Optimization of Trigger Strategy for Multistage Coil Launcher

The calculation of the trigger timing sequence for multistage coil launcher presents significant challenges due to the intricate model structure and high degree of coupling, which complicates numerical analysis. Typically, the optimal trigger timing sequence for multistage coil launcher is derived through iterative field-circuit coupling simulations utilizing a finite element model (FEM). However, this approach often demands considerable time investment and is not conducive to real-time control of coil launch devices. To facilitate real-time control of coil launch devices using velocity and position parameters, this article conducts an analysis of the circuit and force models associated with multistage coil launcher based on the current filament method (CFM). Building upon the critical trigger formula derived from velocity and position parameters, we optimize the triggering strategy for multistage coil launcher and propose a new trigger formula. The effectiveness of this optimized triggering strategy is validated through a field-circuit coupling simulation model. This method demonstrates an approximate 3% improvement in efficiency compared to traditional critical trigger methods. Ultimately, this strategy provides a theoretical foundation for achieving real-time control over multistage coil launcher triggering systems.