无外界动力源主动悬架的能量可用性(英文)

将无外界动力源的主动悬架在半主动模式下吸收平均功率与在主动模式下消耗平均功率的绝对值比作为能量可用性的评价指标,分析了优化PID与LQG控制主动悬架的性能与能量可用性。针对某重型汽车的1/4车主动悬架模型,设计了PID与LQG控制器。当悬架阻尼比为0.1时,以悬架二次型性能指标为目标函数,利用遗传算法对PID控制器参数进行了优化。发现优化PID控制主动悬架的二次型性能指标较LQG控制主动悬架大3.32%,优化PID与LQG控制主动悬架的能量可用性评价指标分别为17.15和226.33。分析结果表明:LQG控制主动悬架的性能略优于优化PID控制主动悬架;2种主动悬架均满足能量可用性要求,且LQG控制主动悬架的能量可用性远优于优化PID控制主动悬架。

Energy availability of active suspension without external energy supply

The absolute ratio of mean power reclaimed in the semi-active control mode divided by the value consumed in the active control mode was proposed as the evaluating index of energy availability for active suspension without external energy supply(ASWEES).The performance and energy availability of ASWEES were analyzed based on optimized PID and LQG controllers,which were designed for a quarter-heavy-vehicle ASWEES.When the damping ratio was 0.1,PID control parameters were optimized by using the genetic algorithm with suspension quadratic performance index taken as the objective function.It is pointed that the suspension quadratic performance index of ASWEES based on optimized PID control is 3.32% bigger than the index based on LQG control,and their energy availability indexes are 17.15 and 226.33 respectively.The result indicates that the performance of ASWEES based on LQG control is weakly better,two ASWEESs meet the demand of energy availability,and the energy availability of ASWEES based on LQG control is strongly better.6 tabs,8 figs,20 refs.