| 电液伺服随机振动控制系统非线性建模与仿真 |
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| 引用本文： | 付波,谢安桓,赵春宇,周华.电液伺服随机振动控制系统非线性建模与仿真[J].北京理工大学学报,2020,40(5):491-495. |
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| 作者姓名： | 付波 谢安桓 赵春宇 周华 |
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| 作者单位： | 1. 浙江大学 流体动力与机电系统国家重点实验室, 浙江 杭州 310027; |
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| 摘 要： | 为准确再现5~500 Hz频宽范围参考加速度功率谱密度，针对电液伺服随机振动控制系统，建立了其非线性数学模型.考虑压力流量特性和伺服阀控制死区的影响，状态依赖Riccati方程技术被引入来获得系统变增益状态反馈，拓展了系统频宽；同时结合功率谱密度均衡方法，在频域上对输入信号进行了修正.通过Simulink仿真分析可知，功率谱密度稳定波动范围在±1 dB以内.
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| 关 键 词： | 电液伺服控制系统 随机振动 加速度 功率谱密度 |
| 收稿时间： | 2018/11/15 0:00:00 |
Nonlinear Modeling and Simulation on Electro-Hydraulic Servo Systems with Stochastic Vibration Control |
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| FU Bo,XIE An-huan,ZHAO Chun-yu,ZHOU Hua.Nonlinear Modeling and Simulation on Electro-Hydraulic Servo Systems with Stochastic Vibration Control[J].Journal of Beijing Institute of Technology(Natural Science Edition),2020,40(5):491-495. |
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| Authors: | FU Bo XIE An-huan ZHAO Chun-yu ZHOU Hua |
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| Affiliation: | 1. State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou, Zhejiang 310027, China;2. Zhijiang Lab, Hangzhou, Zhejiang 311121, China |
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| Abstract: | A nonlinear mathematical model was established on electro-hydraulic servo system with stochastic vibration control in order to reproduce reference acceleration power spectrum density (PSD) of 5~500 Hz frequency range accurately. The state dependent riccati equation(SDRE) technology was introduced to acquire system state feedback of variable gain and expand system bandwidth, considering the influence of pressure flow characteristic and servo valve control dead zone. Meanwhile the PSD equalization method was applied to modify the input signal in the frequency domain. According to the analysis in Simulink, the steady fluctuation range of PSD is within±1 dB. |
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| Keywords: | electro-hydraulic servo control system stochastic vibration acceleration power spectrum density(PSD) |
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