Descriptor observer approaches for multivariable systems with measurement noises and application in fault detection and diagnosis
Descriptor observer approaches for multivariable systems with measurement noises and application in fault detection and diagnosis
复制标题
具有测量噪声的多变量系统的描述符观测器方法及其在故障检测和诊断中的应用
DOI：
10.1016/j.sysconle.2005.08.004
复制
发表时间：
2006-04-01
影响因子：
2.6
通讯作者：
Wang, H
中科院分区：
文献类型：
--
作者：
Gao, ZW;Wang, H
本文针对具有测量噪声的多变量系统，提出了一种新的广义观测器设计方法。如果系统矩阵是稳定的，所提出的改进的比例微分观测器技术允许我们不仅完全解耦的任何形式的测量噪声，但也获得准确的估计系统的状态和测量噪声。如果系统是可检测的，噪声是有界的，它已被证明，两个设计参数可以提供更多的自由度。在这种情况下，选择微分增益参数以减少噪声的放大，然后选择比例增益以保证误差动态的稳定性。对于既有测量输出噪声又有输入干扰的系统，构造了一种改进的比例、微分和积分观测器，使系统的状态、输入干扰和输出噪声同时渐近估计。文中还讨论了该观测器在执行器和传感器故障系统中的应用。数值例子说明了设计过程，仿真结果表明了令人满意的跟踪性能。(c)2005 Elsevier B.V.保留所有权利。
In this paper, new descriptor observer design approaches are presented for multivariable systems with measurement noises. If the system matrix is stable, the proposed modified proportional and derivative observer technique allows us not only to decouple the measurement noise in any forms completely, but also obtain accurate estimations of both system states and measurement noises. If the system is detectable and the noise is bounded, it has been shown that two design parameters can provide more degrees of freedom. In this context, the derivative gain parameter is chosen to reduce the amplification of the noise, and the proportional gain is then selected to guarantee the stability of the error dynamics. For systems with both measurement output noises and input disturbances, a modified proportional, derivative and integral observer is constructed to asymptotically estimate states, input disturbances, and output noises at the same time. The applications of the proposed observers for systems with actuator and sensor faults are also discussed. Numerical examples are given to illustrate the design procedures, and the simulation results show the satisfactory tracking performance. (c) 2005 Elsevier B.V. All rights reserved.