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A Non-Uniform Predictor-Observer for a Networked Control System
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  • A Non-Uniform Predictor-Observer for a Networked Control System
  • A Non-Uniform Predictor-Observer for a Networked Control System
저자명
Cuenca. Angel,Garcia. Pedro,Albertos. Pedro,Salt. Julian
간행물명
International Journal of Control, Automation and Systems
권/호정보
2011년|9권 6호|pp.1194-1202 (9 pages)
발행정보
제어로봇시스템학회
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정기간행물|ENG|
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기타
이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

This paper presents a Non-Uniform Predictor-Observer (NUPO) based control approach in order to deal with two of the main problems related to Networked Control Systems (NCS) or Sensor Networks (SN): time-varying delays and packet loss. In addition, if these delays are longer than the sampling period, the packet disordering phenomenon can appear. Due to these issues, a (scarce) nonuniform, delayed measurement signal could be received by the controller. But including the NUPO proposal in the control system, the delay will be compensated by the prediction stage, and the non-available data will be reconstructed by the observer stage. So, a delay-free, uniformly sampled controller design can be adopted. To ensure stability, the predictor must satisfy a feasibility problem based on a time-varying delay-dependent condition expressed in terms of Linear Matrix Inequalities (LMI). Some aspects like the relation between network delay and robustness/performance trade-off are empirically studied. A simulation example shows the benefits (robustness and control performance improvement) of the NUPO approach by comparison to another similar proposal.