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# Whell balancing machine

## Whell balancing machine

(OP)
I need help to understand the vectors action in a L
configuration (two piezoelectrics, one radial and other
axial). I can measure amplitude and fase but now I need
information to calculate the corretion's mass for two
plane balancing.
Thank you
Replies continue below

### RE: Whell balancing machine

Hi RGFerreira
There is a Balance Software in www.denysschen.com.
It is very good.

Att
Mangua

### RE: Whell balancing machine

rb1=vibA*tA1+vibB*tB1

rb2=vibB*tB2+vibA*tA2

all are vectors. * is vector multiplication, ie phase angles are added, moduli are multiplied.

rb = required balance, vib is the measured vibration, t is the influence vector or transfer function.

A is one accelerometer, B is the other. The corrections are applied at planes 1 and 2 on the wheel.

't's will be constant for a given wheel and tyre. I doubt that they can be determined analytically with sufficient accuracy.

Cheers

Greg Locock

### RE: Whell balancing machine

(OP)
mangua and GregLocock, thank you for your help,
every help is very good.

RGFerreira (Renato Gabelini Ferreira)
renatogferreira@uol.com.br

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