The Experts below are selected from a list of 20493 Experts worldwide ranked by ideXlab platform
Shaoping Wang - One of the best experts on this subject based on the ideXlab platform.
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Trajectory based motion synchronization in a dissimilar redundant Actuation System for a large civil aircraft
2017 29th Chinese Control And Decision Conference (CCDC), 2017Co-Authors: Waheed Ur Rehman, Xingjian Wang, Shaoping Wang, Haq Nawaz, Muhammad Nadeem Iqbal, Mansoor Ali Zaheer, Irfan Azhar, Hassan ElahiAbstract:With the passage of time, the aircraft industry is moving towards more electric aircraft. This creates an opportunity to introduce dissimilar redundant Actuation System in the primary flight control System. The problem arises, such as a force fighting (force difference between the outputs of actuators) in using dissimilar redundant Actuation System. This paper presents a strategy to reduce force fighting for redundant Actuation System of hydraulic actuator (HA) and electro hydrostatic actuator (EHA). A trajectory is designed on the basis of dynamic characteristics of the EHA. The feedback controller is used to improve load rejection performance and the two feed forward controllers to remove the initial force fighting between HA and EHA.
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Active fault-tolerant control of dissimilar redundant Actuation System based on performance degradation reference models
Journal of the Franklin Institute, 2017Co-Authors: Cun Shi, Jun Wang, Xingjian Wang, Shaoping Wang, Mileta M. TomovicAbstract:Dissimilar redundant Actuation System (DRAS) composed of one hydraulic actuator (HA) and one electro-hydrostatic actuator (EHA) represents industry trend in Actuation System towards more electric aircraft (MEA). The paper investigates performance degradation of DRAS under the System malfunctions and addresses the problem of active switching of DRAS from HA to EHA to ensure the reliable Actuation and efficient control. A novel active fault-tolerant controller (AFTC) based on the performance degradation reference models (PDRM) is presented. The main performance degradation rules of DRAS are determined based on the effect of fault degree on the System root locus and the proposed PDRM are then constructed as a series of second-order functions. Finally, an intelligent matching algorithm (MA) is developed based on the dominant closed-loop poles, and a set of adaptive fuzzy controllers (AFC) are designed based on the proposed PDRM and the intelligent MA to achieve the performance degraded fault-tolerant capability. Extensive simulation results are presented to indicate the effectiveness of the proposed AFTC control scheme.
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A multi-fault diagnosis strategy of electro-hydraulic servo Actuation System based on extended Kalman filter
2017 IEEE International Conference on Cybernetics and Intelligent Systems (CIS) and IEEE Conference on Robotics Automation and Mechatronics (RAM), 2017Co-Authors: Xingjian Wang, Shaoping Wang, Chao ZhangAbstract:Electro-hydraulic servo Actuation System is a mechanical, electrical and hydraulic mixing complex System. If it can't be repaired for a long time, it is necessary to consider the possibility of occurrence of multiple faults. Considering this possibility, this paper presents an extended Kalman filter (EKF) based method for multiple faults diagnosis. Through analysing the failure modes and mechanism of the electro-hydraulic servo Actuation System and modelling selected typical failure modes, the relationship between the key parameters of the System and the faults is obtained. The extended Kalman filter which is a commonly used algorithm for estimating parameters is used to on-line fault diagnosis. Then use the extended Kalman filter to diagnose potential faults. The simulation results show that the multi-fault diagnosis method based on extended Kalman filter is effective for multi-fault diagnosis of electro-hydraulic servo Actuation System.
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Modeling of reliability and performance assessment of a dissimilar redundancy Actuation System with failure monitoring
Chinese Journal of Aeronautics, 2016Co-Authors: Shaoping Wang, Jian Shi, Xiaoyu Cui, Mileta M. Tomovic, Zongxia JiaoAbstract:Actuation System is a vital System in an aircraft, providing the force necessary to move flight control surfaces. The System has a significant influence on the overall aircraft performance and its safety. In order to further increase already high reliability and safety, Airbus has implemented a dissimilar redundancy Actuation System (DRAS) in its aircraft. The DRAS consists of a hydraulic Actuation System (HAS) and an electro-hydrostatic Actuation System (EHAS), in which the HAS utilizes a hydraulic source (HS) to move the control surface and the EHAS utilizes an electrical supply (ES) to provide the motion force. This paper focuses on the performance degradation processes and fault monitoring strategies of the DRAS, establishes its reliability model based on the generalized stochastic Petri nets (GSPN), and carries out a reliability assessment considering the fault monitoring coverage rate and the false alarm rate. The results indicate that the proposed reliability model of the DRAS, considering the fault monitoring, can express its fault logical relation and redundancy degradation process and identify potential safety hazards.
