The Simulation Research On The Superfluid Gyroscope Effect Based On Double Weak-Links Structure

Superfluid gyroscope is a new type of gyroscopes based on cryogenic physics and technology.Especially, the4He superfluid gyroscope has high potential in many respects, such as precision,volume, and environmental requirement. At present, research on the4He superfluid gyroscope ismainly about the physical principles. Therefore, the research on how to develop the4He superfluidgyroscope as a real instrument has great practical significance. The typical gyro model based ondouble weak-links structure is studied in this paper, and the key technologies of it are explored.The working mechanism and detailed mathematical model of this gyro system are studied. Thesimulation proves that the gyro scheme has good gyro effect. The measurement range is analysed, andthe effect method to extract variable input angular velocity information is developed. All of these arethe preparations of theory to develop high precesion and practical gyroscope. The amplitude lockingtechnology is successefully explored to solve the problems of the small range and the judgment ofangular velocity direction. Analysis of the error sources in system with the technology is done.The working mechanism of the gyro system is studied, and the system is made modular. The keyunits are detailed described mathematically, and the mathematical models are established. The driveunit as the premise of the normal work of system is analysed in detail. The general mathematicalmodel of the system is established, and the gyro effect of the system is well proved. The measurementrange and the relationships between the measurement range and the structural parameters are analysedboth in theory and simulation. By adjusting the structure parameters, the measurement range is tinilyexpanded. The methods to extract the input angular velocity information, numerical analysis methodand frequency domain analysis method, are studied when the input angular velocity is changing withtime. Through the comparison of the two methods, the numerical analysis method is chosen.The amplitude locking technology that can solve the problems of the small measurement range andthe judgment of angular velocity direction successefully is studied. The results show that thetechnology can solve the two problems effectively. The measurement range of the system with theamplitude locking technology is analysed, and the new system can detect any input angular velocitywhich changes slowly with time. General analysis of the error sources in the new system is done, suchas displacement sensor noise, gyro interior noise (thermal noise), gyroscope system noise(temperature fluctuations noise and frequency wave noise), and external vibration noise.