A Method of Generating Timing for a Given Target Current Waveform in Electromagnetic Launch Technology

Abstract

Under the condition of given charging voltage, by adjusting the timing of the power supply trigger, the electromagnetic emission can produce different discharge current waveforms, and then produce different initial velocity. This paper mainly uses the characteristics of the discharge current in a single power module in electromagnetic launch, by specifying the rising time and the maximum value of the total discharge current; a multipopulation genetic algorithm is used to obtain the optimal trigger timing, and the speed control of electromagnetic launch can be achieved. The specific implementation process of algorithm are as follows: the rising time and the peak value of the expected current are set as the objective function, the timing is set as a variable, and the multiple time series are binary coded to get multiple individuals, and then calculate the degree of survival by crossover, mutation, and heredity among individuals, that is, to judge whether the rising time and the maximum value of the discharge current can reach the expected goal, and to keep the survival of the genes to the next generation and screen repeatedly, and then to select the optimal control timing. The optimal control strategy can be obtained by adjusting the parameters such as genetic algebra and mutation rate. The experimental results show that this method produces the optimal power supply timing, and through the application of digital signal processing control system, the expected discharge current waveform can be obtained in the experiment of electromagnetic launch, which also lay a good foundation for the rate control of electromagnetic launch.