step response的用法和樣例：
例句
- When carrying on the modal analysis, studies that the low step vibration gets up the leading role, prepares for the further dynamic analysis.
對齒輪進行模態特性分析時，研究了齒輪的振動是低階模態起主導作用，為齒輪進一步的動態分析做好準備。 - The response velocity of transducer was measured by the laser Doppler vibrometer.The loading and unloading process were analyzed and modeled in three segments.
據此對超聲加卸載過程分段，進行頻譜分析和非穩態特性建模，並研究了相關的試驗方法。
