LONG Yi-fu1,2,WANG Xi1,2.A Promoted Design Approach for Unknown Input Observer[J].航空发动机,2017,43(5):7-13
A Promoted Design Approach for Unknown Input Observer
DOI:
Key Words:UIO  fault diagnosis  linear correlation  sensor
Author NameAffiliationE-mail
LONG Yi-fu1,2,WANG Xi1,2 1. School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, 2. Collaborative Innovation Center for Advanced Aero-Engine, Beijing 100191, China 357773591@qq.com 
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Abstract:This paper presents a promoted Unknown Input Observer (UIO) design approach to solve linear correlation problem while designing UIO. It is a generalized method in UIO designing. Through the linear correlation analysis of measurement output, the measured output can be reasonable grouping so that each group contains partially linearly independent output and ensure that these groups cover all the measurement output sensors that need to be diagnosed. Based on those conditions above, the existence condition of those UIOs are met and they were designed for different groups, those UIOs were used to carry out on the sensor fault diagnosis algorithm. Ultimately, a case study in aero engine has employed for confirming the feasibility of this new approach. It has been certificated that the new approach has extensively good engineering application result.
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