一类伴有不匹配未知干扰的线性系统的故障检测
Journal of Beijing Jiaotong University（2018）
Abstract
针对伴有不匹配未知干扰的线性时不变系统,本文将降维观测器的设计方法和未知干扰建模技术相结合,设计出对未知干扰解耦的故障检测观测器.首先,将部分匹配未知干扰从未知干扰中分离出来,剩余的外部干扰部分即为不匹配未知干扰;然后,依据先验知识对不匹配未知干扰代数建模,构建增广系统,使得秩条件得以满足;最后,针对增广系统设计故障检测观测器,使得残差对未知干扰鲁棒,对故障敏感.通过对一个机器人子系统实例进行仿真,仿真结果表明本文所提出的方法是有效的.
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