基于结构设计的陀螺加速度计温度系数补偿方法

Aiming at the obvious influence of internal temperature variation on instrument performance of liquid floating gyro accelerometer, instrument error is reduced by reducing the linear coefficient of temperature coefficient. Firstly, the action mechanism and calculation method of the temperature coefficient of liquid floated gyro accelerometer are analyzed, and a temperature coefficient compensation method based on structural design is proposed. A certain amount of volume is removed from the float structure, the distance from the mass center to the center, and the distance from the floating center to the center are adjusted, so that the buoyancy generated by the oil slick changes with the temperature, and the mismatch between the pendulum temperature change rate and the angular momentum temperature change rate of the instrument is compensated. Secondly, the compensation design of float structure of a gyro accelerometer is carried out, and the temperature coefficient before and after compensation is verified by experiments. The temperature coefficient decreases from -1.04×10^-5/℃ (before compensation) to 9.39×10^-7/℃ (after compensation). The experimental results show that the temperature coefficient can be reduced by one order of magnitude by using the method of structural design to compensate the temperature coefficient under the same temperature control accuracy, which has a certain engineering application value for the improvement of the precision of the liquid floating gyro accelerometer..