差动式微力加载装置的结构设计与优化

摘要

In order to solve the stable load in the calibration system of micro -force, it designs a vertical micro -force loading device based on flexible hinge , which has constant thickness , symmetry and differential type .It in-troduces the device's working principle and balance .Based on the separately analysis of each structural parame-ter , it selects a set of parameters used in the orthogonal test and the extreme difference analysis , obtains the pri-mary and secondary relationship of the structure parameters that affect the output of micro -force and relatively better parameter combinations of the structure .Finally, it analyzes the different loads of the model , provides the relatively better parameter combinations .The results show that the improved micro -force loading device can be stably loaded micro-level precision force and have a good linear relationship .%为了在微力标定系统中实现微力稳定加载，设计了一种基于柔性铰链的等厚度对称差动式垂直微力加载装置。首先对装置的工作原理以及平衡性做了详细介绍；然后在对装置结构参数进行单因素分析后，选取一组参数进行正交试验及极差分析，得出结构参数对输出微力影响的主次关系和装置的较优参数组合；最后，对优化后的模型进行不同载荷分析，结果表明优化后的微力加载装置能够稳定地加载微力且具有良好的线性关系。