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为了研究恒功率变量泵控制系统的动态特性,提高变量泵的响应性和稳定性,该文以A11V系列变量柱塞泵为研究对象,建立并分析了变量柱塞泵的动态数学模型,并得出结论:要改善系统应主要增加一阶惯性环节的转折频率。基于AMESim搭建了变量泵主体及恒功率控制机构的物理仿真模型,并进行了台架试验验证,利用AMESim批处理功能探讨了主要参数对响应性和稳定性的影响规律。结合理论及仿真分析,提出了一种结构优化方案,优化后的仿真结果表明:在同等阶跃负载下较原来系统调整时间缩小了41%,超调量由原来的46.1%降到3%,变量泵控制系统响应性和稳定性得到了明显的改善。
In order to study the dynamic characteristics of constant power variable pump control system and improve the responsiveness and stability of variable displacement pump, this paper takes A11V series variable displacement piston pump as the research object, establishes and analyzes the dynamic mathematical model of variable displacement piston pump, The conclusion: to improve the system should mainly increase the first-order inertia of the corner frequency. Based on AMESim, a physical simulation model of variable displacement pump body and constant power control mechanism was set up. A bench test was carried out. The AMESim batch processing function was used to study the influence of the main parameters on the response and stability. Based on the theory and simulation analysis, a structural optimization scheme is proposed. The optimized simulation results show that the system adjustment time is reduced by 41% and the overshoot is reduced from 46.1% to 3% under the same step load. Variable pump control system response and stability has been significantly improved.