石英数字加速度计的系统性设计

System Design of Quartz Digital Accelerometer

提出基于材料力学和弹性力学理论的石英数字加速度计(简称加速度计)的支撑结构设计方法,根据加速度计要求的量程和灵敏度指标,能够设计计算出加速度计支撑结构的力转移系数,从而提供可靠的支撑结构模型和整机设计依据;基于机电特性分析建立加速度计的整机CAD(计算机辅助设计)方法,计算加速度计的固有频率和设定电路参数,修正加速度计支撑结构的设计,使加速度计具有在飞行振动和强冲击情况下的环境适应性的同时,具有设计要求的电性能;依据电路匹配网络建立加速度计温度特性补偿仿真设计方法,可有效提高加速度计标度因数的温度特性。上述设计方法构成加速度计的设计系统,经加速度计研制、设计定型和批量生产,验证了设计的合理性和先进性,使得加速度计具有精度高、使用方便、适应性强和易于批生产等特点。

The design method for quartz-digital-accelerometer structure which is based on the materials and elasticity mechanics theory is put forwarded. By the method of the force-transfer coefficient of the supporting structure, the accelerometer can be designed and figured out according to the required range and sensitivity. So that reliable supporting structure model and the complete appliance design criteria are provided. The complete appliance CAD（computer aided design） method of accelerometer based on electromechanical properties analyses is established. The free frequency can be calculated and the circuit parameter are sated by CAD. The design of the supporting structure can be corrected. So the accelerometers have adequacies to flight vibration and strong shock environment, as well as the electrical property designed. According to the circuit matching network, the simulation analyses design method of the accelerometer is founded, which enhances efficiently the scale factor temperature characteristic of the accelerometer. The design systems of accelerometer was formed by the design methods mentioned. Its rationality and advancement are verified by developing design and the batch production of this accelerometer, and the accelerometers have the feature such as high degree of accuracy, user friendly, strong flexibility and easy batch production.