摘要
卫星微振动隔振器建模是进一步整星振动仿真、优化和控制的基础。针对五参数分数阶导数模型无法描述液体阻尼式卫星隔振器幅变特性的缺点,根据试验数据,分别对各位移振幅激励下的隔振器的动特性曲线进行参数识别,根据参数识别结果,对五参数分数阶导数模型进行幅值相关性修正,引入幅变因子。由仿真结果与试验结果的对比可知,引入了幅变因子的分数阶导数模型可以很好地预测隔振器的幅变特性。在提出的改进型分数阶导数模型的基础上,进行了模型参数影响分析。所提出的建模方法可为微振动隔振器的设计和分析提供参考。
The modeling of satellite micro-vibration isolators is the basis for further simulation,optimization and control of system vibration. Because the model of five-parameter fractional derivative cannot describe amplitude variable performance of the damping satellite vibration isolator,according to the experimental data,parameter identification of dynamic characteristic curves of isolator under different displacement amplitude excitation was conducted. According to the parameter identification result,the amplitude correlation correction were conducted to five-parameter fractional derivative model,and the amplitude variable factor was introduced. From the comparison between the simulation results and the experimental results,it can be seen that the modified fractional derivative model with amplitude variable factor can well predict the amplitude variable characteristics of the vibration isolator with hydraulic damping. Based on the proposed fractional derivative model,the influence of main model parameters was analyzed. The proposed modeling method can provide reference for the design and analysis of micro-vibration isolators.
作者
刘巧斌
史文库
柯俊
陈志勇
曹飞
闵海涛
LIU Qiaobin;SHI Wenku;KE Jun;CHEN Zhiyong;CAO Fei;MIN Haitao(State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022 , China;Faculty of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou 310018 , China)
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2019年第5期999-1007,共9页
Journal of Beijing University of Aeronautics and Astronautics
基金
国家重点研发计划(2018YFB0106203)
吉林省科技发展计划(20150307034GX)
吉林省重大科技攻关项目(20170204063GX)~~
关键词
微振动
分数阶导数模型
幅变动特性
试验测试
参数影响
micro-vibration
fractional derivative model
amplitude variable dynamic characteristic
experiment test
parameter influence
