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Actuation System

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Shaoping Wang – 1st expert on this subject based on the ideXlab platform

  • Trajectory based motion synchronization in a dissimilar redundant Actuation System for a large civil aircraft
    2017 29th Chinese Control And Decision Conference (CCDC), 2017
    Co-Authors: Waheed Ur Rehman, Xingjian Wang, Shaoping Wang, Haq Nawaz, Muhammad Nadeem Iqbal, Mansoor Ali Zaheer, Irfan Azhar, Hassan Elahi

    Abstract:

    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.

  • Active fault-tolerant control of dissimilar redundant Actuation System based on performance degradation reference models
    Journal of the Franklin Institute, 2017
    Co-Authors: Cun Shi, Xingjian Wang, Shaoping Wang, Jun Wang, Mileta M. Tomovic

    Abstract:

    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.

  • 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), 2017
    Co-Authors: Xingjian Wang, Shaoping Wang, Chao Zhang

    Abstract:

    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.

Xingjian Wang – 2nd expert on this subject based on the ideXlab platform

  • Trajectory based motion synchronization in a dissimilar redundant Actuation System for a large civil aircraft
    2017 29th Chinese Control And Decision Conference (CCDC), 2017
    Co-Authors: Waheed Ur Rehman, Xingjian Wang, Shaoping Wang, Haq Nawaz, Muhammad Nadeem Iqbal, Mansoor Ali Zaheer, Irfan Azhar, Hassan Elahi

    Abstract:

    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.

  • Active fault-tolerant control of dissimilar redundant Actuation System based on performance degradation reference models
    Journal of the Franklin Institute, 2017
    Co-Authors: Cun Shi, Xingjian Wang, Shaoping Wang, Jun Wang, Mileta M. Tomovic

    Abstract:

    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.

  • 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), 2017
    Co-Authors: Xingjian Wang, Shaoping Wang, Chao Zhang

    Abstract:

    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.

Y. Eldeeb – 3rd expert on this subject based on the ideXlab platform

  • design of a linear motion dual stage Actuation System for precision control
    Smart Materials and Structures, 2009
    Co-Authors: W. Dong, Jiong Tang, Y. Eldeeb

    Abstract:

    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.

  • Design of Dual-Stage Actuation System for High Precision Optical Manufacturing
    Active and Passive Smart Structures and Integrated Systems 2008, 2008
    Co-Authors: W. Dong, Jiong Tang, Y. Eldeeb

    Abstract:

    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.