Fault management method based on Modelica model

Abstract

The invention provides a fault management method based on a Modelica model. The method comprises the following specific steps of (1) fault analysis; (2) fault classification; (3) fault modelling; (4) fault extraction; and (5) fault injection for realizing modification of parameters of a fault component in the Modelica model, wherein the fault injection includes parameter type fault injection and variable type fault injection. Through the steps, the fault management based on the Modelica model is realized, the flexible modelling of the fault component and a unified fault management interface are provided, and a unified fault injection mode is adopted to be convenient for application of subsequent search methods related to fault management. The method has the characteristics of simple Modelica language modelling, visual display, strong applicability and the like, so that the method can well adapt to a complex system with the stronger electromechanical liquid coupling, the unified and reliable fault management method is provided, the construction period of subsequent fault diagnosis platforms is reduced, and the method has popularization and application value.

Description

technical field [0001] The invention provides a failure management method based on a Modelica model, which belongs to the field of complex electromechanical systems. Background technique [0002] As the complexity of electromechanical systems continues to rise, in order to improve system reliability, fault detection and health management for electromechanical systems are becoming more and more important. In addition, the implementation of fault detection and health management related algorithms for the system requires a reliable prediction model combined with an effective Fault Management Approach , to guarantee triggering of all possible failures of the system. Therefore, a uniform, reliable Fault Management Approach It is an important part of implementing system fault detection and health management. [0003] Based on the Modelica model Fault Management Approach , realizing the unified management of simulation models and fault models. It also provides an effective imp...

AI Technical Summary

Problems solved by technology

[0004] Currently, based on the Modelica model Fault Management Approach Can not be unified, each method has its own shortcomings, so that the fault detection based on the Modelica model cannot match each other

[0005] (1) In [Inclusion of Reliability and Safety Analysis Methods in Modelica.In Inclusion of Reliability and Safety Analysis Methods in Modelica (June 2011), pp.616–627], Modelica fault management uses parameter type data to define faults, and cannot manage variable types faults, which do not reflect the dynamic properties of the system

[0006] (2) In [Fault Detection of Power Electronic Circuit using WaveletAnalysis in Modelica.In Proceedings of the 9th International MODELICAConference (Munich, Germany, Sept.2012), no.76, pp.513–522], only the preset Fault type, the type of fault cannot be defined according to the requirements

[0007] (3) In [A Tool for Simulation-based Test of Mechatronic Designs.InProceedings of the 6th International Modelica Conference(2008)pp.341–348], in the implementation of Modelica faults, an uncertain interval is set by an external program and combined with the model Behavior to implement fault management, so it does not support a unified fault injection method

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