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Fuzzy Control of Semi-Active Suspension Based on 7-DOF Tracked Vehicle
Authors:ZHANG Ming-ze  ZHANG Yong-fa
Affiliation:School of Science, Beijing Institute of Technology, Beijing 100081, China
Abstract:On the basis of analyzing the system constitution of tracked vehicle semi-active suspension, which consists of electrorheological (ER) damper and shape memory alloy (SMA) spring, a seven degree of freedom (7-DOF) dynamic model is established. The change of the elasticity of SMA spring and the characteristics of the ER shock absorber are studied. In addition, the study about fuzzy control logic is also carried out. Simulation of a C grade road under random excitations and definite disturbances is performed. Simulation result shows the fuzzy control strategy, which is used in the control of semi-active suspension system with ER damper and SMA springs, is effective, stable and reliable.
Keywords:fuzzy control  electrorheological (ER) damper  shape memory alloy (SMA) spring  semi-active suspension
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