基于有限元的微型二维力传感器设计及贴装优化

The Design of Two-dimensional Force Sensor and the Optimization of its Placement Based on Finite Element Method

为了实现导弹在飞行过程中空间力的测量,运用有限元的方法实现了对一种新型多维力传感器的设计,选用E型圆膜片式结构作为多维力传感器的弹性体,运用ANSYS建立弹性体的有限元模型,并进行了网格划分。根据传感器的实际工况进行了二维力传感器的静力学分析,通过分析得到了弹性体的应变特性,根据应变特性确定了二维力传感器的组桥和贴片方式,并对二维力传感器进行了模态分析,得到了二维力传感器的动态性能指标和工作带宽,基于有限元分析完成了对二维力传感器的研制和设计。

A new type of multi-dimensional force sensor is designed based on Finite Element Method （FEM） to measure the space force in the flight process of the missile. The new sensor selects an elastomer which is a circular membrane in E-type structure. According to the actual working condition of the sensor, a static analysis of two-dimensional force sensor is established through building finite element model of elastower and meshing by ANSYS. The strain characteristic of the elastomer is obtained by FEM analysis, and a scheme of strain-measuring bridge and mount for two-dimensional force sensor is determined by strain characteristic. The dynamic performance index and work bandwidth of the sensor is obtained by modal analysis of the two-drmensional force sensor. The design and development of two- dimensional force sensor based on finite element analysis is completed eventually.