中文说明：求系统的时域性能指标的函数，给定系统的数学模型，即可通过该函数计算系统的超调量、峰值时间、调整时间和上升时间，经测试非常好用。
English Description：
Given the mathematical model of the system, the overshoot, peak time, adjustment time and rise time of the system can be calculated by this function. It is very useful after testing.