Guaranteed Cost-Based Fault-Tolerant Controller Design for Nonlinear Suspension Systems

Automotive suspension systems play a critical role in improving the safety and comfort of automobiles. However, the active suspension system may have actuator faults during the actual operation, and to improve the safety of the suspension system, it is necessary in order to carry out fault-tolerant control research on the suspension system. In this paper, a guaranteed cost-based fault-tolerant controller is designed based on actuator failures of nonlinear suspension systems. Based on guaranteeing the suspension performance, the conditions for the asymptotically stable suspension system are given by linear matrix inequality. The controller is achieved by solving the linear matrix inequality function. Finally, the simulation is discussed. Depending on the simulation results, the faulty system can still meet the required performance index under the proposed control algorithm.