航天高压高速天地功率分档变量柱塞泵建模与仿真

Modeling and Simulation of an Aerospace High Pressure and High Speed Flight-Ground Power Shifting Variable Displacement Axial Piston Pump

航天高压高速天地功率分档变量泵(简称分档变量泵)具有功率分档和恒压变量的特点,为了更加准确地分析其特性,得到优化改进的方向。介绍分析了其工作原理,推导数学模型,使用AMESim、MATLAB软件构建了整泵的联合仿真模型,对静态和动态性能进行了仿真,并与试验数据进行对比分析,得到了参数优化设计结果。该模型可为其他同类型泵的优化设计提供快速原型和理论支撑。仿真分析证明该型泵设计合理,功率分档和恒压变量功能可以正确实现,预升压角、阻尼孔直径需要进一步优化。

The aerospace high pressure and high speed flight-ground power shifting variable displacement axial piston pump(hereinafter referred to multistage variable displacement pump)is characterized by the multistage power and the constant pressure variable displacement.Its operation principle is introduced and analyzed.With the mathematical model derived,an AMESim-Simulink union simulation model of the whole pump is constructed.The optimal design parameters are obtained based on the comparison of static and dynamic performance of simulation and experiment.The model can provide a rapid prototype and a theoretical support for the design optimization of similar pumps.The conclusion is obtained that the design of the pump is reasonable,the functions of multistage power and the constant pressure variable displacement can be realized correctly,and the pre-boost angle and the diameter of the damping hole need to be further optimized.