Associated dynamic performance of the clamping force control valve used in continuously variable transmission （CVT） is optimized. Firstly, the structure and working principle of the valve are analyzed, and then a dy...Associated dynamic performance of the clamping force control valve used in continuously variable transmission （CVT） is optimized. Firstly, the structure and working principle of the valve are analyzed, and then a dynamic model is set up by means of mechanism analysis. For the purpose of checking the validity of the modeling method, a prototype workpiece of the valve is manufactured for comparison test, and its simulation result follows the experimental result quite well. An associated performance index is founded considering the response time, overshoot and saving energy, and five structural parameters are selected to adjust for deriving the optimal associated performance index. The optimization problem is solved by the genetic algorithm （GA） with necessary constraints. Finally, the properties of the optimized valve are compared with those of the prototype workpiece, and the results prove that the dynamic performance indexes of the optimized valve are much better than those of the prototype workpiece.展开更多
通过理论和仿真研究分析了LC型输出滤波器滤除高次谐波存在的不足,提出在LC型输出滤波器中串联一个小电阻的改进方法,改进后的输出滤波器能使混合型有源电力滤波器(Hybrid Active Power Filter,简称HAPF)具有更好的性能。在此基础上,综...通过理论和仿真研究分析了LC型输出滤波器滤除高次谐波存在的不足,提出在LC型输出滤波器中串联一个小电阻的改进方法,改进后的输出滤波器能使混合型有源电力滤波器(Hybrid Active Power Filter,简称HAPF)具有更好的性能。在此基础上,综合考虑滤波器的输出能力、滤波效果和动态性能,提出运用改进遗传算法设计输出滤波器,并对设计的实例进行实验。实验结果表明,采用改进遗传算法设计的输出滤波器使HAPF具有更好的整体性能。展开更多
基金Key Science-Technology Foundation of Hunan Province, China (No. 05GK2007).
文摘Associated dynamic performance of the clamping force control valve used in continuously variable transmission （CVT） is optimized. Firstly, the structure and working principle of the valve are analyzed, and then a dynamic model is set up by means of mechanism analysis. For the purpose of checking the validity of the modeling method, a prototype workpiece of the valve is manufactured for comparison test, and its simulation result follows the experimental result quite well. An associated performance index is founded considering the response time, overshoot and saving energy, and five structural parameters are selected to adjust for deriving the optimal associated performance index. The optimization problem is solved by the genetic algorithm （GA） with necessary constraints. Finally, the properties of the optimized valve are compared with those of the prototype workpiece, and the results prove that the dynamic performance indexes of the optimized valve are much better than those of the prototype workpiece.
文摘通过理论和仿真研究分析了LC型输出滤波器滤除高次谐波存在的不足,提出在LC型输出滤波器中串联一个小电阻的改进方法,改进后的输出滤波器能使混合型有源电力滤波器(Hybrid Active Power Filter,简称HAPF)具有更好的性能。在此基础上,综合考虑滤波器的输出能力、滤波效果和动态性能,提出运用改进遗传算法设计输出滤波器,并对设计的实例进行实验。实验结果表明,采用改进遗传算法设计的输出滤波器使HAPF具有更好的整体性能。
