Optimization analysis of multi-stage synchronous induction coil launcher based on overload control

In order to provide guidance for the research of multi-stage synchronous induction coil launcher (MSICL) system smooth acceleration application and launching overload precise control, we studied the optimization design of the MSICL system in given overload constraint conditions, and proposed a launcher optimized design method based on combination objective function of launch velocity, efficiency, and overload acceleration. Moreover, we established an MSICL simulation model with the software MATLAB to optimize and analyze the 5-stage launcher by using the genetic algorithm. The optimal design scheme for 5-stage launcher, 0.5 m caliber, 1m length, 625 kg payload, 20 m/s velocity, and 33g (g=9.8 m/s2) maximum overload is gained by simulation, and all 5-stage drive circuit parameters are the same: the charging voltage is 7 kV, the capacitance is 7.4 mF, the drive coil axial length is 185 mm, the radial thickness is 119 mm, the number of turns is 308, the armature axial length is 193 mm, and the radial thickness is 131 mm. Trigger position between bottoms of the drive coil and the armature are 122 mm, 1 mm, -73 mm, -158 mm, -218 mm. Launching velocity is 20.1 m/s. Efficiency is 15.7 %. The design method satisfies the requirements of design and the smooth acceleration in a given overload limit condition, and achieves optimal launch velocity and efficiency.