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adaptive decoupling synchronous control of dissimilar redundant Actuation System for large civil aircraft
Aerospace Science and Technology, 2015Co-Authors: Xingjian Wang, Jun Wang, Shaoping Wang, Mileta TomovicAbstract:Abstract In order to meet the increasing reliability requirements of Actuation System for large civil aircraft, the novel distributed dissimilar redundant Actuation System composed of one hydraulic actuator (HA) and one electro-hydrostatic actuator (EHA) has been applied to the design of advanced aircraft. This configuration can greatly improve the System reliability and effectively avoid potential common-mode/common-cause (CM/CC) failure. However, this Actuation configuration can exhibit force fighting problem between HA and EHA due to their different driving mechanisms and rigid coupling when they operate in the active/active mode, which may even cause damage to the control surface. To resolve this problem, an adaptive decoupling synchronous controller (ADSC) is proposed in this study. The coupling effect between HA and EHA is taken into account, and an adaptive decoupling controller is designed to eliminate the coupling term. Parameter adaption law is designed for the parametric uncertainties. In addition, a feed-forward compensator is proposed to compensate for the difference between HA and EHA by accelerating the dynamic response of EHA. Finally, the comparative simulation results indicate that the proposed ADSC controller has high speed/high robustness performances and can effectively reduce the force fighting between HA and EHA.
Xingjian Wang - One of the best experts on this subject based on the ideXlab platform.
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Trajectory based motion synchronization in a dissimilar redundant Actuation System for a large civil aircraft
2017 29th Chinese Control And Decision Conference (CCDC), 2017Co-Authors: Waheed Ur Rehman, Xingjian Wang, Shaoping Wang, Haq Nawaz, Muhammad Nadeem Iqbal, Mansoor Ali Zaheer, Irfan Azhar, Hassan ElahiAbstract:With the passage of time, the aircraft industry is moving towards more electric aircraft. This creates an opportunity to introduce dissimilar redundant Actuation System in the primary flight control System. The problem arises, such as a force fighting (force difference between the outputs of actuators) in using dissimilar redundant Actuation System. This paper presents a strategy to reduce force fighting for redundant Actuation System of hydraulic actuator (HA) and electro hydrostatic actuator (EHA). A trajectory is designed on the basis of dynamic characteristics of the EHA. The feedback controller is used to improve load rejection performance and the two feed forward controllers to remove the initial force fighting between HA and EHA.
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Active fault-tolerant control of dissimilar redundant Actuation System based on performance degradation reference models
Journal of the Franklin Institute, 2017Co-Authors: Cun Shi, Jun Wang, Xingjian Wang, Shaoping Wang, Mileta M. TomovicAbstract:Dissimilar redundant Actuation System (DRAS) composed of one hydraulic actuator (HA) and one electro-hydrostatic actuator (EHA) represents industry trend in Actuation System towards more electric aircraft (MEA). The paper investigates performance degradation of DRAS under the System malfunctions and addresses the problem of active switching of DRAS from HA to EHA to ensure the reliable Actuation and efficient control. A novel active fault-tolerant controller (AFTC) based on the performance degradation reference models (PDRM) is presented. The main performance degradation rules of DRAS are determined based on the effect of fault degree on the System root locus and the proposed PDRM are then constructed as a series of second-order functions. Finally, an intelligent matching algorithm (MA) is developed based on the dominant closed-loop poles, and a set of adaptive fuzzy controllers (AFC) are designed based on the proposed PDRM and the intelligent MA to achieve the performance degraded fault-tolerant capability. Extensive simulation results are presented to indicate the effectiveness of the proposed AFTC control scheme.
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A multi-fault diagnosis strategy of electro-hydraulic servo Actuation System based on extended Kalman filter
2017 IEEE International Conference on Cybernetics and Intelligent Systems (CIS) and IEEE Conference on Robotics Automation and Mechatronics (RAM), 2017Co-Authors: Xingjian Wang, Shaoping Wang, Chao ZhangAbstract:Electro-hydraulic servo Actuation System is a mechanical, electrical and hydraulic mixing complex System. If it can't be repaired for a long time, it is necessary to consider the possibility of occurrence of multiple faults. Considering this possibility, this paper presents an extended Kalman filter (EKF) based method for multiple faults diagnosis. Through analysing the failure modes and mechanism of the electro-hydraulic servo Actuation System and modelling selected typical failure modes, the relationship between the key parameters of the System and the faults is obtained. The extended Kalman filter which is a commonly used algorithm for estimating parameters is used to on-line fault diagnosis. Then use the extended Kalman filter to diagnose potential faults. The simulation results show that the multi-fault diagnosis method based on extended Kalman filter is effective for multi-fault diagnosis of electro-hydraulic servo Actuation System.
