论文部分内容阅读
为了优化课题组采用的比例减压阀的高端驱动电路,利用MATLAB/SIMULINK分别分析了PWM频率、占空比及采样电阻对驱动电路性能的影响,仿真结果显示,电流波纹受PWM频率影响较大,稳态电流大小受PWM占空比影响较大。在此基础上,通过合理的假设建立了高端驱动电路的多目标优化数学模型,利用MATLAB优化工具箱中的fmincon函数求出了满足约束条件的最佳组合参数:采样电阻为0.3001Ω,PWM频率为5KHz,不仅保证了占空比与流过线圈的电流近似成线性关系,而且实现了稳态电流波纹和电流上升时间最小的目标。
In order to optimize the high-end driving circuit of the proportional pressure reducing valve adopted by the research group, the influence of the PWM frequency, duty cycle and sampling resistance on the performance of the driving circuit is analyzed respectively by using MATLAB / SIMULINK. The simulation results show that the current ripple is greatly influenced by the PWM frequency , The steady-state current is greatly affected by the PWM duty cycle. Based on this, the multi-objective optimization mathematical model of high-end driving circuit is established through reasonable assumption. The optimal combination of parameters is obtained by using the fmincon function in MATLAB optimization toolbox. The sampling resistance is 0.3001Ω and the PWM frequency 5KHz, not only ensures that the duty cycle is approximately linear with the current flowing through the coil, but also achieves the goal of minimizing steady-state current ripple and current rise time.