高频电液角振动测试台的系统设计与关键问题研究

发布时间：2018-03-04 04:36

  本文选题：高频电液角振动测试台　切入点：多目标优化　出处：《哈尔滨工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：电液角振动测试台是标定捷联惯性组合和进行器件角振动测试必不可少的设备。与电动角振动测试台相比,具有出力大、抗偏载能力强和结构紧凑等优点。随着科技的不断进步,低频电液角振动测试台已经远远不能满足人们的使用需求,在这种情况下,高频电液角振动测试台的研究变得十分迫切。影响电液角振动测试台频响的因素有很多,例如液压动力结构的设计、伺服阀的带宽、元件的选型、振动控制算法以及软件实现等。首先围绕高频电液角振动测试台这一研究对象展开了研究,完成了电液角振动测试台的总体方案设计以及关键零件与泵站的设计与选型,输出了相关工程图纸,针对重要零部件进行了静力分析与模态分析。针对高频电液角振动测试台设备的特殊性,引入精细化的模态分析,并分析了轴承预紧力和油液弹性模量对于系统固有频率的影响。其次比较了两种角振动测试台叶片轴的结构形式与特点,建立了角振动测试台液压固有频率与结构谐振频率关于叶片轴结构参数的数学模型。针对液压固有频率与结构谐振频率进行了叶片轴的单目标优化,并在单目标优化的基础上,建立了多目标优化函数,然后将寻优结果极佳的蜂群算法引入角振动测试台叶片轴的结构参数多目标优化中,最终优化了叶片轴的五个结构参数。最后建立了考虑叶片轴结构柔性的角振动测试台系统仿真模型,得出电液角振动测试台系统的闭环Bode图。搭建了电液角振动测试台试验台,进行了系统正弦扫频实验,辨识出系统的闭环Bode图,得出了角振动测试台系统的液压固有频率与结构谐振频率,验证了前期系统方案设计与模态分析的正确性。
[Abstract]:The electro-hydraulic angular vibration test bench is an indispensable equipment for calibrating strapdown inertial assembly and for measuring the angular vibration of devices. With the development of science and technology, the low frequency electro-hydraulic angle vibration test bench is far from being able to meet the needs of people, in this case, The research of high frequency electro-hydraulic angle vibration test bench has become very urgent. There are many factors that influence the frequency response of electro-hydraulic angle vibration test table, such as the design of hydraulic power structure, the bandwidth of servo valve, the selection of components, etc. First of all, the research is carried out around the research object of high frequency electro-hydraulic angle vibration test table. The overall scheme design of the electro-hydraulic angle vibration test table and the design and selection of the key parts and pumping station are completed. According to the particularity of the equipment of high frequency electro-hydraulic angle vibration test bench, the fine modal analysis is introduced, and the relevant engineering drawings are outputted, and the static analysis and modal analysis are carried out for the important parts. The influence of bearing preloading force and oil elastic modulus on the natural frequency of the system is analyzed. Secondly, the structure and characteristics of vane shaft of two kinds of angular vibration test table are compared. The mathematical model of hydraulic inherent frequency and structural resonance frequency of angular vibration test table is established. The single objective optimization of blade shaft is carried out according to hydraulic inherent frequency and structural resonance frequency, and on the basis of single objective optimization, The multi-objective optimization function is established, and then the beecolony algorithm with excellent optimization results is introduced into the multi-objective optimization of the structural parameters of the blade shaft of the angular vibration test table. Finally, the five structural parameters of the blade shaft are optimized. Finally, the simulation model of the angular vibration test-bed system considering the flexibility of the blade shaft structure is established, and the closed-loop Bode diagram of the electro-hydraulic angular vibration test bench system is obtained. The system sinusoidal sweep experiment was carried out, the closed-loop Bode diagram of the system was identified, and the hydraulic inherent frequency and the structural resonance frequency of the angular vibration test bench system were obtained, which verified the correctness of the previous system scheme design and modal analysis.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB534.2
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本文编号：1564177