快速系统仿真方法有时域矩阵法、增广矩阵法、替换法、根匹配法等，但它们都有一定的局限性，并占用较多的数据段内存．在满足工程所要求的精度条件下，要做到程度简单、数据量少，就必须加大计算步距．根据二阶系统的包络线方程和参数及临界步长，仿真实时控制系统，并比较几种控制系统算法的速度和精度，得出一些有益的结论，在实际实时仿真系统中可借鉴 Fast system simulation methods are time-domain matrix method, augmented matrix method, replacement method, root matching method, but they have some limitations and occupy more data segment memory. To meet the engineering requirements of the accuracy conditions, to be simple, less data, we must increase the calculation step. According to the envelope equation and parameters of the second-order system and the critical steps, the real-time control system is simulated, and the speed and accuracy of several control system algorithms are compared to draw some useful conclusions, which can be drawn from the real-time simulation system