Research On Two-dimensional Guidance Actuator Of Rocket

Two-dimensional guided rocket is a kind of simple guided rocket.Its core actuator is steering gear control system.This paper conducts in-depth research on the counter-spinning steering gear actuator,designs a control system using an improved integral variable structure for the speed loop,researches the attitude solution algorithm,and designs a set of attitude solution algorithm.Experimental research,the main research results are as follows:(1)Based on the analysis of the structure and working principle of the brushless DC motor,a mathematical model of each part of the motor control system is established.The mathematical model of the motor control system is derived,and the control model of the motor control system is established.Finally,the simulation model of the motor control system is established in Matlab/ Simulink.Secondly,this paper studies the starting characteristics of the variable geometry inlet of the rotating cowl.The rotating cowl can adjust the entry area of the inlet,increase the overflow,and reduce the lower starting Mach number of the inlet.Two kinds of adjustment methods were adopted to simulate and analyze the rotation of different amplitude at low Mach numbers.Finally,the model was optimized to improve the parameter performance of the inlet.(2)Adopt three closed-loop control systems to design the controller of the motor,and focus on the control system of the speed loop.An improved integral sliding mode variable structure speed controller is designed,and the controller simulation model is constructed using PID,integral sliding mode and improved integral sliding mode,respectively,and the speed loop control simulation is performed.The above three controllers are embedded in the position loop control to perform position loop simulation and analyze the system performance.(3)Research on the attitude solution algorithm.First,the simple calibration of the accelerometer and gyroscope is studied,and then the principle of complementary filtering algorithm and extended Kalman filtering algorithm is analyzed.The two algorithms are used to design the solving algorithm,and the performance analysis of the two algorithms is performed.(4)Developed a control board with Spartan6 and STM32F405 as the core and a motor drive board with IR2110 s as the core,and completed the hardware design of the system.The software of the host computer and the software of the host computer are designed,and the realization of the control system software is completed.(5)Design the system test platform,complete the prototyping of the simulated projectile,and assemble the test system platform.The designed control system is tested,and the comprehensive test and simulation results show that the function of the system that has been preliminarily completed is lacking in accuracy,laying a good foundation for subsequent research.