Effect of acceleration on the internal fluid characteristics of liquid floated gyro

Abstract Under the inhomogeneous temperature field, the fluid flow caused by the inertia force in the liquid floated gyro will produce a viscous interference torque, which has become a bottleneck restricting the accuracy improvement of the liquid floated gyro. However, the influence factors and action mechanism of this torque are not clear, and it is often analyzed as a zero-order error. In order to investigate the influence of acceleration on the internal fluid characteristics of gyro, the coupling model of temperature field and flow field for the gyro is established in this paper. On this basis, the temperature field, flow field and interference torque under different acceleration conditions are calculated quantitatively. The results show that the acceleration has no obvious influence on the temperature distribution of the gyro, but it has a greater influence on the oil flow state and the viscous interference torque. When the acceleration direction is along the motor axis and output axis, the corresponding value of interference torque is the maximum and minimum respectively. This work will provide a theoretical guidance for the accuracy improvement of liquid floated gyros.