Investigation Of Unmanned Combat Platform Inertial Stability Control Based On Open-loop Fiber Optic Gyroscope

Stability of inertial motion platform is the core of unmanned combat system. Thus inertial attitude of the moving platform stability control is the basis for the development of all types of unmanned combat systems. The study on unmanned combat platform inertial stabilization has great significance. The thesis focuses on the common key technologies of unmanned combat platform inertial stability control, which is based on open-loop fiber optic gyroscope.Scheme design, system modeling and theoretical analysis are finished based on the comprehensive analysis of foreign unmanned combat platform technology and the practical application of performance requirements. It provides a theoretical basis for the implementation. According to the comprehensive performance requirements of unmanned combat platform attitude control, open-loop fiber optic gyro is chose as a core inertial sensing component. A high-performance angular displacement feedback control sensor based on open-loop fiber optic gyroscope is designed. Temperature characteristics of the fiber gyroscope are improved by thermodynamic optimization. According to variable parameters and nonlinear characteristics of the system, stability control of the system is realized through the active disturbance rejection control technology. Considering the impact of platform anti-recoil ability, motor drive ability and the controllability, the design of the platform structure is optimized and the development of the system is completed. The test results show that the system performance achieves the goal of the design. These works have laid the foundation for further development of unmanned combat system.The main results and innovation of this thesis are as follows:1. A novel angular displacement feedback control sensor based on open-loop fiber optic gyroscope is designed. Experiment shows that this new sensor can measure the angular displacement and achieve feedback control of the motor at the same time.2. Disturbance rejection control techniques have been successfully used for the stability control of the unmanned combat platform. The parameter tuning of disturbance rejection controller have been solved by simulation and experiment online debugging.3. The strength and stiffness of the unmanned combat platform mechanical structure is verified by finite element method. The structure of the platform is lightweight redesigned under the conditions of ensuring the structural strength and stiffness.4. Domestic first engineering prototype of automatic weapons station for unmanned combat system is successfully designed and developed. Experimental result shows that the stability accuracy of azimuth-axis is 22.86 arc-seconds and the pitch-axis stability accuracy is 28.98 arc-seconds, which satisfy the demand of similar foreign automatic weapons stations.