共振探索與駐留試驗是為了對試件的疲勞和耐久性進行測試，RSTD試驗能幫助用戶找到試件結構的共振頻率點并在共振點上進行駐留以檢測試件的抗疲勞性和耐久性。RSTD試驗中進行駐留試驗時，其駐留方法包括頻率鎖定駐留、振幅峰值跟蹤和相位跟蹤。對于后兩種留方法，在跟蹤與駐留的過程中頻率會有少少變化。我們大家理解，在駐留試驗中，因为試件的加速疲勞，試件的共振頻率點會不斷降低，但相位是不會變化的。因此，與頻率鎖定駐留相比，在進行駐留試驗時，振幅峰值跟蹤和相位跟蹤的駐留方法能灵验的真實的跟蹤到不斷變化的共振點，從而對試件進行最灵验的RSTD試驗，以充分走漏其結構瑕疵。 我們选取頻率鎖定駐留和相位跟蹤駐留兩種差别的駐留方法對試件進行試驗，在本文中我們對兩種試驗結果進行了詳細分析，同時也介紹了怎样利用TENZO公司的SCS－8系列控制儀進行相位跟蹤試驗。
In recent years there has been a rapidly developing interest in the field of mechanical dynamics for a variety of reasons. Firstly, the development of stronger materials and greater economy in design has led to increasingly lighter structures, more prone to vibration problems. At the same time, increasing rotational speeds also give increasing likelihood of having to deal with structural resonances.
為什么要选择多變量控制？ 大家理解，在振動臺上做試驗，編輯參考譜時，低頻一般选择恒位移譜，中頻选择恒速率譜，而高頻选择恒加速率譜，這跟對振動臺的控制办法有的關系。另一方面，我們可以通過考究加速率-速率-位移之間的幅值轉換關系了解个中的意思。
Vibration is a mechanical phenomenon whereby oscillations occur about an equilibrium point. The oscillations may be periodic such as the motion of a pendulum or random such as the movement of a tire on a gravel road.
In physics, resonance is the tendency of a system to oscillate with greater amplitude at some frequencies than at others. Frequencies at which the response amplitude is a relative maximum are known as the system's resonant frequencies, or resonance frequencies. At these frequencies, even small periodic driving forces can produce large amplitude oscillations, because the system stores vibrational energy.
