| Driving comfort and vehicle handling and stability of these two indicators and the car suspension system has a close relationship. The structure of the traditional passive suspension parameters can not be with the external conditions change, thus limiting the further improvement of vehicle performance, while the semi-active suspension structure parameters such as damping, spring stiffness and so can change with external conditions change, so they can better meet the performance requirements of vehicles. At the same time, compared with the active suspension, its simple structure, low cost, so by the majority of vehicle engineering extensive attention.Control strategy design as a semi-active suspension control technology throughout the core, on the suspension characteristics important. Of this paper, the characteristics of vehicle suspension systems, fuzzy control theory is used in semi-active suspension control, analyze the control performance.In this paper, damping control of the seven degrees of freedom vehicle suspension model, proposed and designed a new fuzzy controller, that is, three-dimensional fuzzy controller. First use of Matlab / Simulink to establish 1 / 4 passive suspension model, based on this acceleration and its change rate of input to two-dimensional fuzzy controller, fuzzy controller based on the increase in vehicle speed the development of its input three-dimensional fuzzy controller, while increasing the language of the corresponding rules and modify its weight coefficient, finally puts the simulation, by comparing the suspension performance index, that is the body acceleration, three-dimensional fuzzy controller was shown to contractors to sit in Tigaocheliang comfort and reduce the dynamic tire load than the two-dimensional fuzzy controller is more effective. Finally, genetic algorithm control of the membership function of fuzzy control rules and optimized, so that semi-active suspension to improve the performance of suspension...
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