基于悬架效用函数的车身姿态控制

为了研究悬架控制对车身运动姿态的影响,运用八板块假说对整车模型进行分析,提出了构造悬架效用函数的方法,并且给出了基于熵值法优化权值方法,设计出相应的Simulink控制器;以某车型为例建立整车多体动力学模型,进行了脉冲路面和蛇形道路下不同车速工况的SIMPACK/Matlab联合仿真,将基于悬架效用函数优化的模糊控制和现有其他控制方法的悬架减振效果进行了对比分析;理论分析和仿真试验证明,基于悬架效用函数优化的模糊控制是可行的,较好地改善了车辆的平顺性,并能有效抑制车身俯仰和侧倾运动.

Body Posture Control Based on Suspension Utility Function

In order to study the influence of body posture interdependency on suspension control, the model of full vehicle using eight schematic of vehicle plate was analyzed. An approach based on the suspension utility function and a weighted optimization algorithm based on entropy value was presented. A kind of control strategy used in Simulink was designed. Meantime, taking a certain vehicle as an example, a whole multi-body model of vehicle was built. The SIMPACK/Matlab co-simulation in different vehicle speeds under impulse road and snakelike road was tested respectively. Then, the effects of semi-active suspension with fuzzy logical of optimal suspension utility function and other controls were compared. Theoretical analysis and simulation experiment showed that semi-active suspension controlled with fuzzy logical of optimal suspension utility function was practicable. It could improve ride comfort and restrain pitch and roll motion.