Multistage Feedback Control Method for Armature Velocity in Electromagnetic Rail Launch

The stability of armature velocity is one of the crucial indicators for evaluating the performance of electromagnetic launch systems. A multistage control method for armature muzzle velocity is proposed based on the discharge time and quantity of the power module. By analyzing the pulse power supply model, the relationship between the discharge time, quantity, and armature velocity of the pulse power supply module is established. A multistage feedback control algorithm based on pulse discharge is introduced, which includes steps such as stride selection, adjustment of pulse power supply discharge time, and velocity calculation. By adjusting the discharge time and quantity of the pulse power supply according to the difference between the measured velocity at a reference position and the expected velocity, precise control of the armature velocity is achieved. When the armature muzzle velocity reaches 595.85 m/s, the proposed multistage feedback control method can maintain the accuracy of the armature muzzle velocity within 0.83%. The effectiveness of the control method is verified, providing a theoretical foundation for the precise control of armature muzzle velocity in practical launch experiments.