Temperature field analysis and optimization design of the dithered ring laser gyroscope in strapdown inertial...

The dithered ring laser gyroscope (DRLG), an ideal component for strapdown inertial navigation systems, is widely applied in fields such as aviation and aerospace due to its high precision and stability. However, uneven internal heat distribution and fluctuations in external environmental temperature can induce temperature field variations, thereby affecting its output accuracy and reliability. This study thoroughly analyzes the impact of the temperature field on DRLG output performance. Through finite element simulations and temperature testing experiments, we determine the temperature field distribution under various environmental conditions and validate the effect of temperature changes on gyroscope thermal deformation. To enhance the stability of the DRLG in complex environments, an optimized parametric design of a three-point mounted dither mechanism is proposed, and its effectiveness under extreme temperature conditions is verified through simulations and experiments. Results indicate that the optimized design significantly reduces thermal deformation and zero-bias error induced by temperature changes, improving thermal and zero-bias stability, thereby providing theoretical support and engineering solutions for high-precision inertial navigation systems.