Application of self-adjustable fuzzy control algorithm in the air suspension of the vehicle

The vehicles air suspension system has highly the misalignment, the multi-degrees-of-freedom and time-variable and so on characteristics. There are many uncertain factors when it is controlled. The fuzzy control strategy does not need to establish controlled system´s mathematical model, especially is suitable for the processing uncertainty, the misalignment, the time-dependent system. Usually as soon as the fuzzy controller´s quantification factor and the proportionality factor pass through the determination, in the entire controlled process fixed invariable. Thus, it is very difficult to regard the complicated system to obtain the good control effect. In order to enable the air suspension control system with a certain degree of adaptive capacity, the parameter-self-adjustable fuzzy control arithmetic is adopted According to the fuzzy controller input value´s size, the online adjustment quantification factor and the proportionality factor adapt the controlled plant change, thus the improvement system´s dynamic property and the stable state precision, improve system´s control quality. The test results indicated that the performance indicators of the vehicle have improved.