model, including four ESVH actuators in a single unit heavy vehicle. Then, an H ∞ /LPV controller is synthesized in order to satisfy simultaneously the two main objectives of enhancing roll stability and the saturation of the actuators. Survey results indicate that the oil leakage has a positive effect in protecting the active Anti-Roll Bar system if the controller stops working and it is indispensable for this system. At each design point of the LPV system, the µ-tool method is used to test the robustness analysis in the frequency domain. It is shown that the active Anti-Roll Bar system is always robust with the maximum uncertain level of the total flow pressure coefficient being 41%, when the forward velocity is considered to be over 130 km/h.
Van Tan Vu - One of the best experts on this subject based on the ideXlab platform.
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Studying an Active Anti-Roll Bar Control System for Tractor-Semi Trailer Vehicles
Advances in Engineering Research and Application, 2020Co-Authors: Van Tan Vu, Duc Tien BuiAbstract:Today, articulated vehicles are widely used in the world because they benefit the society. However, accidents related to articulated vehicles tend to be fatal, one of the main reasons is the instability of articulated vehicles. This paper is concerned with the dynamic modeling of tractor–semi trailer vehicles. A simplified linear model is proposed, which includes the roll and yaw motions, based on the assumption that the longitudinal velocity is constant. The simulation results in a cornering and a double lane change manoeuver show that the stability of tractor-semi trailer depends on the stiffness and damping coefficients and the forward velocity. Therefore, in order to improve the vehicle roll stability, three types of active Anti-Roll Bar system for the tractor-semi trailer are proposed: the first and second systems are equipped only for tractor and trailer respectively, while the last one can be used for both kinds of vehicles.
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an investigation into the oil leakage effect inside the electronic servo valve for an mathcal h _ infty h lpv active anti roll Bar system
International Journal of Control Automation and Systems, 2019Co-Authors: Van Tan Vu, Luc Dugard, Olivier Sename, Péter GáspárAbstract:The Electronic Servo-Valve Hydraulic (ESVH) actuator is commonly used in the industrial sector and engineering practice. This paper investigates the robustness of the $$\mathcal{H}_\infty$$ /LPV active Anti-Roll Bar system when the presence of an oil leakage inside the electronic servo-valve is taken into account. We propose a fully integrated model, including four ESVH actuators in a single unit heavy vehicle. Then, an $$\mathcal{H}_\infty$$ /LPV controller is synthesized in order to satisfy simultaneously the two main objectives of enhancing roll stability and the saturation of the actuators. Survey results indicate that the oil leakage has a positive effect in protecting the active Anti-Roll Bar system if the controller stops working and it is indispensable for this type system. At each design point of the LPV system, the μ-tool method is used to test the robustness analysis in the frequency domain. It is shown that the active Anti-Roll Bar system is always robust with the maximum uncertain level of the total flow pressure coefficient of 41%, when the forward velocity is considered to be over 130 km/h.
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An Investigation into the Oil Leakage Effect Inside the Electronic Servo-valve for an $$\mathcal{H}_\infty$$
International Journal of Control Automation and Systems, 2019Co-Authors: Van Tan Vu, Luc Dugard, Olivier Sename, Péter GáspárAbstract:The Electronic Servo-Valve Hydraulic (ESVH) actuator is commonly used in the industrial sector and engineering practice. This paper investigates the robustness of the $$\mathcal{H}_\infty$$ H ∞ / LPV active Anti-Roll Bar system when the presence of an oil leakage inside the electronic servo-valve is taken into account. We propose a fully integrated model, including four ESVH actuators in a single unit heavy vehicle. Then, an $$\mathcal{H}_\infty$$ H ∞ / LPV controller is synthesized in order to satisfy simultaneously the two main objectives of enhancing roll stability and the saturation of the actuators. Survey results indicate that the oil leakage has a positive effect in protecting the active Anti-Roll Bar system if the controller stops working and it is indispensable for this type system. At each design point of the LPV system, the μ -tool method is used to test the robustness analysis in the frequency domain. It is shown that the active Anti-Roll Bar system is always robust with the maximum uncertain level of the total flow pressure coefficient of 41%, when the forward velocity is considered to be over 130 km/h.
