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阀控非对称缸频域建模 预览 被引量:20

MODELING IN FREQUENCY DOMAIN FOR VALVE CONTROLLED ASYMMETRIC HYDRAULIC CYLINDERS
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摘要 指出阀控非对称缸的动态响应是其正反向油路遵循系统结构特征决定的某种规律交替作用的结果。针对以往频域建模时不考虑结构因素影响,利用负载压力和负载流量定义实现模型整合的不足,提出阀控缸的统一频域模型——分段传递函数,该函数包含两个对应正反向油路的子函数。对于对称缸,两个子函数具有完全相同的结构和参数;对于非对称缸,两个子函数的速度放大系数Kv1和Kv2不等,其模型整合可归结为Kv1和Kv2的整合。在传递函数结构参数和响应曲线形态分析的基础上,借助数字仿真,探讨典型系统模型整合算法与系统阻尼比磊及衰减比古的关系,提出变量整合、参数整合的概念和方法,给出通过分段传递函数整合获得等效传递函数的建模方案。对常规液压伺服系统,等效传递函数的阶跃响应与数字仿真基本吻合,与以往模型相比精度明显改善。 It is pointed out that the transient response of a valve-controlled asymmetric hydraulic cylinder is the result of the alternate action of its oil circuits in positive and negative directions in accordance with the principal on the structural characteristic of the system. In view of the defects of the old modeling manner in which the models is incorporated via the definition of load pressure and load rate of flow without thinking of the effects of the system structure on the models, a segmental transfer function is presented as a unified frequency domain model for valve-controlled cylinder. This function consists of two sub-functions corresponding respectively to the two oil circuits mentioned above. For a symmetric hydraulic cylinder, the two sub-functions equate each other both in structure and in parameters; For an asymmetric hydraulic cylinder, the sub-functions aren't identical in their speed amplification ratio Kv1 and Kv2, the functions can be incorporated via the incorporation of Kv1 and Kv2. Based on analysis of the structural parameters and of the configuration of response curve of transfer functions, the relationship between the incorporation arithmetic of the models and the damp, attenuation ratio of system is studied by means of digital simulation with a series of typical systems. A concept and method of variable-incorporation and parameter-incorporation is presented, and then a plan is put forward with which an equivalent transfer function can be obtained via incorporation of the segmental transfer function. The step response of the equivalent function quite coincides against that of digital simulation for normal hydraulic servo systems. The subjected models are evidently more accurate than the previous one.
作者 吕云嵩 LO Yunsong (Mechanical Department, Nanjing Institute of Technology, Nanfing 211167)
出处 《机械工程学报》 EI CAS CSCD 北大核心 2007年第9期 122-126,共5页 Journal of Mechanical Engineering
基金 江苏省高校自然科学基金资助项目(05kjb460037)
关键词 非对称缸 建模 液压 频域分析 Asymmetric-cylinder Modeling Hydraulic pressure Analysis of frequency domain
作者简介 吕云嵩,男,1957年出生,高级工程师,副教授。主要从事流体控制与节能技术等方面的研究。发表论文10余篇,获得专利1项。E-mail:jhwu@njut.edu.cn
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  • 1范晓英,陆培新.一个新型的模糊控制器[J].控制理论与应用,1995,12(5):597-602. 被引量:12
  • 2李长春.数字式电液伺服系统的控制算法研究及电子控制器研究:博士学位论文[M].哈尔滨:哈尔滨工业大学出版社,1998.. 被引量:1
  • 3王勇 熊晓红 等.-[J].机器工程学报,1998,34(4):102-105. 被引量:1
  • 4[4]Watton J. A digital compensator design for electro-hydraulic single-Rod cylinder position control systems. Journal of Dynamic Systems, Measurements, and Control. Transactions of the ASME,1990,112:403~409 被引量:1
  • 5[5]Yao B, Bu F, Reedy J. Adaptive robust motion control of single-rod hydraulic actuators:theory and experiments. IEEE/ASME Transactions on Mechatronics, 2000,5(1):79~91 被引量:1
  • 6[6]He S, Sepehri N. Modeling and prediction of hydraulic servo actuators with neural networks. In:Proceedings of the American Control Conference. San Diego, California, 1999:3 708~3 712 被引量:1
  • 7李长春,博士学位论文,1998年 被引量:1
  • 8王占林 裘丽华.非对称液压缸伺服系统的理论研究[J].机床与液压,1987,. 被引量:6
  • 9薛定宇.控制系统计算机辅助设计MATLAB语言及仿真[M].北京:清华大学出版社,2001.. 被引量:3
  • 10刘长年.非对称伺服油缸的动态研究[J].机床与液压,1985,(1). 被引量:8

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