Design And Control Strategy Of External Energy Small-caliber Artillery Drive System

External energy small-caliber artillery is a weapon that relies on motor-driven automata to achieve cyclic actions such as feeding,locking,firing,and shell extraction.It has a simple structure,reliable performance and easy maintenance.It has a wide range of application scenarios in unmanned weapon systems.At present,most of the external energy weapon systems have the problems of large and complex system and high quality,which restricts the reliability and miniaturization of weapons.In this thesis,the motor drive technology of small-caliber artillery with external energy sources is studied,mainly to analyze the drive control system that meets the short-term high-overload characteristics during the launch process,and the integrated design of the external energy drive control system is completed.The simulation model of the drive control system is used to verify the design scheme through experiments.First,foreign energy small-bore artillery drive the overall scheme of the control system is analyzed,according to a certain kind of automata tests under different rf output motor load torque and power consumption,determine the basic parameters of drive motor,and the driving control system requirements,design index and key technology are studied.According to the structure and function of the drive controller elaboration to carry out the integration design,completed the drive control system hardware circuit of the driver board and control panel design,driver board including the inverter circuit,optical coupling isolation,voltage and current detection and protection circuit,rf control panel including main control unit circuit,rotary encoder demodulation circuit and power supply circuit,The 3D model of PCB layout is derived.Secondly,external energy weapon speed control precision of fire spreading is larger,the influence of the revolving barrel gun torque mainly include automata for lose resistance moment,resistance moment and in high frequency emission load torque fluctuation is bigger,in order to reduce the high frequency of rotation speed fluctuation,improve the speed control precision,conducted outside the small-bore artillery drive system weak magnetic energy control strategy research.When the motor speed is above 5000r/min,the motor enters the weak magnetic constant power region,and the principle block diagram of weak magnetic control speed regulation system based on large torque voltage ratio(MTPV)is established.The motor speed reaches the maximum speed value in the constant power area,realizing the magnetic weakening control of the maximum output efficiency,and improving the motor speed efficiency and response ability.Finally,simulation analysis model of the drive control system is established in Simulink,and the dynamic performance of the maximum torque voltage ratio(MTPV)magnetic weakening control strategy is simulated and analyzed.The results show that: When the motor is running from no-load,it only takes 100 ms to reach the speed of 5000r/min,and the motor speed expands from 5000r/min to 6500r/min.The response time at this stage is only 50 ms.After the speed reaches the stable value,the motor has shorter response time and faster speed,and has the ability of quick start and quick response.The response speed of foreign energy small-caliber gun under high radio frequency is improved,and the rationality of the magnetic weakening control is verified.Finally,the feasibility of the design scheme is verified by experimental platform testing.