本文针对工业过程控制中普遍存在的大纯滞后对象，从最优控制的角度，研究了大纯滞后对象的LQ逆问题，给出了一般的设计过程。仿真研究表明，运用最优控制的方法，能够使大纯滞后对象获得良好的动静态性能和较强的鲁棒性及抗扰性。关键词：大纯滞后，LQ 问题，LQ 逆问题，加权矩阵，特征多项式，极点配置Abstract:In this paper,the optimal control is proposed for the long time-delay system which is very popular in the domain of the industrial process. The LQ inverse problem is studied for the long time-delay system.The common designing procedure is given.Simulations show that the optimal control has good effect on the long time-delay system.It has good robustness and ability of anti-disturbance.Key words:time-delay，LQ problem，LQ inverse problem，weighting matrix，characteristic polynomial， pole assignment
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