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adaptive decoupling synchronous control of dissimilar redundant Actuation System for large civil aircraft
Aerospace Science and Technology, 2015Co-Authors: Xingjian Wang, Jun Wang, Shaoping Wang, Mileta TomovicAbstract:Abstract In order to meet the increasing reliability requirements of Actuation System for large civil aircraft, the novel distributed dissimilar redundant Actuation System composed of one hydraulic actuator (HA) and one electro-hydrostatic actuator (EHA) has been applied to the design of advanced aircraft. This configuration can greatly improve the System reliability and effectively avoid potential common-mode/common-cause (CM/CC) failure. However, this Actuation configuration can exhibit force fighting problem between HA and EHA due to their different driving mechanisms and rigid coupling when they operate in the active/active mode, which may even cause damage to the control surface. To resolve this problem, an adaptive decoupling synchronous controller (ADSC) is proposed in this study. The coupling effect between HA and EHA is taken into account, and an adaptive decoupling controller is designed to eliminate the coupling term. Parameter adaption law is designed for the parametric uncertainties. In addition, a feed-forward compensator is proposed to compensate for the difference between HA and EHA by accelerating the dynamic response of EHA. Finally, the comparative simulation results indicate that the proposed ADSC controller has high speed/high robustness performances and can effectively reduce the force fighting between HA and EHA.
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Synchronous controller design for dissimilar redundant Actuation System of large civil aircraft
2015 IEEE 10th Conference on Industrial Electronics and Applications (ICIEA), 2015Co-Authors: Xingjian Wang, Jun Wang, Shaoping Wang, Mileta TomovicAbstract:Dissimilar redundant Actuation System has high reliability because of getting rid of central hydraulic power and avoiding common cause failures, which conform to the development trend of future Actuation Systems in large civil aircraft. Despite these advantages, force fighting widely exists in dissimilar redundant Actuation Systems due to the different driving principle and System parameters of different actuators. All these factors can affect output precision, shorten operation life, or even lead to System failure. To cope with this problem, this paper proposes a new adaptive decoupling controller based on motion state synchronization. The parameter adaption law is designed for the parametric uncertainties in the dissimilar redundant Actuation System and motion state synchronization is proposed to deal with the differences between two different actuators. The comparative simulation results between the proposed algorithm and traditional method indicate that the proposed synchronous controller is capable of achieving better tracking control performance and effectively solving the force fighting problem between different actuators.
Y. Eldeeb - One of the best experts on this subject based on the ideXlab platform.
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design of a linear motion dual stage Actuation System for precision control
Smart Materials and Structures, 2009Co-Authors: W. Dong, Jiong Tang, Y. EldeebAbstract:Actuators with high linear-motion speed, high positioning resolution and a long motion stroke are needed in many precision machining Systems. In some current Systems, voice coil motors (VCMs) are implemented for servo control. While the voice coil motors may provide the long motion stroke needed in many applications, the main obstacle that hinders the improvement of the machining accuracy and efficiency is their limited bandwidth. To fundamentally solve this issue, we propose to develop a dual-stage Actuation System that consists of a voice coil motor that covers the coarse motion, and a piezoelectric stack actuator that induces the fine motion, thus enhancing the positioning accuracy. The focus of this present research is the mechatronics design and synthesis of the new Actuation System. In particular, a flexure hinge based mechanism is developed to provide a motion guide and preload to the piezoelectric stack actuator that is serially connected to the voice coil motor. This mechanism is built upon parallel plane flexure hinges. A series of numerical and experimental studies are carried out to facilitate the System design and the model identification. The effectiveness of the proposed System is demonstrated through open-loop studies and preliminary closed-loop control practice. While the primary goal of this particular design is aimed at enhancing optical lens machining, the concept and approach outlined are generic and can be extended to a variety of applications.
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Design of Dual-Stage Actuation System for High Precision Optical Manufacturing
Active and Passive Smart Structures and Integrated Systems 2008, 2008Co-Authors: W. Dong, Jiong Tang, Y. EldeebAbstract:Currently in optical machining Systems, the voice coil actuator is implemented for servo control. The main obstacle that hinders the machining accuracy and efficiency is the limited bandwidth of voice coil. To fundamentally solve this issue, we develop a hybrid Actuation System that consists of the voice coil that covers the coarse motion and a piezoelectric stack that induces the fine motion. The focus of this present research is the mechatronics synthesis of the Actuation System through mechanism design. A series of numerical and experimental studies are carried out to optimally design the dual-stage Actuation System that has adequate bandwidth at the System level while maintaining the stroke and alignment of the piezo stack. The performance of the new System is demonstrated via closed-loop System simulation.
Brian Paden - One of the best experts on this subject based on the ideXlab platform.
