| 柔性接头迟滞阻尼特性识别 |
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| 引用本文： | 郑开发,王超,郝文强,任军学,刘宇,杨敬贤.柔性接头迟滞阻尼特性识别[J].航空动力学报,2017,32(2):486-491. |
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| 作者姓名： | 郑开发 王超 郝文强 任军学 刘宇 杨敬贤 |
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| 作者单位： | 1.北京航空航天大学 宇航学院,北京 100191 |
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| 基金项目： | 上海航天科技创新基金(SAST201258) |
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| 摘 要： | 为实现对柔性接头系统的建模和动力学分析,对柔性接头的迟滞阻尼特性识别方法进行了研究.测试了一系列不同摆角和不同频率条件下柔性接头的动态特性参数,基于变刚度变阻尼法对不同频率下的刚度系数和阻尼系数进行了参数识别,获得了刚度系数和阻尼系数跟摆动频率之间的关系,建立了柔性接头动力学模型.应用该模型分析计算了柔性接头低速频率特性,并与试验结果进行了对比分析.结果表明:建立的模型可以很好地描述柔性接头的低频特性,随摆动频率的增加,恢复力矩略有增加；在振幅较小时,弹性力矩随摆角呈线性,随着摆动振幅的增加,弹性力矩的非线性逐渐增强.
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| 关 键 词： | 柔性接头 迟滞阻尼 参数识别 动力学建模 动态特性 |
| 收稿时间： | 2015/5/21 0:00:00 |
Identification of flexible joint hysteresis damping characteristics |
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| ZHENG Kai-fa,WANG Chao,HAO Wen-qiang,REN Jun-xue,LIU Yu,YANG Jing-xian.Identification of flexible joint hysteresis damping characteristics[J].Journal of Aerospace Power,2017,32(2):486-491. |
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| Authors: | ZHENG Kai-fa WANG Chao HAO Wen-qiang REN Jun-xue LIU Yu YANG Jing-xian |
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| Abstract: | In order to model and analyze the dynamics of flexible joint, the method of identifying flexible joint hysteresis damping characteristics was studied. The dynamic characteristics of flexible joint at different amplitudes and frequencies were tested. The elastic force and damping force at different frequency parameters were identified based on the method of variable stiffness and damping. Therefore the relationships between the frequency and stiffness coefficient and damping coefficient were discovered, and a nonlinear dynamic model of flexible joint was established. The calculated dynamic properties of the amplitude dependence for the joint with the proposed model were compared with experiment. Result shows that a good agreement is obtained and the torque increase a little with the increase of the frequency. Elastic moment is linear with the pendulum angle in the small amplitude, and it gradually becomes nonlinear with the increase of the amplitude. |
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| Keywords: | flexible joint hysteretic damping parameter identification dynamic modeling dynamic characteristics |
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