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An investigation into the oil leakage effect inside the electronic servo-valve for an H ∞ /LPV active Anti-Roll Bar system
International Journal of Control Automation and Systems, 2019Co-Authors: Van Tan Vu, Luc Dugard, Olivier Sename, Péter GáspárAbstract:The Electronic Servo-Valve Hydraulic (ESVH) actuator is commonly used in the industrial sector and engineering practice. This paper investigates the robustness of the H ∞ /LPV active Anti-Roll Bar system when the presence of an oil leakage inside the electronic servo-valve is taken into account. We propose a fully integrated model, including four ESVH actuators in a single unit heavy vehicle. Then, an H ∞ /LPV controller is synthesized in order to satisfy simultaneously the two main objectives of enhancing roll stability and the saturation of the actuators. Survey results indicate that the oil leakage has a positive effect in protecting the active Anti-Roll Bar system if the controller stops working and it is indispensable for this system. At each design point of the LPV system, the µ-tool method is used to test the robustness analysis in the frequency domain. It is shown that the active Anti-Roll Bar system is always robust with the maximum uncertain level of the total flow pressure coefficient being 41%, when the forward velocity is considered to be over 130 km/h.
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Active Anti-Roll Bar control using electronic servo valve hydraulic damper on single unit heavy vehicle
IFAC-PapersOnLine, 2016Co-Authors: Van Tan Vu, Luc Dugard, Olivier Sename, Péter GáspárAbstract:Rollover is a very serious problem for heavy vehicle safety, which can result in large financial and environmental consequences. In order to improve roll stability, most of modern heavy vehicles are equipped with passive Anti-Roll Bars to reduce roll motion during cornering or riding on uneven roads. This paper introduces the active Anti-Roll Bars designed by finding an optimal control based on a linear quadratic regulator (LQR). Four electronic servo-valve hydraulic dampers are modelled and applied on a yaw-roll model of a single unit heavy vehicle. The control signal is the current entering the electronic servo-valve and the output of this actuator is the damping force generated by the hydraulic damper. Simulation results are obtained and compared in three different situations: without Anti-Roll Bars, with passive Anti-Roll Bars and with active Anti-Roll Bars. It is shown that the use of two active (front and rear) Anti-Roll Bars drastically improves the behaviour of the single unit heavy vehicle.
Van Tan Vu - One of the best experts on this subject based on the ideXlab platform.
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H ∞/LPV controller design for an active Anti-Roll Bar system of heavy vehicles using parameter dependent weighting functions.
Heliyon, 2019Co-Authors: Van Tan Vu, Luc Dugard, Olivier Sename, Péter GáspárAbstract:Abstract Vehicle rollover is a very serious problem when considering the safety of heavy vehicles, which can result in large financial and environmental consequences. This paper investigates the interest of a Linear Parameter Varying (LPV) controller for an active Anti-Roll Bar system of single unit heavy vehicles, in order to enhance roll stability. We propose a parameter dependent H ∞ / L P V controller with weighting functions, scheduled by the forward velocity (the varying parameter of the vehicle LPV model) and by the normalized load transfers at the two axles (part of the parameter dependent weighting functions) providing an on-line performance adaptation to the vehicle rollover risk. The effectiveness of the proposed controller is validated by using the TruckSim® simulation software with two different types of heavy vehicle: a fully loaded bus and a truck. The simulation results, in the frequency and time domains, show that the proposed strategy drastically improves the vehicle roll stability when compared with a H ∞ / L T I controller, a fixed weighting functions H ∞ / L P V controller and a passive Anti-Roll Bar system.
