Study On Temperature Characteristic Of Single-degree-of-freedom Liquid-floated Gyroscope

The single-degree-of-freedom liquid-floated gyroscope is an important high precision inertial instrument,which is used to measure the attitude angle and angular velocity of the projectile or rocket relative to the inertial space.It is of great significance to master the temperature characteristic of gyroscope as for improving the structure and precision of the instrument.In this paper,the temperature distribution and related laws of gyroscope are obtained by means of simulation analysis and test verification,which lays a foundation for the follow-up improvement work.In this paper the working principle and error model of the instrument are put forward firstly,then the error tree influenced by temperature factors is obtained,it proves the necessity of temperature characteristic.Then the instrument is simulated and analyzed,the simplification of model is done by the modeling software,and the heat transfer path of the instrument is obtained through theoretical analysis,the accurate simulation boundary conditions are gained by test,the temperature distribution and fluid motion state of the gyroscope are calculated through the finite element simulation software.The temperature characteristic verification test of gyroscope is carried out later for the reliability of simulation results.First design the test instrument according to the engineering experience and make the debugging process,then build the test platform by using two-axis turntable and do the experiments,finally prove the simulation results are reasonable and reliable by analyzing a large number of experimental data.At the end of the article,it's analyzed that the influence of the temperature factors on the damping coefficient of the oil and the thermal deformation of conductive hairspring.The research work of this paper is of great significance and practical value to the improvement of instrument precision.