摘要
针对大惯量、时变负载变频液压调速的低速控制与调速精度问题,将节流调速和矢量变频液压调速有机结合。建立大惯量矢量变频液压复合调速系统;创建系统数学模型,在研究系统的主要影响因素基础上简化数学模型;利用MATLABSIMULINK构建仿真模型并分析系统动态性能。仿真结果表明:矢量变频液压调速速度跟踪精度高,并对转动惯量和负载扰动表现较强的鲁棒性;节流调速增加了液压变频调速的低速稳定性;该复合调速系统获得了理想的调速效果。
To solve the low speed control and speed regulation precision problem of variable frequency hydraulic system with high inertia and time varying load, the VC variable frequency hydraulic speed control and throttle speed governing were adopted. The compound hydraulic system was established, its mathematic model was set up and simplified considering the key factors, and the simulation model was constructed and the model＇s dynamic characteristics were simulated by using SIMULINK toolbox of MATLAB. The simulation analysis indicates that the VC variable frequency hydraulic speed control can track the input signal accurately, is robust to the varying load and high moment of inertia; the throttle speed governing improves low velocity stability; the compound system achieves ideal speed governing performances.
出处
《机床与液压》
北大核心
2009年第9期219-222,226,共5页
Machine Tool & Hydraulics
基金
江苏省自然科学基金项目(BK2006038)
关键词
大惯量
矢量变频液压调速
节流调速
仿真
Great inertia
VC variable frequency hydraulic speed control
Throttle speed governing
Simulation