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Performance and robustness assessment of H∞ active Anti-Roll Bar control system by using a software environment
IFAC-PapersOnLine, 2019Co-Authors: Van Tan Vu, Péter GáspárAbstract:Abstract The active Anti-Roll Bar system has been proven to be one of the most effective solutions to improve roll stability of heavy vehicles. In a previous work, the authors proposed an H∞ controller for this system. The Genetic Algorithms method was used to handle the vehicle roll stability and the energy consumption of the actuators via the Pareto optimality. This paper aims to assess the overall effectiveness of the proposed controller with nonlinear heavy vehicle models, which are already set up in the TruckSim® software. The controller is then evaluated in hard conditions to show the high performance and robust with the nonlinearity effects, such as the load distribution between the two axles, the side wind gusts and the abrupt steering. To conduct testing of the H∞ active Anti-Roll Bar control system, we propose a co-simulation structure between TruckSim® and Simulink®: the nonlinear vehicle model is determined from TruckSim®, based on using the block S-function of Simulink. Meanwhile, the controller and the actuators are built directly in the Matlab/Simulink ® environment. The validation results are made through two different types of heavy vehicles: a tour bus and a truck, using a selection of different velocities and scenarios. The results show that by using the H∞ active Anti-Roll Bar control system, in comparison to the passive anti roll Bar system, roll stability is improved to minimise the risk of vehicle rollover.
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Improving Vehicle Roll Stability by LQR Active Anti-Roll Bar Control
Advances in Engineering Research and Application, 2018Co-Authors: Van Tan Vu, Olivier Sename, Duc Tien BuiAbstract:Today there are over 1.3 billion vehicles in use all over the world and vehicle rollover is a serious safety problem, which can result in large financial and environmental consequences. In order to improve the roll stability, most modern vehicles are equipped with the passive Anti-Roll Bar system to reduce roll motion during cornering or riding on uneven roads. However, the passive Anti-Roll Bar does not meet the required stability when the vehicle is in an emergency. This paper introduces the active Anti-Roll Bar control which is designed by finding an optimal control, based on a Linear Quadratic Regulator (LQR). A four-degree-of-freedom half roll model that captures the essential vehicle dynamics associated with rollover phenomenon is presented. The obtained results of comparison of performance between a passive and an LQR active Anti-Roll Bar show the significant effectiveness of the active Anti-Roll Bar control in various maneuver situations.
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H ∞ /LPV control for an active Anti-Roll Bar system to improve the roll stability of heavy vehicles
2017Co-Authors: Van Tan Vu, Luc Dugard, Olivier Sename, Van Phong Dinh, Thanh-phong PhamAbstract:Rollover accidents of heavy vehicles are especially dangerous and cause greater damage and injury than other accidents. The relatively low roll stability of heavy vehicles is the main cause of rollover and contributes to the total number of vehicle accidents. Most modern heavy vehicles are equipped with passive Anti-Roll Bars, in order to enhance the roll stability. However, during cornering maneuvers, the passive Anti-Roll Bar transfers the vertical forces of one side of the suspension to the other one, creating therefore a moment against the lateral force, so there may not be sufficient stability to overcome critical situations. This paper is focussed on the H ∞ /LPV active Anti-Roll Bar control for single unit heavy vehicles. A Linear Parameter Varying (LPV) approach is proposed here in order to schedule the controller with the vehicle forward velocity as the varying parameter. The grid-based LPV approach is used to synthesize the H ∞ /LPV controller through LPVTools TM. The simulation results, both in the frequency and time domains, show that the H ∞ /LPV active Anti-Roll Bar can improve the roll stability of the vehicle by 30%, when compared with the passive Anti-Roll Bars.
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Enhancing the roll stability of heavy vehicles by using an active Anti-Roll Bar system
2017Co-Authors: Van Tan VuAbstract:Vehicle rollover is a very serious problem for the safety of heavy vehicles. Most modern heavy vehicles are equipped with passive Anti-Roll Bars, however they may be not sufficient to overcome critical situations. This thesis focuses on the active Anti-Roll Bar system, which is the most common method used to improve roll stability of heavy vehicles.The thesis research work is divided into three main parts. In the first part, an integrated model is proposed with four electronic servo-valve hydraulic actuators mounted in a linear yaw-roll model of a single unit heavy vehicle. In the second part, the active Anti-Roll Bar system uses two control approaches in the LTI framework: LQR, Hinfty. In the third part, the grid-based LPV approach is used to synthesize the Hinfty/LPV active Anti-Roll Bar controller with parameter dependant weighting functions, by using LPVTools.The simulation results, in the frequency and time domains, as well as the validation by using the TruckSim simulation software, show that the active Anti-Roll Bar control is a realistic and efficient solution which drastically improves roll stability of a single unit heavy vehicle, compared to the passive Anti-Roll Bar.