共振搜索与驻留实验通常是为了对试件的疲劳和耐久性进行试验，RSTD实验能补助用户找到试件布局的共振频率点并在共振点长进行驻留以检试验件的抗疲劳性和耐久性。RSTD实验中进行驻留实验时，其驻留主意包孕频率锁定驻留、振幅峰值跟踪和相位跟踪。对于后两种留主意，在跟踪与驻留的过程中频率会有少少变化。我们大家理解，在驻留实验中，由于试件的加速疲劳，试件的共振频率点会不竭降低，但相位是不会变化的。因而，与频率锁定驻留比拟，在进行驻留实验时，振幅峰值跟踪和相位跟踪的驻留主意更能灵验的的跟踪到不竭变化的共振点，从而对试件进行灵验的RSTD实验，以充分显露其布局缺欠。 我们采取频率锁定驻留和相位跟踪驻留两种分别的驻留主意对试件进行实验，在本文中我们对两种实验结果进行了详细分析，同时介绍了若何运用TENZO公司的SCS－8系列控制仪进行相位跟踪实验。
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.
为什么要采用多变量控制？ 大家明白，在动摇台上做尝试，编辑参考谱时，低频一般采用恒位移谱，中频采用恒速度谱，而高频采用恒加速度谱，这跟对动摇台的控制主意有的相干。另一方面，我们可能通过研究加速度-速度-位移之间的幅值改动相干了解其中的真理。
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.
