Research Of Gyroscope Drift Inspect System

Gyroscope is indispensable in the control systems and inertial navigation systems on the carriers, such as the plane,the missile,the ship ect. With the development of navigation and aviation, the demand for the control of the carrier and the precision of navigation is becoming higher and higher. So the drift error of gyro is always the main source of error in the control and navigation system,the study of technology of measurement and compensation plays more and more important part in this field.A brief introduction of gyro's development process and conception of drift is presented on the paper. Then the gyro's working theory and cause of drift are summarized. The static drift error and dynamic test error of liquid floated reactive rate gyro are analyzed also. Its static error is categorized into three types: irrelative with the specific force,relative with the first-order of specific force and relative with the square of specific force. Mathematic expressions of static drift error and dynamic test error are formulated. And the basically methods of gyro's drift testing are introduced. The characteristics of force feedback method and servo turntable method are clarified. And the basic principle and method of feedback are emphasized.The design of force feedback loop is emphasized on the base of theory analysis.Then proportional-integral controller and lag-lead compensator are designed to improve dynamic performance of this kind of gyro. The main work includes optimizing parameters and system simulation. The DC power is designed to meet the demand of navigation system for supply power ripple,and the stability of power is proved by analyzing the collection date.The software system of gyro drift testing is introduced and it is carried out by VB finally. The flow chart is presented. Each function module and how to carry out are introduced.