一种基于矛盾思想方法的性能指标函数

A New Performance Function Based on Contradictions

抓住给定值阶跃响应过渡过程性能指标中存在的主要矛盾培训,构造了一种以三个分立的过渡过程曲线特征参数为组成部分的性能指标函数。该性能指标函数在保持主要性能指标平衡性的基础上,加入了最大动态偏差限制、负向波动参数和过渡过程时间参考值,从而在保证稳定性的同时体现了控制要求和实际对象的动态特性,因而具有良好的适应性和针对性。仿真试验结果表明,使用该性能指标函数优化得到的系统,具有给定动态偏差范围内快速的阶跃给定值跟随性能,具有良好的抗扰动性能和鲁棒性。

Started with the contradictions among the performance specifications of set-value step-response transitional process,the essence of set-value follow control system optimization is analyzed,and it is considered the product of unity of opposites of contradictions.A new performance function applied to simulative optimization of set-value follow control system is constructed from the point view of grasping the principal contradictions,which is made up of three characteristic parameters of step-response transitional process.On the basis of balance of major performance,the max dynamic error allowance of transitional process,negative fluctuation value,and the reference value of settling time are adopted in the performance function by means of appropriate equalization and normalization to guarantees the stability of the system and embody the practical need and the characteristic of controlled plant.Simulation results show the optimized system using the method can obtain swift step-response with its dynamic error well restricted within the assigned bondage.Its anti-disturb performance and robustness are also proved to be good.