Modern control theory has arisen with the advent of high - speed digital computers and characterized by the state variable concept with emphasis on matrix algebra and with analysis and design principally in the time domain 现代控制理论是随着高速数字计算机的出现而产生的,主要特点是使用状态变量的概念并强调矩阵代数和主要在时间域进行分析和设计。