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为了合理匹配LQG控制无外界动力源主动悬架的蓄能器充气压力、最高工作压力与容积等参数,以满足95.4%工作需求,选取理想控制力标准差的2倍为主动悬架的最大输出力,结合馈能/主动油缸参数确定蓄能器的理想工作压力;以压力波动小于5%为目标,确定蓄能器的充气压力和最高工作压力;推导了悬架与蓄能器间的能量流动方程,并在增加2kW负载条件下进行变容积参数的动态仿真,确定蓄能器的容积。计算结果表明:蓄能器理想工作压力为23.008MPa时,悬架二次型性能指标仅较理想状态增大5.21%;蓄能器的充气压力、最高工作压力与容积分别为11.108、23.583MPa与2.5L,此时LQG控制无外界动力源主动悬架稳定工作时蓄能器的最大压力波动为1.03%。可见蓄能器参数匹配结果同时满足无外界动力源主动悬架的低成本、高性能及高能量回收率的要求。
In order to reasonably match LQG control parameters such as accumulator inflation pressure, maximum working pressure and volume without external power source active suspension to meet the needs of 95.4% of the work, select the maximum output of the active suspension which is twice the standard deviation of the ideal control force The pressure of the accumulator can be determined by combining the feed-in / drive-out cylinder parameters. The pressure and the maximum working pressure of the accumulator are determined with the pressure fluctuation less than 5% as the target. The energy between the suspension and the accumulator Flow equation and dynamic simulation of variable volume parameters under the condition of adding 2kW load to determine the volume of accumulator. The calculation results show that when the ideal working pressure of the accumulator is 23.008MPa, the secondary performance index of the suspension increases only 5.21% compared with the ideal state. The inflation pressure, maximum working pressure and volume of the accumulator are 11.108, 23.583MPa and 2.5L. At this moment, the maximum pressure fluctuation of accumulator is 1.03% when LQG control without external power source active suspension. Visible accumulator parameter matching results while meeting the requirements of low cost, high performance and high energy recovery rate without external power source active suspension.