Analysis package "Vibration Characteristic Values"

With the analysis package "Vibration Characteristic Values" you can create or edit your individual analysis configuration. The following graphic shows the different areas of the "Vibration Characteristic Values" window:

NOTE

In the "Calculation" drop-down of "Settings" section by default "Instant" field is selected. If the "Instant" field is selected, then "Calculation Interval [s]" input field and "Upload Interval [min]" input field is displayed on the screen. If the "Optimized" field is selected, then "Calculation Trigger (repeated)[min]" input field and "Calculation Duration" input field is displayed.

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Parameter of "Vibration Characteristic Values"

The following table shows the parameters of the "Vibration Characteristic Values" window:

Area

Parameter

Description

General

Analysis Package Name

Add an individual name for your analysis package.

Description

Add an individual description (optional).

Settings

Input Data Name

Add the name of an available input data.

Speed Value [rpm]

Add the speed of the asset.

Calculation

Select the calculation mode for analysis.

A calculation of type "Instant" is continuously performed with the defined Calculation Interval. It will upload immediately after the defined Uploaded Interval. This calculation type requires large CPU space and memory configuration as it is a constant stream processing.

A calculation of type "Optimized" is executed after defining a dedicated Calculation Trigger Time for a defined Calculation Duration. This calculation type requires less CPU space and memory configuration as it is a schedule block processing of data.

Calculation Interval [s]

Add the time interval for the calculation of new values.

Upload Interval [min]

Add the time interval for the upload of the calculated values to MindSphere.

Calculation Trigger (repeated)[min]

Define the time after that a new calculation is executed with a Calculation Type "Optimized".

Calculations

Data Storage Asset

  • Select the asset your configuration is related to.

  • Change to Fleet Manager to see the respective data.

RMS Velocity

The RMS (Root Means Square) of a velocity signal provides information about the energy content of a vibration. The RMS is calculated from the dominant frequency component. Due to this fact, this quantity provides only information about the general condition of a machine or component. Therefore, it is impossible to detect changing vibration frequencies or new developing frequency components caused by a beginning damage. The velocity RMS value is a crucial quantity in order to detect inappropriate behavior of stationary machine components. In order to receive the velocity signal, the input acceleration signal is converted into a velocity signal automatically. It has to be considered that the amplitudes above 1500 Hz are attenuated because of the integration.

Peak-Peak Velocity

The peak-peak value of a velocity signal can be calculated as auxiliary quantity to the velocity RMS in order to detect inappropriate behavior of stationary machine components. In order to receive the velocity signal, the input acceleration signal is converted automatically into a velocity signal. It has to be considered that the amplitudes above 1500 Hz are attenuated because of the integration.

Zero-Peak Velocity

The zero-peak value of a velocity signal can be calculated as auxiliary quantity to the velocity RMS in order to detect inappropriate behavior of stationary machine components. In order to receive the velocity signal, the input acceleration signal is converted automatically into a velocity signal. It has to be considered that the amplitudes above 1500 Hz are attenuated because of the integration.

RMS Acceleration

The RMS (Root Means Square) of an acceleration signal provides information about the energy content of a vibration. The RMS is calculated from the dominant frequency component. Due to this fact this quantity provides only information about the general condition of a machine or component. Therefore, it is impossible to detect changing vibration frequencies or new developing frequency components caused by beginning damage. The acceleration RMS value is a crucial quantity in order to detect inappropriate behavior of stationary machine components.

Peak-Peak Acceleration

The peak-peak value of an acceleration signal can be calculated as auxiliary quantity to the acceleration RMS in order to detect inappropriate behavior of stationary machine components.

Zero-Peak Acceleration

The zero-peak value of an acceleration signal can be calculated as auxiliary quantity to the acceleration RMS in order to detect inappropriate behavior of stationary machine components.

Crest Factor

The crest factor of a signal is the ratio of the zero-peak value to the RMS. A typical acceleration signal from a machine with a large imbalance possesses a crest factor similar to √2. But as the bearings begin to wear and impact begins to occur, the crest factor has a higher value than this. Therefore, this quantity is very important for evaluating rolling bearing.