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首页> 外文期刊>Journal of Dynamic Systems, Measurement, and Control >Quantitative Fault Tolerant Control Design for a Leaking Hydraulic Actuator
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Quantitative Fault Tolerant Control Design for a Leaking Hydraulic Actuator

机译：泄漏液压执行器的定量容错控制设计

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摘要

This paper documents the design of a low-order, fixed-gain, controller that can maintain the positioning performance of an electrohydraulic actuator operating under variable load with a leaking piston seal. A set of linear time-invariant equivalent models of the faulty hydraulic actuator is first established, in the frequency domain, by Fourier transformation of acceptable actuator input-output responses. Then, a robust position control law is synthesized by quantitative feedback theory to meet the prescribed design tolerances on closed-loop stability and reference tracking. The designed fault tolerant controller uses only actuator position as feedback, yet it can accommodate nonlinearities in the hydraulic functions, maintain robustness against typical parametric uncertainties, and maintain the closed-loop performance despite a leakage fault that can bypass up to 40% of the rated servovalve flow across the actuator piston. To demonstrate the utility of the fault tolerant control approach in a realistic application, the experimental fault tolerant hydraulic system is operated as a flight surface actuator in the hardware-in-the-loop simulation of a high-performance jet aircraft.
机译：本文介绍了一种低阶固定增益控制器的设计，该控制器可以保持电动液压执行器的定位性能，该电动液压执行器在可变负载下具有泄漏的活塞密封件。首先通过对可接受的执行器输入输出响应进行傅立叶变换，在频域中建立故障液压执行器的一组线性时不变等效模型。然后，通过定量反馈理论合成鲁棒的位置控制定律，以满足闭环稳定性和参考跟踪的规定设计公差。设计的容错控制器仅使用执行器位置作为反馈，但是它可以适应液压功能中的非线性特性，保持对典型参数不确定性的鲁棒性，即使泄漏故障可以绕过额定值的40％，也可以保持闭环性能伺服阀流过执行器活塞。为了演示容错控制方法在实际应用中的实用性，在高性能喷气式飞机的硬件在环仿真中，将实验容错液压系统用作飞行表面执行器。

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    Mark Karpenko and Nariman Sepehri;

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    Author(s):Mark Karpenko, NSERC Postdoctoral Research FellowDepartment of Mechanical and Aerospace Engineering, Naval Postgraduate School, Monterey, CA 93943Nariman Sepehri, ProfessorDepartment of Mechanical and Manufacturing Engineering, Fluid Power Research Laboratory, University of Manitoba, Winnipeg, MB, R3T 5V6, Canada;

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