基于模型与条件PID补偿的伺服驱动定量泵流量控制  

Flow Control of Servo Drive Constant Pump Based on Model and Conditional PID Compensation

作　　者：贾永峰[1] 

机构地区：[1]陕西交通职业技术学院汽车工程系,陕西西安710018

出　　处：《陕西交通职业技术学院学报》2015年第1期1-6,共6页Journal of Shaanxi College of Communication Technology

基　　金：国家自然科学基金资助项目（51275375）

摘　　要：针对变频异步电机驱动液压源在实际应用中存在响应速度慢、控制精度差、控制参数不易掌握等缺陷，提出永磁伺服电机驱动定量泵液压源的流量控制策略，将永磁伺服电机动态特性好、控制精度高、节能等优点与定量泵结构简单、可靠性好、抗污染能力强等特点相结合，根据定量泵的转速、流量、压力特性关系和油液温度、粘度、弹性模量等相关参数建立电机转速模型控制和条件PID补偿控制，通过较易控制的电机转速信号实现对定量泵输出流量的快速准确调节。仿真结果表明模型控制和条件PID补偿控制的可行性，试验结果证明：模型控制的系统响应接近于电机转速开环控制，大幅领先于涡轮流量计实测流量反馈控制，并且具有很好的抗负载扰动能力。In view of the existing defects of hydraulic source driven by variable frequency induction motor in practical applications such as slow response, low control accuracy and not - easy - to - master control parameters, a flow control strategy of permanent magnet servo motor driven by constant pump hydraulic power unit is proposed in the paper, which combines the merits of permanent magnet servo motor such as good dynamic characteristics, high control precision and saving energy with the characteristics of constant pump such as simple structure, good reliabil- ity and strong anti -pollution, etc. The model control on the motor speed and the conditional proportion, integra- tion, differentiation （PID） compensation are established according to the speed, flow and pressure of constant pump, and the oil temperature, viscosity, elastic modulus and other related parameters, through which the rapidity and accuracy of control on the output flow of constant pump are easily realized. The simulation results show that the model control and the conditional PID compensation control are feasible, and the experimental results show that the response of model control is very close to the motor speed open - loop control, which makes much ahead of the turbine flow meters measured flow feedback control and has good resistance to load disturbance ability.

关 键 词：液压源 伺服驱动 模型控制 条件补偿 流量控制 

分 类 号：TH137[机械工程—机械制造及自动化]