排量、转速复合泵控差动缸系统特性研究

发布时间：2018-03-12 19:16

本文选题：泵控差动缸　切入点：复合控制　出处：《农业机械学报》2017年08期 　论文类型：期刊论文

【摘要】：针对传统泵控差动液压缸系统存在液压回路复杂、响应慢和能耗大的问题,提出了一种排量、转速复合控制方法,用1台伺服变量泵直接控制差动液压缸。首先,从理论上分析了泵控差动缸控制原理,将差动缸复合控制系统分为3个子系统分别进行仿真分析,进一步通过内环排量外环转速进行建模仿真分析,复合控制下响应速度比恒定转速下动态特性好。在此基础上搭建试验台,对泵控差动缸进行试验分析,在内环排量外环转速控制下较恒定转速下差动缸系统动态响应快,时间缩短13.4%;将变量泵处于恒压控制模式下,对伺服电机输入能耗进行测量,在不同转速和负载压力下进行试验,低转速大排量下系统能耗可以减少3 kW左右。通过仿真和试验,结果表明,排量、转速复合控制模式下,可有效提高泵控差动缸系统的响应速度,降低能耗。
[Abstract]:In view of the problems of complex hydraulic circuit, slow response and large energy consumption in the traditional pump-controlled differential hydraulic cylinder system, a compound control method of displacement and rotational speed is proposed, in which a servo variable pump is used to control the differential hydraulic cylinder directly. The control principle of pump controlled differential cylinder is analyzed theoretically. The compound control system of differential cylinder is divided into three subsystems to simulate and analyze separately. The response speed under compound control is better than that under constant rotational speed. On this basis, a test rig is built to test and analyze the pump controlled differential cylinder. The dynamic response of the differential cylinder system is faster under the control of the internal loop displacement and the outer ring speed than the differential cylinder system under the constant rotational speed. When the variable pump is in constant pressure control mode, the input energy consumption of servo motor is measured and tested under different rotational speed and load pressure. The energy consumption of the system can be reduced by about 3 kW under the condition of low speed and large displacement. The results show that the response speed of the pump-controlled differential cylinder system can be improved effectively and the energy consumption can be reduced under the compound control mode of displacement and rotational speed.
【作者单位】：太原理工大学新型传感器与智能控制教育部重点实验室;
【基金】：国家自然科学基金项目(51575374) 山西省自然科学基金项目(2015011056)
【分类号】：TH137

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