The Development Of A Fuzzy Control System For Electro-controlled Air Spring Suspension

The suspension is one of the most important parts of the automobile. The suspension system has important effects on the ride comfort and maneuverable stability of the automobile. In the design and development of the automobile suspension system, the calculation and the analysis of the kinetics and the control strategy has been a very important task.Based on the ADAMS virtual model technology, the paper established the simplified geometric model of the suspension, and studied the effects of the suspension parameters when wheel vibrating. This method provides an efficient and advanced tool for developing suspension system.When the control strategy of the aerial active suspension being researched, a two-degree-of-freedom suspension model is established firstly, and then the application of fuzzy control theory in the aerial active suspension system been discussed. The paper is based on the one-quarter-vehicle model, and the structural parameters are obtained from a certain vehicle. The dynamic model is built up in Matlab +Simulink. Take the sprung body mass's acceleration RMS as control object, and the suspension stroke as a restriction, and then set up the simulation model. Then the stochastic signal been taken as the input of simulation model. Finally, by comparing the acceleration RMSs and the tire's dynamic loads of the two kind of suspension, the paper scales the controller's validity.Through the research of the result, a conclusion been drown that fuzzy control of the aerial active suspension system improve the ride comfort and maneuverable stability greatly of the automobile in this kind of aerial suspension system.