| The attitude and orbit control power system is widely used in launch vehicles,satellites,airships,missiles,etc,to achieve attitude and orbit control of spacecraft.The attitude and orbit control power system of spacecraft is mainly controlled by the solenoid valve to control the engine switch and the steering gear to control the thrust direction of the engine.Therefore,the response time of the solenoid valve and the accuracy of the steering gear directly affect the performance of the spacecraft.How to improve the dynamic response performance of the solenoid valve and the swing angle accuracy of the actuator has become one of the important research directions in the field of aerospace power.Based on the research background of a certain type of attitude and orbit control engine,the following researches are carried out:Firstly,according to the design index of solenoid valve,a two-dimensional simulation model of solenoid valve is established through Maxwell to study the influence of the structural parameters of solenoid valve and driving circuit parameters on the dynamic performance of solenoid valve.The simulation principle of "high startup,low maintenance" is verified and the hardware integration of the drive circuit is designed.Secondly,according to the performance index of the proposed steering gear,the mathematical model of the permanent magnet synchronous motor is built through Simulink,and the MFO algorithm and RBF neural network are combined to optimize the speed loop of the motor,and compared with the traditional PID algorithm and RBFPID controller,meeting the high-performance requirements of the steering gear.Finally,the engine measurement and control system is studied in detail,and according to its characteristics,a specific design scheme is proposed,and the system circuit design,software structure design and control system scheme design are completed.The hardware part of the system mainly includes: sensors,acquisition boards,etc;The system software design uses Labview language,develops a set of general measurement and control software and completes the joint debugging and testing of the entire measurement and control system,which verifies the rationality of the simulation data.The experimental results show that: the measurement and control system based on Labview developed in this paper meets the design indicators. |