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modeling and control of an electromagnetic variable valve Actuation System
IEEE-ASME Transactions on Mechatronics, 2015Co-Authors: Brian Paden, Shaun T Snyder, Michael R RicciAbstract:A novel electromechanical valve Actuation System comprised of a linear actuator, valve, and energy storing cam/spring mechanism is presented. The System dynamics are modeled using Lagrangian mechanics, and a minimum-energy point-to-point optimal control problem is solved to find an optimal trajectory and input. The optimal input is used as a feedforward component in a transition controller to move the valve between the open and closed positions. Between transitions, a simple linear controller stabilizes the valve in the open and closed positions. A high-order model capturing the distributed nature of valve springs is used to validate state constraints related to positive cam/follower forces and a nonslip condition on the cam/follower. Finally, a prototype System is fabricated and tested with promising results.
Mileta Tomovic - One of the best experts on this subject based on the ideXlab platform.
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adaptive decoupling synchronous control of dissimilar redundant Actuation System for large civil aircraft
Aerospace Science and Technology, 2015Co-Authors: Xingjian Wang, Jun Wang, Shaoping Wang, Mileta TomovicAbstract:Abstract In order to meet the increasing reliability requirements of Actuation System for large civil aircraft, the novel distributed dissimilar redundant Actuation System composed of one hydraulic actuator (HA) and one electro-hydrostatic actuator (EHA) has been applied to the design of advanced aircraft. This configuration can greatly improve the System reliability and effectively avoid potential common-mode/common-cause (CM/CC) failure. However, this Actuation configuration can exhibit force fighting problem between HA and EHA due to their different driving mechanisms and rigid coupling when they operate in the active/active mode, which may even cause damage to the control surface. To resolve this problem, an adaptive decoupling synchronous controller (ADSC) is proposed in this study. The coupling effect between HA and EHA is taken into account, and an adaptive decoupling controller is designed to eliminate the coupling term. Parameter adaption law is designed for the parametric uncertainties. In addition, a feed-forward compensator is proposed to compensate for the difference between HA and EHA by accelerating the dynamic response of EHA. Finally, the comparative simulation results indicate that the proposed ADSC controller has high speed/high robustness performances and can effectively reduce the force fighting between HA and EHA.
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Synchronous controller design for dissimilar redundant Actuation System of large civil aircraft
2015 IEEE 10th Conference on Industrial Electronics and Applications (ICIEA), 2015Co-Authors: Xingjian Wang, Jun Wang, Shaoping Wang, Mileta TomovicAbstract:Dissimilar redundant Actuation System has high reliability because of getting rid of central hydraulic power and avoiding common cause failures, which conform to the development trend of future Actuation Systems in large civil aircraft. Despite these advantages, force fighting widely exists in dissimilar redundant Actuation Systems due to the different driving principle and System parameters of different actuators. All these factors can affect output precision, shorten operation life, or even lead to System failure. To cope with this problem, this paper proposes a new adaptive decoupling controller based on motion state synchronization. The parameter adaption law is designed for the parametric uncertainties in the dissimilar redundant Actuation System and motion state synchronization is proposed to deal with the differences between two different actuators. The comparative simulation results between the proposed algorithm and traditional method indicate that the proposed synchronous controller is capable of achieving better tracking control performance and effectively solving the force fighting problem between different actuators.
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Synchronous controller design for dissimilar redundant Actuation System of large civil aircraft
Proceedings of the 2015 10th IEEE Conference on Industrial Electronics and Applications ICIEA 2015, 2015Co-Authors: Cun Shi, Jun Wang, Xingjian Wang, Shaoping Wang, Mileta TomovicAbstract:In order to meet the increasing reliability requirements of Actuation System for large civil aircraft, the novel distributed dissimilar redundant Actuation System composed of one hydraulic actuator (HA) and one electro-hydrostatic actuator (EHA) has been applied to the design of advanced aircraft. This configuration can greatly improve the System reliability and effectively avoid potential common-mode/common-cause (CM/CC) failure. However, this Actuation configuration can exhibit force fighting problem between HA and EHA due to their different driving mechanisms and rigid coupling when they operate in the active/active mode, which may even cause damage to the control surface. To resolve this problem, an adaptive decoupling synchronous controller (ADSC) is proposed in this study. The coupling effect between HA and EHA is taken into account, and an adaptive decoupling controller is designed to eliminate the coupling term. Parameter adaption law is designed for the parametric uncertainties. In addition, a feed-forward compensator is proposed to compensate for the difference between HA and EHA by accelerating the dynamic response of EHA. Finally, the comparative simulation results indicate that the proposed ADSC controller has high speed/high robustness performances and can effectively reduce the force fighting between HA and EHA.
