NDLI: Observer canonical form based robust fault detection and estimation for hyperbolic spatiotemporal dynamic systems

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Observer canonical form based robust fault detection and estimation for hyperbolic spatiotemporal dynamic systems

Content Provider	IET Digital Library
Author	Xu, Xiaodong Du, Yuncheng Dubljevic, Stevan
Abstract	In this study, the authors propose a novel state and a fault estimation scheme for a class of hyperbolic spatiotemporal dynamic systems in the presence of unknown external disturbance. They consider the occurrence of multiplicative actuator and sensor faults. In detail, they consider two cases of fault occurrence: (i) only one type (actuator or sensor) of fault happens; (ii) two types of faults occur simultaneously. This study discusses the fault detectability conditions by proposing a fault detection observer. To complete the estimation problem, three difficulties arise: (i) no prior information shows the type of faults; (ii) the observer design is non-linear due to multiplication between plant signals (state or input) and unknown fault parameters; (iii) only one boundary measurement is available. They convert the original faulty plant into its observer canonical form. By proposing two filters based on the resulting observer canonical form, they develop novel parameter update laws for fault parameter estimation. With the proposed update laws, the true state of the faulty plant can be estimated by the proposed observers. By selecting appropriate Lyapunov functions, they prove that estimation error of state and fault parameters exponentially decays to an arbitrarily small neighbourhood of zero despite unknown external disturbance.
Starting Page	168
Ending Page	180
Page Count	13
Volume Number	2
e-ISSN	26316315
Issue Number	Issue 4, Dec (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-csr/2/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-csr.2020.0019
Journal	IET Cyber-Systems and Robotics
Publisher	The Institution of Engineering and Technology Zhejiang University Press
Publisher Date	2020-09-03
Access Restriction	Open
Rights License	Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)
Subject Keyword	Actuators Adaptive Control Control System Analysis Estimation Error Estimation Problem Fault Detectability Condition Fault Detection Observer Fault Diagnosis Fault Estimation Scheme Fault Occurrence Hyperbolic Spatiotemporal Dynamic System Lyapunov Method Modelling And Identification Multiplicative Actuator Nonlinear Control System Nonlinear Problem Novel Parameter Update Law Observer Design Observers Original Faulty Plant Plant Signal Resulting Observer Canonical Form Robust Control Robust Fault Detection Self Adjusting Control System Sensor Fault Simulation Stability in Control Theory Statistics Synthesis Method Unknown External Disturbance Unknown Fault Parameter
Content Type	Text
Resource Type	Article

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