Design of temperature control system of hemispherical resonant gyroscope

Abstract

Thermal drift is a key factor in gyroscope precision. To ensure the output accuracy of the hemispherical resonant gyroscope, a temperature control system for the hemispherical resonant gyroscope has been designed in this article. It provides gyroscope with constant temperature to reduce the influence of temperature and inhibit the thermal drift. This system combines hardware design and software programming. The relay-type self-tuning PID control algorithm is applied so that the design of hemispherical resonant gyroscope temperature control system can be completed.An incubator and a control cabinet has been designed as hardware. A metal tray is placed in the incubator to hold the hemispherical resonant gyroscope. Oil circulate system and data acquisition equipment in the control cabinet play the role of heating, cooling and data acquiring. From the aspect of software, the whole system is programmed by LabVIEW, a visual interface is also developed in the master. The experimental results show that the temperature control system can achieve the expected design effect, and the temperature control accuracy can reach±0.05 ℃.

Keywords

• thermal drift
• hemispherical resonant gyroscope
• pid
• relay feedback method;self-tuning parameter