静液压传动车辆的复合控制

针对柴油机为动力的静液压传动车辆设计了由两个模糊控制器、一个模糊自适应PI控制器和一个PID控制器组成的复合控制系统，并利用柴油机外特性曲线对柴油机工况进行优化，使柴油机根据静液压系统的功率需求自动进行调速，解决了使用中柴油机过载保护，利用柴油机转速补偿车速和静液压传动系统的时变非线性控制等问题。仿真与试验证明：该复合控制方式提高了以柴油机为动力的静液压传动车辆控制特性和系统匹配性能。

Complex Control of Hydrostatic Transmission Vehicle

A complex controller, consisted of two fuzzy controllers, a fuzzy adaptive PI controller and a PID controller, was designed for hydrostatic transmission system and the diesel engine with the aim of improving the control characteristics of hydrostatic transmission vehicle and optimizing the power of the diesel. Using the control strategy, the diesel can be protected when overload, its speed can be increased to help the pump to achieve the required driving speed when displacement of the pump is already full and can be adjusted according to the power curve to improve the utilization ratio of output power of the diesel. The results of simulation and experiment showed the vehicle can maintain good running performance, the diesel engine and the hydrostatic transmission are coordinated perfectly.