VibrationFrequencyWeighting (FPScript)

21.09.2021

Filters an acceleration signal with a band-limited weighting filter for analyzing whole-body and hand-transmitted vibrations.

Syntax

VibrationFrequencyWeighting(Signal, FrequencyWeighting)

 

The syntax of the VibrationFrequencyWeighting function consists of the following parts:

Part

Description

Signal

The acceleration signal to be evaluated.

Permitted data structures are signal. All numeric data types are permitted.

For the X component additional restrictions do apply.The values must have a constant positive spacing. Void values are not permitted in this argument.

For complex data types the absolute value is formed.

If the argument is a list, then the function is executed for each element of the list and the result is also a list.

FrequencyWeighting

Chooses the frequency weighting.

The argument FrequencyWeighting can have the following values:

Constant

Meaning

FREQUENCYWEIGHTING_WB

Vibration in railway vehicles (ISO 2631-4)

FREQUENCYWEIGHTING_WC

Vibration when sitting with a backrest; direction of vibration X (ISO 2631-1)

FREQUENCYWEIGHTING_WD

Horizontal vibration when standing, seated and recumbent (ISO 2631-1)

FREQUENCYWEIGHTING_WE

Rotational vibration (ISO 2631-1)

FREQUENCYWEIGHTING_WF

Evaluation of kinetosis (motion sickness) at frequencies below 0.5 Hz when seated and recumbent; direction of vibration Z (ISO 2631-1)

FREQUENCYWEIGHTING_WH

Hand-transmitted vibration (ISO 5349-1)

FREQUENCYWEIGHTING_WJ

Vibration when recumbent (head); direction of vibration X (ISO 2631-1)

FREQUENCYWEIGHTING_WK

Vertical vibration when standing, seated and recumbent (ISO 2631-1)

FREQUENCYWEIGHTING_WM

Vibration in buildings (ISO 2631-2)

If the argument is a list, then the first element in the list is taken. If this is also a list, then the process is repeated.

Remarks

The result has the same structure and unit as the argument Signal.

Available in

Option Human Body Vibrations

Observed Standards

Standard

Description

ISO 2631-1:1997

Mechanical vibration and shock - Evaluation of human exposure to whole-body vibration - Part 1: General requirements

ISO 2631-2:2003

Mechanical vibration and shock - Evaluation of human exposure to whole-body vibration - Part 2: Vibration in buildings (1 Hz to 80 Hz)

ISO 2631-4:2001

Mechanical vibration and shock - Evaluation of human exposure to whole-body vibration - Part 4: Guidelines for the evaluation of the effects of vibration and rotational motion on passenger and crew comfort on fixed-guideway transport systems

ISO 5349-1:2001

Mechanical vibration - Measurement and evaluation of human exposure to hand-transmitted vibration - Part 1: General requirements

Examples

VibrationFrequencyWeighting(Signal1, FREQUENCYWEIGHTING_WD)

Filters the 'Signal1' signal using the weighting filter for horizontal vibrations.

See Also

Whole-Body Vibration Analysis Object

Hand-Transmitted Vibration Analysis Object

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