The Experts below are selected from a list of 48 Experts worldwide ranked by ideXlab platform

Nils Werner - One of the best experts on this subject based on the ideXlab platform.

  • IECON - Hysteresis compensation in a piezo-hydraulic actuator using heuristic phase correction of periodic trajectories
    IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016
    Co-Authors: Benedikt Haus, Paolo Mercorelli, Nils Werner
    Abstract:

    The paper deals with a heuristical approach to compensate friction hysteresis in an aggregate actuator which is proposed to be applied in a camless engine system and which consists of piezoelectric, mechanic and hydraulic components. The hydraulic displacement amplifier shows a conspicuous hysteresis effect that appears to be a dead time that depends on the speed of the engine. In general, with high engine speeds, the dead time effect is reduced. The compensation of the hysteresis effect is not model-based since the real time application must run within a very short time. The presented approach consists of an adaptive pre-action on the desired Servo Piston trajectory which is generated by a feedforward action fed by phase-variable Gaussian curves as desired valve trajectories. Simulations show the effectiveness of the proposed compensating techniques.

  • Hysteresis compensation in a piezo-hydraulic actuator using heuristic phase correction of periodic trajectories
    IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016
    Co-Authors: Benedikt Haus, Paolo Mercorelli, Nils Werner
    Abstract:

    The paper deals with a heuristical approach to compensate friction hysteresis in an aggregate actuator which is proposed to be applied in a camless engine system and which consists of piezoelectric, mechanic and hydraulic components. The hydraulic displacement amplifier shows a conspicuous hysteresis effect that appears to be a dead time that depends on the speed of the engine. In general, with high engine speeds, the dead time effect is reduced. The compensation of the hysteresis effect is not model-based since the real time application must run within a very short time. The presented approach consists of an adaptive pre-action on the desired Servo Piston trajectory which is generated by a feedforward action fed by phase-variable Gaussian curves as desired valve trajectories. Simulations show the effectiveness of the proposed compensating techniques.

  • Pressure fault recognition and compensation with an adaptive feedforward regulator in a controlled hybrid actuator within engine applications
    IFAC-PapersOnLine, 2015
    Co-Authors: Paolo Mercorelli, Benedikt Haus, Nils Werner
    Abstract:

    Abstract In this paper a pressure fault recognition and its compensation in a controlled hybrid actuator are proposed. The hybrid actuator consists of a piezo mechanical structure and a hydraulic stroke displacement ratio for adapting the position of the Servo Piston to be used in a camless engine. Because of the presence of two sealings, a possible pressure failure can occur. An adaptive Feedforward control strategy in combination with Feedback control to track a periodic signal is considered. After the detection of the pressure fault its compensation is possible through this adaptive Feedforward control. Measured results carry out the suitability of the control approach together with the pressure fault recognition and its compensation.

  • A Kalman Filter for sensorless control of a piezo actuator for camless internal combustion engines
    2014 International Symposium on Power Electronics Electrical Drives Automation and Motion, 2014
    Co-Authors: Kemo Hodzic, Paolo Mercorelli, Nils Werner
    Abstract:

    This paper deals with an actuator composed by a piezo and a Servo Piston and a Kalman Filter structure for camless engine motor applications. The considered system is assumed to be linear. The electrical actuator is realized with a piezostack which operates between 0-1000 V. The piezostack is connected through an reduction ratio with the Servo Piston, this link causes the mechanical movement of the Servo Piston. This paper will show measured velocity and position of the Piston - shown by real simulation data- and simultaneously the estimated data which were calculated and simulated with MATLAB/Simulink, by the recursive estimation algorithm by R. E. Kalman.

Paolo Mercorelli - One of the best experts on this subject based on the ideXlab platform.

  • Sensing of the Engine Cylinder Valves Motion
    Proceedings, 2016
    Co-Authors: Leander Behre, Paolo Mercorelli
    Abstract:

    This paper deals with all required parts to set up the full variable valve train (FVVT) system to be used in intake and exhaust valves of combustion engines from the electrical/electronic point of view. This includes the displacement and pressure sensors that are needed to conduct research on the fully variable valve train while in operation and the electronic auxiliaries such as the amplifier for the piezo actuator, the dSPACE control system and the used function generator. In particular, the use of displacement transducers for all relevant Pistons and stems is crucial for the FVVT system control. As only the piezo actuator is equipped with a displacement sensor, the remaining sensors still need to be chosen. Within the previous FVVT system two different displacement sensors have been used on the engine valve stem. Three displacement sensors and one pressure sensor are implemented into the mechanical core of the system (consisting of lever transmission, control unit, Servo valve and engine valve body), which is driven by the piezo actuator and supplied with hydraulic pressure by a pump, that requires a 230 V power supply and a tank, which the hydraulic fluid can return to. While the pressure sensor monitors the hydraulic pressure within the lever transmission, displacement sensors need to be chosen to monitor the motion of the (1) control Piston in the control unit; (2) Servo Piston within the Servo valve; (3) engine valves. Measured results are presented.

