Hybrid Control Method of the Integrated System of Electromagnetic and Friction Braking of Car

doi:10.3901/JME.2016.12.118

Abstract

Abstract: In allusion to the problem that the integrated electromagnetic and friction braking system in the process of braking mode switches existed hybrid dynamic characteristics, based on the mathematical models of integrated electromagnetic and friction braking system, its hybrid Petri net models are established. By using common Lyapunov function method the stability of the integrated braking system in the process of braking mode switches is analyzed and the basic and improved algorithms of dynamic coordination control for braking mode switches are put forward. Some conclusions are obtained asIn the process of braking mode switches controlling the longitudinal slip ratio of wheel which makes it always lower than the optimal slip ratio of road can fully guarantee the stability of the integrated electromagnetic and friction braking system. For the control performance of electromagnetic brake is better than electronic hydraulic brake, the electronic hydraulic brake is mainly used to provide a certain amount of braking intensity while electromagnetic brake is used to meet the driver’s braking intention in the process of the coordination control of electromagnetic brake and electronic hydraulic brake. At the same time, it also significantly reduces the use of the high speed solenoid valve and improves the reliability of the electronic hydraulic brake system.

Key words: automotive engineering, hybrid system, integrated brake, stability analysis, switching control

CLC Number:

U463

HE Ren, HU Donghai. Hybrid Control Method of the Integrated System of Electromagnetic and Friction Braking of Car[J]. Journal of Mechanical Engineering, 2016, 52(12): 118-128.

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