| Since twentieth Century,with the rapid development of science and technology,the consequent war situation has undergone a fundamental change,the war process is greatly shortened,which requires that the precision of weapon equipment is greatly improved.Therefore,in the study of new armored vehicles,in addition to continuing to maintain large caliber artillery,increase the initial speed and develop new types of missiles,the development of the fire control system is put in the first place.Aiming line stabilization technology as the key technology of armored vehicle fire control system has always been the focus of research in various countries.The western developed countries have successfully applied steady aim technology to armored vehicle fire control system from 1890s,and the research on the upper anti stabilization technology in China started relatively late,and the early technology was not mature enough.A large number of armored equipment in active service is still simple fire control.The 99 main battle tank fire control system adopts the advanced upper reflector aim-stabilization technology.With the development and maturity of the upper reflector stabilization technology in recent years,the 96A tank fire control system,the 99A tank fire control system,the 04 infantry fighting vehicle fire control system,the 05 amphibious armored assault vehicle fire control system,the 8×8 wheeled armored assault vehicle fire control system are successively issued to army.Although the technology gap has been filled,there is still a big gap between the stability accuracy,the mobility of the chariot and reliability.Therefore,the research on the key technologies of the upper reflector aim-stabilization system is of great guiding significance to the improvement of the performance of armored equipment fire control system.The "×× type of armored vehicle fire control system" development project as background,the gyro theory,the reliability design theory,the control theory,the theory of error analysis,reliability design theory and field tests combined with demand,the stability mechanism of typical two axis gyro platform is studied.Combined with the development of the product prototype,some key technical problems of the upper reflector aim-stabilization system are further studied.The principle prototype of the upper reflector aim-stabilization system is developed,which is successfully applied to a certain type of infantry chariot fire control system.The main contents of this paper as follows:The upper reflector aim-stabilization system on armored vehicle is developed.The system is composed of two axis gyro stabilized platform(upper reflector component)and steady sight control combination.Based on the theory of two degree of freedom gyro precession,analyzes the motion characteristics of gyro stabilized platform,composed of two degree of freedom gyro is analyzed in detail,the type of gyro stabilized platform consisting of two degrees of freedom gyroscope and its typical applications are studied.A semi-liquid integrating gyro is used by gyro stabilized platform as an inertial sensing element for disturbance angle rate of the sensitive carrier testing;working with stable servo correction circuit,power amplifier circuit and torque motor,servo control system to realize stable mirror on the earth space and synchronous tracking and artillery line control.The gyro stabilized platform is used as the control object,and the gyroscope sensing element and the motor actuating element are mainly arranged.The sensitive carrier disturbance is sent to the stabilization control combination,and the corrected drive signal is received and the sight line is stabilized by the torque motor dragging mirror.The stabilization control combination receives the control logic and control signal of the fire control computer,and completes the system's power supply timing control,working condition conversion,sensor data processing,gyroscope power supply,stable error signal correction,power amplification,sight tracking control and servo signal correction and amplification.Thus,the functions of bidirectional stability control,tracking control,target angle speed output,manual drift of sight line and servo control of sight line servo to gun line are realized,and the state signals and sensor signals needed by the fire control computer are sent to the fire control computer.According to the classic PID control poor anti-interference ability,control precision is low,the combination of classical control theory and modern control is adopted,and a variety of control strategies are compared.Based on the theory of synovial variable structure control and the theory of auto disturbance rejection control,the corresponding controller is designed for the system.The effectiveness of the controller is verified by the simulation experiment and the physical test.Considering the special weapons work,according to the present domestic equipment reliability and low status,application of FMECA method to the upper reflector aim-stabilization system reliability design,the reliability of the model assumptions and conditions and established the mathematical model of reliability,stabilization control combination and mirror assembly and stabilized sighting system the reliability prediction,and puts forward the design concept of reliability technology.According to the different operational terrain conditions are analyzed and the motion characteristics of the target line,analyzed and verified experiment and on the various functions of the foundation on the upper reflector aim-stabilization system. |
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