  • IECON - Hysteresis compensation in a piezo-hydraulic actuator using heuristic phase correction of periodic trajectories
    IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016
    Co-Authors: Benedikt Haus, Paolo Mercorelli, Nils Werner
    Abstract:

    The paper deals with a heuristical approach to compensate friction hysteresis in an aggregate actuator which is proposed to be applied in a camless engine system and which consists of piezoelectric, mechanic and hydraulic components. The hydraulic displacement amplifier shows a conspicuous hysteresis effect that appears to be a dead time that depends on the speed of the engine. In general, with high engine speeds, the dead time effect is reduced. The compensation of the hysteresis effect is not model-based since the real time application must run within a very short time. The presented approach consists of an adaptive pre-action on the desired Servo Piston trajectory which is generated by a feedforward action fed by phase-variable Gaussian curves as desired valve trajectories. Simulations show the effectiveness of the proposed compensating techniques.

  • Hysteresis compensation in a piezo-hydraulic actuator using heuristic phase correction of periodic trajectories
    IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016
    Co-Authors: Benedikt Haus, Paolo Mercorelli, Nils Werner
    Abstract:

    The paper deals with a heuristical approach to compensate friction hysteresis in an aggregate actuator which is proposed to be applied in a camless engine system and which consists of piezoelectric, mechanic and hydraulic components. The hydraulic displacement amplifier shows a conspicuous hysteresis effect that appears to be a dead time that depends on the speed of the engine. In general, with high engine speeds, the dead time effect is reduced. The compensation of the hysteresis effect is not model-based since the real time application must run within a very short time. The presented approach consists of an adaptive pre-action on the desired Servo Piston trajectory which is generated by a feedforward action fed by phase-variable Gaussian curves as desired valve trajectories. Simulations show the effectiveness of the proposed compensating techniques.

  • Pressure fault recognition and compensation with an adaptive feedforward regulator in a controlled hybrid actuator within engine applications
    IFAC-PapersOnLine, 2015
    Co-Authors: Paolo Mercorelli, Benedikt Haus, Nils Werner
    Abstract:

    Abstract In this paper a pressure fault recognition and its compensation in a controlled hybrid actuator are proposed. The hybrid actuator consists of a piezo mechanical structure and a hydraulic stroke displacement ratio for adapting the position of the Servo Piston to be used in a camless engine. Because of the presence of two sealings, a possible pressure failure can occur. An adaptive Feedforward control strategy in combination with Feedback control to track a periodic signal is considered. After the detection of the pressure fault its compensation is possible through this adaptive Feedforward control. Measured results carry out the suitability of the control approach together with the pressure fault recognition and its compensation.

  • A Kalman Filter for sensorless control of a piezo actuator for camless internal combustion engines
    2014 International Symposium on Power Electronics Electrical Drives Automation and Motion, 2014
    Co-Authors: Kemo Hodzic, Paolo Mercorelli, Nils Werner
    Abstract:

    This paper deals with an actuator composed by a piezo and a Servo Piston and a Kalman Filter structure for camless engine motor applications. The considered system is assumed to be linear. The electrical actuator is realized with a piezostack which operates between 0-1000 V. The piezostack is connected through an reduction ratio with the Servo Piston, this link causes the mechanical movement of the Servo Piston. This paper will show measured velocity and position of the Piston - shown by real simulation data- and simultaneously the estimated data which were calculated and simulated with MATLAB/Simulink, by the recursive estimation algorithm by R. E. Kalman.

E.v. Denisova - One of the best experts on this subject based on the ideXlab platform.

  • The model of the Servo Piston of the fuel metering unit using matrix approach and neural network
    Multiphase Systems, 2018
    Co-Authors: E.v. Denisova, M.a. Chernikova
    Abstract:

    In the paper, the model of a Servo Piston of a fuel metering unit based on a matrix approach using neural networks is considered. To develop the model of a Servo Piston, the dependence of the initial Piston deviation on the control signal for different values of the nozzles is used. This dependence is represented in the form of a matrix and is used in the neural network. This approach allows describing the movement of the Servo Piston with a sufficient degree of accuracy. As a record of change squares adjustment of the nozzles is a source of parametric uncertainty in the operation of the automatic control system can lead to a drop in the quality of control, such accounting is relevant. The model of the Servo Piston is proposed to be used in the structure of the automatic control system for a gas turbine engine and for semi-natural stands.

