有些工作还要求系统给出触发信号，或能自动响应生物的行为反应。

Others have to give a trigger signal or respond automatically to the behavior results.

youdao

本文讨论利用振动系统的随机响应和自由响应信号识别系统模态参数问题。

The identification of modal parameters of a vibration system by means of random response and free response signal is discussed.

youdao

通过分析声表面波谐振器对不同激励信号的响应，本文选用正弦脉冲串作为激励信号，来提高系统工作效率和传感距离。

Through the analysis of the response of resonator base on different pumping signals, sine burst is used for pumping signal of the system to improve the efficiency and detecting-distance.

youdao