摘要
分析了工程起重机伸缩臂控制回路的结构和工作原理,通过电磁阀的切换,实现两个液压缸的交替动作,并由液控平衡阀保证液压缸负重缩进时的稳定性。应用键合图理论,建立了液压缸伸出和缩进两个工况的键合图模型。选取容性元件和惯性元件上自变量的积分作为状态变量,推导出伸缩臂控制回路的状态方程,从而建立了动态模型,得出系统的动态特性。利用MATLAB对系统进行数值仿真,研究响应对整个系统的影响。
The structure and operating principles of crane telescopic boom control circuit were dis cussed. Alternating motions of the two hydro-cylinders were fulfilled by solenoid valve＇s switching, and the stability of hydro-cylinders in burdened retraction was guaranteed by hydraulic pressure con trolled balanced valve. With the theory of bond graph, the bond graph models of extension mode and retraction mode were established. Independent variable＇s integrations of capacitive element and inertial element were selected as state variables and state equations of telescopic boom control circuit were deduced. Then the dynamic model is presented and the dynamic characteristics of the circuit are known. Matlab was used to simulate and analyze the results of response to the circuit.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2006年第23期2457-2460,共4页
China Mechanical Engineering
关键词
起重机
伸缩臂控制回路
键合图
动态模型
crane
telescopic boom control circuit
bond graph
dynamic model
