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首页> 外文期刊>IEEE / ASME Transactions on Mechatronics >Reliability Assessment of Electrohydraulic Actuation Control System Subject to Multisources Degradation Processes
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Reliability Assessment of Electrohydraulic Actuation Control System Subject to Multisources Degradation Processes

机译：多源降解过程下电液致动控制系统的可靠性评估

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The electrohydraulic actuation (EHA) control system is commonly utilized in aeronautic industry, such as in undercarriage control system, and plays an important part in preserving the security and stability. This article proposed a piecewise deterministic Markov process (PDMP) based modeling framework for the reliability assessment of EHA closed-loop control system subject to multisources degradation processes. The multisources degradation integrally consists of continuous and discrete degradation processes of different electrohydraulic components, caused by wear and input variation. The dependence among the multisources degradation processes is explicitly modeled based on the PDMP modeling framework. The failure criteria of EHA closed-loop control system are proposed, which involve the settling time, overshooting value, and steady-state error of output. Furthermore, the Monte Carlo simulation is employed to compute the system reliability. An EHA closed-loop control system used in the aeronautic undercarriage system is presented as an illustrative case to demonstrate the effectiveness of the proposed framework.
机译：电液驱动（EHA）控制系统通常用于航空工业，例如起落架控制系统，并且在保持安全性和稳定性方面起着重要的作用。本文提出了一种基于分段确定性马尔可夫过程（PDMP）的建模框架，用于多源退化过程下EHA闭环控制系统的可靠性评估。多源降解整体上由磨损和输入变化引起的不同电液组件的连续和离散降解过程组成。基于PDMP建模框架，对多源降级过程之间的依赖性进行了显式建模。提出了EHA闭环控制系统的故障准则，该准则涉及稳定时间，超调值和输出稳态误差。此外，采用蒙特卡洛模拟来计算系统可靠性。介绍了在航空起落架系统中使用的EHA闭环控制系统，作为例证性案例来证明所提出框架的有效性。

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