Study of H_∞ Control in Electronic Control Braking System (ECBS) of an Automobile Moving on the Pavement with Variable Features

The H_∞ control method in electronic control braking system (ECBS) of an automobile moving on the pavement with variable features was presented. According to the characteristics of automobile ECBS adapted to the pavement with variable features, the configuration of ECBS control system with H_∞ robust control was established. The ECBS controller based on the pavement with variable features and slip rate was designed by using the ECBS simplified dynamics model and the mixed-sensitivity optimization method and the robust control tool box in software Matlab. The computer simulation was fulfilled for the ECBS system with H_∞ robust control by using software Matlab/Simulink on one kind of the pavement and different pavements. The results show that it possesses better fundamental braking performance on the pavements with variable features for the automobile equipped with ECBS, in which H_∞ robust control is employed. And it has the advantages of short braking distance and time, small wheel periphery speed and braking smoothly in all braking process.