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杠杆放大机构设计对于杠杆放大式双足压电直线电机的性能起决定性作用。该文分析了杠杆放大式双足压电电机的作动机理,建立了基于柔性铰链的杠杆放大机构的动力学模型,对机构放大率进行了理论计算,纵向、横向理论放大率分别为3.12和1.98。利用有限元软件进行仿真分析,理论计算与有限元仿真误差分别为3.1%、14.6%。在此基础上,利用遗传算法对杠杆放大机构柔性铰链结构参数进行优化设计,优化后驱动足纵向、横向位移分别提高了17.6%、8.1%。 相似文献
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The relationship of unstable osmosis coefficient to time and osmosis deep is derived from the osmosis equation in this paper. Mercury porosimeter is used to study the pore structure of cement mortar. The method of volume density is used to determine the changes of specific pore volume, and therelation between pore structure and impermeability is analyzed. Although the drythermal curing method has many advantages over other curing method, the directional pore along the direction of evaporization of water is formed inside concrete. The harmful pore above 2000(?) is increased and the average diameter of pore rises. As a result, the mortar impermeability loses seriously. 相似文献
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苏钊 《军民两用技术与产品》2016,(12)
随着社会的快速发展,中短波发射机的应用也越来越广泛。其不仅能够让信号的传输更加良好,而且还能稳定波的发射频率。但是,在应用发射机的过程中其也会对中短波的发射造成一定的影响。本文主要针对发射机之间的电磁干扰进行分析,并提出了相应的优化措施。 相似文献
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