Design Of Missile-Borne Imaging Control System Under Flight Conditions

Target image detection will be an important research field for ammunition detection and precision guided weapons using image guidance.Under the conditions of modern war,such weapons have the trend of high-speed,but also take into account the special requirements of miniaturization and lightweight,so the imaging quality faces great challenges,and the rapid response stability of the missile-borne imaging platform in the high dynamic environment is a key factor affecting the imaging quality.Aiming at the problem of fuzzy imaging of the weapon system when flying at low altitude and high speed,the main function of the missile-borne imaging control system is to isolate the camera attitude changes caused by environmental factors such as the projectile body pitch and moment disturbance,so as to ensure that the camera can maintain the desired visual axis stability within a specified period of time,so as to take high-quality target images under flight conditions.Aiming at the operational requirements and application characteristics of the low altitude and high speed weapon system,the working principle and technical scheme of the missile-borne imaging control system are put forward,that is,the attitude sensor is installed on the camera platform,and the target point is aimed within the shutter time by using the single axis stabilization.With STM32F407 as the control chip of the imaging system,brushless DC motor as the driving component and IMU901 as the attitude sensor,the imaging control system was established.In the aspect of reducing sensor noise,Kalman filter method is applied and verified by MATLAB simulation.Based on the mathematical model of brushless DC motor,the model of pitch shaft control system is established.Through the analysis,the fuzzy PID control method is selected to control the system,and the simulation results verify that the fuzzy PID control method has excellent rapidity and stability.Finally,the imaging control system is tested experimentally.The three-axis turntable is used to test the control system under the simulated projectile body pitching state.The results show that the system can be stabilized within 0.5s,and the results meet the design requirements.