Heuristic Fault-Tolerant Multirate Sampling Controller Design for Networked Control Active Suspension System With Probabilistic Time Delay

This article discusses the design challenges of a heuristic static output feedback (SOF) fault-tolerant controller for an active suspension system (ASS) with actuator faults under the disturbance of probabilistic time-varying delays (PTDs) in the networked multirate sampling process. First, considering the impact of uncertainty caused by actuator faults and PTDs during communication transmission on suspension performance, a class of integral quadratic constraint (IQC) operators are constructed to constrain the uncertainty factors. Second, the reconstructed ASS and IQC operator are combined into a feedback interconnect structure (FIS) to handle uncertain disturbances and obtain exponential stability criteria for this FIS. Furthermore, a heuristic SOF fault-tolerant multirate sampled-data control strategy is proposed to handle the disturbance of PTDs on suspension performance in the presence of actuator faults. Ultimately, the controller proposed by the hardware in the loop evaluation effectively reduces the vertical acceleration of the vehicle body while ensuring suspension deflection and tire load, thereby improving passenger comfort.