摘要
对比分析了传统负载敏感液压系统与电液流量匹配控制系统的结构及控制特点,建立电液流量匹配控制系统AMEsim仿真模型及系统控制器,采用AMEsim与Matlab/Simulink联合仿真,进行系统特性研究.分析结果表明,电液流量匹配控制系统在流量饱和状态下能够实现与外部负载无关的流量分配,保证执行器复合动作的协调性;与传统LUDV负载敏感系统相比,避免了泵与最大负载之间的预设固定压差,提高系统的节能性;不需变量泵控制机构与最大负载压力反馈回路,简化液压系统结构,改善系统动态响应特性.
In this paper, the structure and control characteristics were comparatively analyzed between the traditional load - sensing hydraulic system and the electro - hydraulic flow matching control sys-tem. The AMEsim model and controller of the electro - hydraulic flow matching control system were established. Research on the system characteristic was carried out based on co - simulation of AMEsim and Matlab/Simulink. Results show that the system improved by flow saturation resistant control can realize proportional flow distribution that is independent of external load and ensure the actuator com- pound action coordinated. Compared with the traditional LUDV load -sensing hydraulic system, the preset stable difference between pump pressure and maximum load pressure is avoided and energy effi-ciency is improved. The displacement control mechanism for variable displacement pump and the closed - loop feedback control of maximum load pressure are not needed. The structure of hydraulic system is simplified and the dynamic characteristic is improved.
出处
《福州大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第2期270-276,共7页
Journal of Fuzhou University(Natural Science Edition)
基金
国家自然科学基金资助项目(51175084)
福建省自然科学基金资助项目(2011J01300)
关键词
电液流量
匹配控制
AMESIM
负载敏感
节能
动态特性
electro - hydraulic flow
matching control
AMESim
load sensing
energy - saving
dy-namic characteristic
