Improving Hybrid Model Reference Sliding Mode Control of a Car Active Suspension System Using Optimum Turn of Sliding Surfaces and Fuzzy Logic

In this paper, with a focus on sliding mode, designing a quarter car active suspension system has been perfomed using model reference strategy and then it has been improved. the aim of designing this system is creating an optimal trade-off between car body displacement and wheels stability on the road, so that during travel, it's favorably safeguarded passengers comfort and car controlability, too. in this paper after introducing sky-hook and ground-hook mathematical models, performance of single and hybrid model reference controllers has been studied and then for improving system behavior, some suggestions such as optimum rotation of sliding surfaces and using fuzzy system for regulating a basic parameter has been mentioned. Simulation results show proposed methods efficiency for improving system performance.