Design method for robust fault detection filter (RFDF)

A filter design and fault detection technology, applied in the control field, can solve problems such as homogeneous polynomial parameter dependence, and achieve the effect of reducing conservatism

Inactive Publication Date: 2012-05-02
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

[0005] In order to solve the technical problem of "introducing the parameter-dependent Lyapunov function (PDLF) method into the problem of robust fault detection of linear time-invariant systems with convex polyhedron uncertainty", this application provides a linear uncertainty Homogeneous Polynomial Parameter Dependent Lyapunov Function Method for Robust Fault Detection Filter Design for Sexual Systems

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  • Design method for robust fault detection filter (RFDF)
  • Design method for robust fault detection filter (RFDF)
  • Design method for robust fault detection filter (RFDF)

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[0097] The validity and applicability of the proposed method to the fault detection problem are shown by the following example, which illustrates how the results obtained above can be applied to the design of RFDF for uncertain linear time-invariant systems (1). Consider the following LTI system with polyhedral uncertainty:

[0098] A = 0 1 0 0 6.22 10.35 23.14 + δ 1 36.26 + δ 2 0 0 ...

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Abstract

The invention belongs to the field of control, and provides a design method for a robust fault detection filter (RFDF) on the basis of a parameter-dependent Liapunov function method. A PDLF method is introduced into robust fault detection of a linear time-constant system with convex polyhedron non-determinacy. During processing of the RFDF design, the problem is distinguishing faults and other interference, which is remarkably different from robust analysis and control. An H_/H infinite normal form is adopted, which comprises two phases: (1) an optimal RFDF design method of a residual error generator with certain interference attenuation and maximum fault sensitivity, and (2) a method for designing a threshold value for a residual error generated by estimation.

Description

technical field [0001] The invention belongs to the field of control and provides a robust fault detection filter design method based on a parameter dependent Lyapunov function method. Background technique [0002] Due to the increasing demand for high availability and high reliability of modern control systems, model-based fault detection is a very important technical issue. In a fault detection scheme, it is common to build a residual signal and compare it to a predetermined threshold: if the residual signal is larger than the threshold, an alarm will be generated. Since noise and interference may cause significant changes in the residual signal, the fault detection filter must remain robust in order to avoid false alarms. However, unlike concepts in robust control, the robustness of a fault detection system is not only affected by model faults and disturbances, but also related to the sensitivity to possible faults that need to be detected. Therefore, the problem of mod...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04G05B23/00
Inventor 徐式蕴汤涌孙华东安之周子冠张杏珍
Owner CHINA ELECTRIC POWER RES INST
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