Is there any difference between vibration displacement, vibration velocity, and vibration acceleration?

There are certainly differences; otherwise, just use one, haha. The specific differences are quite complex; you might want to look for them on forums, or attend a training course. It’s too much of a hassle to explain in detail. You just need to know that there are different standards for various things; generally, there’s no standard for acceleration.

It seems to be something from high school; just look it up in the books – it’s not that difficult actually

There is a difference! Firstly, there is a qualitative difference in terms of their nature, as they focus on different things, yet there is a connection among the three of them!

It was discussed in the forum; you might as well look for it yourself. Below, I’ve found some things for you to take a look at. Vibrations can be classified by frequency range into low-frequency vibrations: vibrations at f1000Hz. The vibration displacement specifically reflects the magnitude of the shaking, the vibration velocity reflects the amount of energy, and the vibration acceleration reflects the intensity of the impact force. It can also be considered that, in the low-frequency range, the vibration intensity is proportional to the displacement ； In the medium-frequency range, the vibration intensity is proportional to the velocity ； In the high-frequency range, the vibration intensity is proportional to the acceleration. For the reasons mentioned above, in practical applications in factories, the vibration of large-scale machine rotors is generally represented by the peak value of the vibration displacement, which is measured using non-contact eddy current displacement sensors installed on the bearings to detect the vibration of the rotor journals ； The vibration of large-scale machine bearing housings and cylinders, as well as medium and small-sized pumps, is expressed in terms of the effective value of vibration velocity, which is measured using magnetoelectric velocity sensors or piezoelectric acceleration sensors mounted on the machine housing ； The vibration of gears is expressed as the single-peak value of vibration acceleration, which is measured using an acceleration sensor. This post was last edited by Longsky Eagle on 2009-4-2 09:25.]

The three are connected through the Fourier transform; you can understand this by looking at the Fourier transform.

I already knew a little, but I learned a lot here. Thank you to the fellow travelers on (especially floor 5)!

Acceleration integrated gives velocity, and velocity integrated gives displacement. As was mentioned by someone above, this difference is relevant in practical applications, so it will not be repeated here. International vibration standards generally use velocity as the unit, while in industries such as petrochemicals, displacement is more often used as the unit for bearing equipment. In general industries, acceleration sensors are typically used to capture acceleration signals, which are then integrated to obtain velocity signals for analysis

Depending on the excitation frequency of the device, the selected vibration displacement, velocity, or acceleration is used as a reference