Gyrorotor Centroid Position Precise Adjustment And Experimental Research

With the rapid development of science and technology in our country, gyroscope as an important part of a spacecraft attitude judgments are widely used in aviation, aerospace and other fields. Because the gyroscope applications are more special, high reliability and high stability has always been the focus of scientists. The accuracy requirement of gyroscope and the processing cost is higher, corresponding process is difficult. As the core component of gyroscope, gyro rotor speed up to ten thousand rpm, under such a high speed, the requirement of rotor dynamic balance is higher. The dynamic balancing adjustment of a type of gyro rotor is mainly through artificial done manually, the adjusting process fully relies on the worker’s experience, and efficiency is relatively low. Therefore, it has a very important practical significance to design a gyro rotor dynamic balancing adjustment device, in order to reduce artificial factors in the process of adjustment.In this paper, the centroid translation method based on the structural feature of a type gyro is used to design the gyro rotor dynamic balancing adjustment device. Modular design method is adopted in the design process of the device which is divided into four parts: gyroscope clamping module, rotor adjustment module, mobile measurement module, visual alignment module. The gyroscope clamping module is used to hold and adjust the relative position of the gyroscope rotor. The rotor adjustment module changes the relative displacement between gyro and gyro housing by adjusting screws. The rotor mobile measurement module can measure the relative displacement of the gyro and the gyro housing and promptly deliver measurement data to the computer. Visual alignment module is able to accurately collect the image of target threaded holes and feedback to the computer. The control system based on Lab VIEW connects the four separated modules closely. According to the adjusting device hardware features and characteristics of the actual use of the adjusting device the control circuitry is designed.Because the beating amount of screw is larger in the original design, it is difficult to make the adjusting screw accurately into thread hole. The causes of this phenomenon are analyzed and the adjustment screw structure is optimized to ensure the adjustment screw insert into the adjusting screw holes smoothly. The CCD camera of the vision alignment module is calibrated by micrometer and the center coordinates of the target threaded hole is identified. The measurement precision of displacement sensor is tested by the micro-bench. It is proved by experiment that gyroscope tooling doesn’t affect the adjusted results in the centroid position adjustment process.With the gyro rotor balancing adjustment experiment in one direction, the balancing adjustment theory of Gyroscope rotor was explored. The mathematical relationship model was preliminary established between the adjusted amount of displacement and the gyro rotor unbalance. Analyze factors that affecting the dynamic balancing adjustment of gyro rotor, and make recommendations for the next stage of work.