机载智能液压泵的建模与仿真

介绍了机载智能液压泵的结构、工作原理 ,对液压泵变量调节系统进行了数学建模和仿真。结果表明 ,斜盘位移响应的上升时间小于 2 2 ms,超调小于 8%,静态精度小于 0 .7%,变量机构平衡弹簧的最佳预压缩力相当于伺服阀供油压力的 1 /2 ,液压泵排油压力对变量调节响应时间的最大影响为 2 ms,液压油体积弹性模量取值的变化对变量调节没有明显影响 ,但伺服阀的恒定供油压力必须保证。

Modeling and Simulation of Airborne Intelligent Hydraulic Pump

Airborne intelligent hydraulic pump is the pump whose displacement is adjusted based on hydraulic system's real time load for good match of outlet pressure for the load. The pump introduced here is adjusted by single cavity cylinder controlled by double-edge servo valve.Swash plate displacement control system was modeled and simulated following the illustration of configuration and principle of the pump in this paper. Simulation results show 22ms maximum rising time, 8% overshooting and 0.7% static accuracy. In addition, it is proved that optimal preload of balance spring in swash plate control mechanism is equivalent to half of the supply pressure for servo valve, maximum effect of pump output pressure on rising time is 2ms, the effect of evaluation variation of hydraulic oil cubic modulus on the system performance is not obvious, while the proper constant supply pressure for servo valve must be ensured.