Fault Tolerant Control in a Semi-active Suspension^*

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• 作者：Juan C. Tudó ; n-Martí ; nez^* ; ^{jc.tudon.phd.mty@itesm.mx" class="auth_mail" title="E-mail the corresponding author} ; Ruben Morales-Menendez^* ; ^{rmm@itesm.mx" class="auth_mail" title="E-mail the corresponding author} ; Ricardo Ramí ; rez-Mendoza^* ; ^{ricardo.ramirez@itesm.mx" class="auth_mail" title="E-mail the corresponding author} ; Olivier Sename^** ; ^{olivier.sename@gipsa-lab.grenoble-inp.fr" class="auth_mail" title="E-mail the corresponding author} ; Luc Dugard^** ; ^{luc.dugard@gipsa-lab.grenoble-inp.fr" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Fault-tolerant control ; Fault diagnosis ; Sensor faults ; Semi-active suspension ; Automotive control
• 刊名：IFAC-PapersOnLine
• 出版年：2012
• 出版时间：January 2012
• 年：2012
• 卷：45
• 期：20
• 页码：1173-1178
• 全文大小：1973 K

文摘

A Fault Tolerant Control System (FTCS) in a Quarter of Vehicle (QoV) model is proposed. The control law is time-varying using a Linear Parameter-Varying (LPV) based controller, which includes two scheduling parameters. One parameter for monitoring the nonlinear behavior of the damper, and another for fault accommodation using a reference model obtained by a state observer of the normal operating regime. The QoV model represents a semi-active suspension, including an experimental magneto-rheological damper model. The FTCS is analyzed when the velocity sensor fails abruptly and the QoV model is susceptible to disturbances in the road profile. Simulation results show the effectiveness of the FTCS in terms of vehicle comfort, suspension deflection and road holding in comparison with a conventional LPV based control system. In the FTCS, the comfort index based on the power spectral density is within the desirable bound (1.8) in all range of frequencies, once the sensor fault has occurred; while, the conventional control system deteriorates the comfort 54 %, specially at low frequencies (0-4 Hz). Additionally, the FTCS improves the road holding and suspension deflection indexes, 33% and 39% respectively, when the fault accommodation is considered.