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当前位置: 首页 > 文章 > 液压二次调节加载系统负载干扰的主动抑制 农业机械学报 2008,39 (6) 150-153
Position: Home > Articles > Dynamic Characteristics of Hydrostatic Secondary Control Load Simulation System and the Approach to Resist Load Disturbance Transactions of the Chinese Society for Agricultural Machinery 2008,39 (6) 150-153

液压二次调节加载系统负载干扰的主动抑制

作  者：
胡纪滨;郭晓林;苑士华;彭增雄
单  位：
清华大学汽车工程系;北京理工大学机械与车辆工程学院
关键词：
液压;二次调节;加载系统;动态特性;负载干扰
摘  要：
建立了液压二次调节加载系统仿真模型,通过仿真与试验结果对比,验证了模型的准确性。分析了典型的转速-转矩控制方式液压二次调节加载系统中,转矩变化通过被试件的机械耦合通道所引起的转速波动问题。结果表明,液压二次调节加载系统中并不存在明显的耦合干扰现象,加载元件对输入元件转速的影响主要表现为一种负载干扰。采用结构不变性原理,设计了前馈补偿环节对转速进行了近似补偿,实现了对这种负载干扰的主动抑制。
译  名：
Dynamic Characteristics of Hydrostatic Secondary Control Load Simulation System and the Approach to Resist Load Disturbance
作  者：
Hu Jibin1 Guo Xiaolin2 Yuan Shihua1 Peng Zengxiong1(1.Beijing Institute of Technology,Beijing 100081,China2.Tsinghua University,Beijing 100084,China)
关键词：
Hydrostatic pressure,Secondary control,Load simulation system,Dynamic characteristic,Load disturbance
摘  要：
In order to study the dynamic characteristics of the hydrostatic secondary control load simulation system,the numerical simulation models of secondary unit were given by using MSC.Easy5 software.It is an efficient way to describe state-oriented discontinuities and to facilitate efficient numerical integration of the secondary control systems.The comparative analysis of the results of numerical simulation and test on frequency response characteristic of speed controlled unit demonstrated the simulation models of secondary controlled system were adequately accurate.The speed variation for a jump in torque on a typical test bench where the speed controlled unit was coupling with the torque controlled one via specimen has been discussed.Simulation result showed that the mechanical coupling had little effect on hydrostatic secondary control load simulation system.The speed variation of the speed controlled unit was mainly affected by load disturbance.Depending on the principle of structure invariance,an approximate feed-forward compensator was designed to resist load disturbance and promote the control quality.

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