一种采用随机数直接搜索方法的应用及其改进

应用随机数直接搜索的单纯形最优化方法，将系统高阶模型简化为低阶效模型，并对控制系统调节器参数进行在线寻优，在保留方法原有优点的基础上对搜索范围的变化规定了改进，即依据目标函数值的大小来改变收缩系数，以达到搜索参数快速收敛于最优点的目的。

Application and Improvement of the Direct Search Procedure Using Pseudo Random Numbers

Model reduction for the conversion of a higher order transfer function to one of lower order and for the online search of optimal controller parameters in a control system are band on a direct search procdure using pseudo random numbers. The paper abc at retaiining all the advachges of the optimization procedure and presents an improved method on the changeable range of the region of search i.e. in order to reach rapidly the optimum the change of reduction factor h is bed on the she of the objective function. Simulation results show that the optimum can be reached when using the improved method in only 10- 15 iterations when compared with the LJ method,and computer (CPU) the can be reduced by 20%-50%.