Abstract: Due to the mismatch between the active suspension system energy consumption and the engine power thus causing the fluctuations of pressure and flow in the hydraulic active suspension systems, and the engine over loaded even flameout, an active suspension system energy consumption and engine power matching control schemes was proposed herein. The conditions of ensuring stable operations of the engine and the active suspension systems were analyzed. In order to make the maximum power of the active suspension system less than the residual power of the engine in the current states, a control strategy of compensate the variable pump discharge control signals was proposed according to the average flow consumed by the active suspension systems. The fuzzy PID control methods were applied to design the power matching controller. The test results show that compared with the original active suspension systems, the average power consumption of the active suspension systems appied the proposed control schemes is reduced by 42%, the average torque percentage is reduced by 39.6%. The energy consumption of the active suspension systems and engine load are significantly reduced.

Key words: emergency rescue vehicle, active suspension, power matching, engine, fuzzy PID control

摘要： 针对主动悬挂系统能耗与发动机运行参数不匹配而导致的液压主动悬挂系统压力和流量频繁波动、发动机载荷过高导致熄火等问题，提出了主动悬挂系统能耗与发动机功率匹配的控制方案。分析了保证主动悬挂系统与发动机匹配运行的条件,为使主动悬挂系统运行的最大功率小于发动机当前状态下的剩余功率，提出了根据驱动主动悬挂系统的平均流量对变量泵排量控制信号进行动态补偿的控制策略，应用模糊PID控制方法设计了功率匹配控制器。试验结果表明：相较于原主动悬挂系统，应用所提出控制方案的主动悬挂系统所消耗的平均功率降低了42%，发动机扭矩百分比平均值下降了39.6%，主动悬挂系统能耗和发动机载荷明显减小。

关键词: 应急救援车辆, 主动悬挂, 功率匹配, 发动机, 模糊PID控制