  • Full-size mathematical model of the fuel metering unit
    Proceedings of the Mavlyutov Institute of Mechanics, 2011
    Co-Authors: E.sh. Nasibullaeva, E.v. Denisova, I.sh. Nasibullayev
    Abstract:

    The paper presents a nonlinear mathematical model for the operation of the fuel metering unit, which takes into account the operation of the control valve, which includes two Pistons and three fuel circuits. A technique for determining the initial conditions for a system of ordinary differential equations describing the movements of a Servo Piston, a Piston of a constant pressure gradient valve and a Piston of a control valve is proposed.

  • Modeling of the problem of the fuel metering unit functioning
    Proceedings of the Mavlyutov Institute of Mechanics, 2010
    Co-Authors: E.v. Denisova, E.sh. Nasibullaeva
    Abstract:

    In the paper, a dynamic model of the fuel metering unit (FMU) functioning is considered numerically, which includes three moving elements (Servo Piston, throttle needle and constant-drop valve). Numerical calculations showed that the characteristics of FMU as an element of the automatic control system are nonlinear and inhomogeneous, and that cavitation regimes may arise in the cavities of FMU.

Benedikt Haus - One of the best experts on this subject based on the ideXlab platform.

  • IECON - Hysteresis compensation in a piezo-hydraulic actuator using heuristic phase correction of periodic trajectories
    IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016
    Co-Authors: Benedikt Haus, Paolo Mercorelli, Nils Werner
    Abstract:

    The paper deals with a heuristical approach to compensate friction hysteresis in an aggregate actuator which is proposed to be applied in a camless engine system and which consists of piezoelectric, mechanic and hydraulic components. The hydraulic displacement amplifier shows a conspicuous hysteresis effect that appears to be a dead time that depends on the speed of the engine. In general, with high engine speeds, the dead time effect is reduced. The compensation of the hysteresis effect is not model-based since the real time application must run within a very short time. The presented approach consists of an adaptive pre-action on the desired Servo Piston trajectory which is generated by a feedforward action fed by phase-variable Gaussian curves as desired valve trajectories. Simulations show the effectiveness of the proposed compensating techniques.

  • Hysteresis compensation in a piezo-hydraulic actuator using heuristic phase correction of periodic trajectories
    IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016
    Co-Authors: Benedikt Haus, Paolo Mercorelli, Nils Werner
    Abstract:

    The paper deals with a heuristical approach to compensate friction hysteresis in an aggregate actuator which is proposed to be applied in a camless engine system and which consists of piezoelectric, mechanic and hydraulic components. The hydraulic displacement amplifier shows a conspicuous hysteresis effect that appears to be a dead time that depends on the speed of the engine. In general, with high engine speeds, the dead time effect is reduced. The compensation of the hysteresis effect is not model-based since the real time application must run within a very short time. The presented approach consists of an adaptive pre-action on the desired Servo Piston trajectory which is generated by a feedforward action fed by phase-variable Gaussian curves as desired valve trajectories. Simulations show the effectiveness of the proposed compensating techniques.

  • Pressure fault recognition and compensation with an adaptive feedforward regulator in a controlled hybrid actuator within engine applications
    IFAC-PapersOnLine, 2015
    Co-Authors: Paolo Mercorelli, Benedikt Haus, Nils Werner
    Abstract:

    Abstract In this paper a pressure fault recognition and its compensation in a controlled hybrid actuator are proposed. The hybrid actuator consists of a piezo mechanical structure and a hydraulic stroke displacement ratio for adapting the position of the Servo Piston to be used in a camless engine. Because of the presence of two sealings, a possible pressure failure can occur. An adaptive Feedforward control strategy in combination with Feedback control to track a periodic signal is considered. After the detection of the pressure fault its compensation is possible through this adaptive Feedforward control. Measured results carry out the suitability of the control approach together with the pressure fault recognition and its compensation.

E.sh. Nasibullaeva - One of the best experts on this subject based on the ideXlab platform.

  • Full-size mathematical model of the fuel metering unit
    Proceedings of the Mavlyutov Institute of Mechanics, 2011
    Co-Authors: E.sh. Nasibullaeva, E.v. Denisova, I.sh. Nasibullayev
    Abstract:

    The paper presents a nonlinear mathematical model for the operation of the fuel metering unit, which takes into account the operation of the control valve, which includes two Pistons and three fuel circuits. A technique for determining the initial conditions for a system of ordinary differential equations describing the movements of a Servo Piston, a Piston of a constant pressure gradient valve and a Piston of a control valve is proposed.

  • Modeling of the problem of the fuel metering unit functioning
    Proceedings of the Mavlyutov Institute of Mechanics, 2010
    Co-Authors: E.v. Denisova, E.sh. Nasibullaeva
    Abstract:

    In the paper, a dynamic model of the fuel metering unit (FMU) functioning is considered numerically, which includes three moving elements (Servo Piston, throttle needle and constant-drop valve). Numerical calculations showed that the characteristics of FMU as an element of the automatic control system are nonlinear and inhomogeneous, and that cavitation regimes may arise in the cavities of FMU.