Abstract：Trigger control strategy is critical for the multi-stage synchronous induction coil launcher (SICL). However, with the increase of the number of stages and armature speed, the trigger timing control and power regulation becomes more complicated, while the control effect of the traditional position trigger strategy or the time trigger strategy is unsatisfactory. Therefore, a kind of adaptive design strategy is proposed in this paper, which combines the systematic differential equations and governing equations of SICL. The main idea is to approximate that the equivalent single-turn inductance of two adjacent coils is equal, furthermore, the turn number of next stage driving coil is calculated according to the size of the upper-stage coil, and then modify the size of the coil. The triggering sequence is determined by the relative position of the coil center and the armature tail. Taking a 25 stages SICL as an example, the structural parameters and triggering timing are designed adaptively, and the validity and accuracy of the adaptive design strategy are proved by comparing with the simulation results of the finite element method (FEM). In addition, the influence of the rise length and slip speed on the launch performance is quantitatively analyzed, which provides a reference for their selection and optimization.
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2018, Vol. 33 
