Design Method for High Temperature Stability Thermal Control of Remote Sensor

The high precision thermal control of remote sensor is an important condition for ensuring the imaging quality, achieving long life and reliability of the remote sensor. To ensure the imaging quality and pointing accuracy in orbit, the main components of the remote sensor need to maintain high temperature stability throughout its entire life cycle. With the improvement of the resolution ratio of remote sensor, the optical tolerance is further tightened, and the requirements for thermal stability in optical and mechanical system are further improved. The article proposed a thermal control design method to improve temperature stability under the constraints of limited allocation weight and power resources. The idea of integrated external suppression with inside thermal precision control is adopted. The methods include changing the time of the descending point, optimizing working modes, using camera’s door, increase the temperature control threshold of the main structure. Through thermal simulation calculation and in orbit flight verification, the main components of the remote sensor can maintain temperature stability of the ± 0.2℃ throughout its entire life cycle. It is indicating that the method can improve the temperature stability, beneficial for ensuring high-quality imaging of the remote sensor and can be applied to high-precision and high stability temperature control design of future remote sensors.