Actuator and sensor fault estimation design method for switching system

A sensor failure, switching system technology, applied in design optimization/simulation, complex mathematical operations, etc., can solve problems such as estimating performance impact

Active Publication Date: 2020-05-01
HUAIYIN INSTITUTE OF TECHNOLOGY
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Problems solved by technology

Conversely, if the fault changes frequently, the estimation performance may be affected by the fault differential

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  • Actuator and sensor fault estimation design method for switching system
  • Actuator and sensor fault estimation design method for switching system
  • Actuator and sensor fault estimation design method for switching system

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Embodiment Construction

[0074] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0075] The present invention takes the continuous-time switching system model as the implementation object, and proposes a design method for an adaptive fault estimation observer for a switching system with actuator and sensor faults, which can theoretically Realize the online fault estimation of the system.

[0076] Note: In the algorithm of the present invention, the P involved T , P - respectively represent the transposition of the matrix P and the inverse matrix of the matrix, P>0 (Pn Represents an n-dimensional real vector set, I and 0 represent the identity matrix and 0 matrix with appropriate dimensions, and * in the text represents the symmetric item in the symmetric matrix.

[0077] In the present invention, some lemmas and related definitions are also used, and a brief description is given first:

[0078] 1) Definition 1: For any switching signal σ i (t...

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Abstract

The invention discloses an actuator and sensor fault estimation design method for a switching system. The method comprises the steps: 1) building a continuous time switching system model, and completing the preparation work; 2) designing a fault estimation observer, and designing observer parameters to obtain a gain matrix of the fault estimation observer; and 3) accurately estimating a state actuator fault fa (t), a sensor fault fs (t) and measurement disturbance omega (t) of the system on line. Compared with the prior art, the self-adaptive observer serves as a fault diagnosis observer, therobustness of a fault diagnosis system to external disturbance is met, an error system is made to be stable, the H-infinity performance index is met, and accurate on-line estimation on actuator and sensor faults of the system is achieved.

Description

technical field [0001] This paper deals with the design of an adaptive fault estimation observer for switched systems with actuator and sensor faults. Background technique [0002] With the rapid development of science and technology, engineering systems are becoming more and more complex, which makes the requirements for system safety and reliability higher and higher. In the actual production process, system failure is inevitable, which will lead to system performance degradation, poor stability, system paralysis, and even catastrophic property and personnel losses. Aiming at the fault problem in industrial production, people put forward an effective method - fault diagnosis technology, and it has been widely used. Fault diagnosis technology includes three parts: fault detection, fault isolation and fault estimation. Fault detection is the primary task of fault diagnosis technology, which is to quickly judge whether the system is faulty. The fault is determined, and the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F17/13G06F17/16
CPCG06F17/13G06F17/16
Inventor 杨月杜董生吴瑜王业琴唐中一周红标
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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