基于模拟退火算法的无刷直线直流电机恒推力优化

Optimization of Constant Force of Brushless Linear DC Motor Based on Simulated Annealing algorithm

在电磁弹射中,速度的增大会引起推力下降,要进行补偿,以往关于推力补偿的方法因速度过大导致效果较差甚至无法使用。文中建立了数学模型,推导出电流、推力解析式,分析了速度、电压、占空比对推力的影响。提出了对速度划分区间,区间内电压不变,通过提高占空比,区间之间提高电压补偿因速度引起推力下降的方法。介绍了模拟退火算法(SA),并将模拟退火算法用于搜索最优占空比。最后通过仿真,验证了理论分析的正确性及算法的可行性。

The increment of velocity will bring about force decline during the electromagnetic launchers and wish to compensate force decline. The effect of traditional methods is worse when the velocity is too great. The mathematical model was established, the calculation formulae of current, force were deduced, and then the influence of velocity, voltage and duty cycle to force was analyzed in detailed. The method of Compensa tion force was given, that the velocity was graded, changing the duty cycle in the same interval and adjust the voltage in the different interval to compensate the decline of force caused by velocity. The simulated an nealing algorithm （SA） was introduced and was used to seek for the optimal duty cycle. At last, the simula tion results verified the analysis and feasibility of algorithm.