If the length of time allowed before taking the reading is equal to the rise time, an error of approximately 10% will result, since the signal will have reached only 90% of its final value.

如果获取读数前允许的时间等于上升时间，将会产生大约10%的误差，因为信号只能上升到其最终值的90%。

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There out, the static index (steady- state error) and the dynamic index (overshoot and rise time) of auto kinetic control system can be fix on.

由此，确定汽车运动控制系统的期望静态指标（稳态误差）和动态指标（超调量和上升时间）。

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To reduce the error to 1%, about two rise times must be allowed, while reducing the error to 0.1% would require roughly three rise times (or nearly seven time constants).

为使误差降低到1%，必须等待大约两倍的上升时间。而为了使误差降低到0.1%，则必须等待大约三倍的上升时间(或者接近7倍时间常数的时间)。

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