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Multiple Incipient Faults Prognosis for ccbii braking system

Multiple Incipient Faults Prognosis for CCBII Braking System

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第26届中国控制与决策会议

作者： Yingze Yang Rui Bin Zhiwu Huang Yufu Qin Jiandui Yi School of Information Science and Engineering Central South University Hunan Engineering Laboratory for Advanced Control and Intelligent Automation

Due to various operation modes, complex working environment, and various components with strong coupling in ccbii braking system, multiple incipient faults may happen simultaneously. It is difficult to carry out the multiple incipient faults prognosis for the ccbii braking system using the traditional faults prognosis techniques. In this article, a model-based fault prognosis approach is used for ccbii braking system with multiple incipient faults. Firstly, the models of the working modes are established, the latest concept of Augmented Global Analytical Redundancy Relations(AGARRs) is used to consider parametric and nonparametric incipient fault prediction. Before the faults are detected, mode tracking is realized by comparing Mode-change Signature Matrix(MCSM) with the coherence vector. Once the mode tracking fails, the fault hypothesis set, including suspected faults and suspected mode change, is established correspondingly. The degradation behavior of incipient fault is unknown in advanced and the unknown degradation characteristics of each incipient fault can be predicted with some matching dynamic models. Furthermore, the degradation models and incipient faults are identified using a mixed differential evolution(MDE) algorithm. The real-time online faults prognosis of ccbii braking system is realized. Finally, simulation tests validate the efficiency of the proposed scheme.

关键词： fault prognosis ccbii braking system multiple incipient faults mixed differential evolution

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Actuator Fault Detection Based on Robust Adaptive Observer for ccbii braking system 26th

Actuator Fault Detection Based on Robust Adaptive Observer f...

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第26届中国控制与决策会议

作者： Jiandui Yi Zhiwu Huang Weirong Liu Yingze Yang Xiaoyong Zhang Jianfeng Liu School of Information Science and Engineering Central South University Hunan Engineering Laboratory for Advanced Control and Intelligent Automation

ISBN: (纸本)9781479937097

This paper presents a robust adaptive fault estimation design method to solve the problem of actuator fault estimation for ccbii braking system with disturbances and model uncertainties. The proposed robust adaptive fault estimator which is based on an adaptive observer can improve the speed of fault estimation. By transforming the system model into a special coordinate basis（SCB） form, we can structure the desired observer. This transformation can achieve a decoupling between the fault estimates and the disturbances. As a result, the conventional adaptive observer is improved to enhance the speed of fault estimation through this decoupling. Simulation experiments of ccbii braking system are given to validate the effectiveness of the fault detection method.

关键词： Fault Detection and Isolation Actuator Fault Robust Adaptive Observer ccbii braking system

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