### One step forward to measure the weigth of a chassis

Posted:

**10 Apr 2018, 17:39**Hi to all,

I would like measure the weight of a chassis. As the admin advices I studied the Ackermann steering car. Really, if I put a graph I see 4 curves two by two equals, right. I tried to do the same, so in to the scene:

1. add a cuboid

2. link ,with the cuboid, 4 vertical prismatic joints >motor enabled > control loop enabled > spring damper mode

3. link ,with the prismatic joints, 4 wheels

4. I respect a single planar symmetry

5. add graph > joint force e torque > 4 prismatic joints

6 I measure 4 different values of forces: wrong, I was expecting 2 by 2 equal forces.

7. It is verified the equation (M_chassis*g=F_pJ1+F_pJ2+F_pJ3+F_pJ4): right

8. The curves that I graph from Ackermann car are smouther than the others that have very much noise!

Does Someone has any suggestion?

NB Before write I tried to find a solution without success.

NB I can't know how to attach an image.

Thanks in advance

Sirx

I would like measure the weight of a chassis. As the admin advices I studied the Ackermann steering car. Really, if I put a graph I see 4 curves two by two equals, right. I tried to do the same, so in to the scene:

1. add a cuboid

2. link ,with the cuboid, 4 vertical prismatic joints >motor enabled > control loop enabled > spring damper mode

3. link ,with the prismatic joints, 4 wheels

4. I respect a single planar symmetry

5. add graph > joint force e torque > 4 prismatic joints

6 I measure 4 different values of forces: wrong, I was expecting 2 by 2 equal forces.

7. It is verified the equation (M_chassis*g=F_pJ1+F_pJ2+F_pJ3+F_pJ4): right

8. The curves that I graph from Ackermann car are smouther than the others that have very much noise!

Does Someone has any suggestion?

NB Before write I tried to find a solution without success.

NB I can't know how to attach an image.

Thanks in advance

Sirx