Manufacturers Of Vibratory Finishing Machine Share What Random Vibrations Are (Automobiles & Vehicles - Auto Parts & Services)

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Item ID 1303220 in Category: Automobiles & Vehicles - Auto Parts & Services

Manufacturers Of Vibratory Finishing Machine Share What Random Vibrations Are

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Random vibration is a kind of non-deterministic vibration, which cannot be described by precise mathematical relation. It can only be treated by the theory of random process and mathematical statistics, and its time history curve. Let's follow the manufacturer of Vibratory Finishing Machine to see the specific calculation process.

The vibration signal of a machine usually takes the set of all possible signals Xk(t) as a process {x(t)}, and each Fermentation starter line Xk(t) becomes a sample of the random process {x(t)}. The statistical characteristics of random process {x(t)} can be evaluated by its population mean μx(t1) and autocorrelation function Rx(t1, t1 Tau). Where if μx(t1) and Rx(t1, t1 Tau) do not change with t1, then the random process {x(t)} is stationary, otherwise the random process {x(t)} is non-stationary. The above-mentioned statistical parameters of a sample Xk(t) curve in the random process {x(t)} can also be calculated. If the following formula exists, the stationary random process is an ergodic stationary random process. For ergodic stationary random signals, the statistical characteristics of a single sample are the same as the population, so we can replace the population with a single sample. That is to say, if we can prove that a random process is stable and the states have passed through, we only need to collect a sample for analysis, which is one of the basic principles of modern random signal processing.

The above calculation requires a large number of data statistics, which is obviously impossible to realize and can only be evaluated according to experience. Generally speaking, the vibration signals seen in the project are mostly stable and ergodic, such as the vibration signals of the motor under stable load and stable rotation speed, the cutting force signals of props under certain penetration of cutting too quantity and stable feed speed, etc. However, the vibration signal of the motor during the start-stop process and the cutting force signal of the cutter during the feed and withdrawal processes are non-stationary signals. In actual operation of equipment, the vibration caused by faults usually has a certain Period component and is often submerged in random vibration signals. When the degree of equipment failure intensifies, the Period component in random vibration will intensify, thus increasing the vibration of the whole machine. Therefore, in a sense, the process of equipment vibration diagnosis is the process of extracting and identifying Period signal components from random signals.

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Target State: Northern Territory
Target City : Huzhou
Last Update : 28 April 2019
Number of Views: 22
Item  Owner  : machineunique
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2019-11-15 (0.072 sec)