Recent content by s_aldworth

Ok, that's not how I remember it from my solid mechanics days where we could specify the list of unknowns by studying the mechanism. I don't follow how the acceleration of the body is an unknown if you know its displacement and velocity and the forces acting on it. However... I think that in...

I realize that I need one equation for each unknown. I should have been clearer: what is of interest is to know what the list of unknowns is. For a mass on springs and dampers I assume its displacement and velocity are the two unknowns of interest. Knowing the complete list of unknowns for the...

Here is a full set of equations as they stand at the moment. Body accelerations are a with a suffix for direction, velocities are v and displacements are d. Anything with a 0 in it means the static value. Various equations are needed to get things like ground to body displacement (gb)...

I'll collate the full set of equations and post them here later.

There isn't anything more I can say to describe the model and its parts, so I'll re-write my previous replies in a list of salient facts to see if that brings clarity: 1. The model is a planer front view of a single axle vehicle comprising a body with a suspension system on each side 2. Each...

They are described, but the equations are not included in my post. I have not included everything to keep the post length down and because I am asking for help with the links, not the body.

As I described in my first reply to you, the rc point lies on the line between tc and the instantaneous centre and underneath the CG.

They are described in paragraph 2 (first sentence) and paragraph 4 (second sentence). The forces are FZSL and FZSR shown in the body vertical and moment equations and, in the case of FZSL, in the link vertical and moment equations. It's not just springs in the model, but anti-roll bars and...

Thanks for the welcome. Any vehicle suspension mechanism can be represented at any instant in time by a single virtual link that connects the tyre contact patch centre (tc) to the body. Although in reality it's a 3D link it is often dealt with in two separate planes - the side view and the...

I have run into a problem when trying to model a simplified vehicle that has three degrees of freedom – roll, vertical and lateral motions. It is represented by a single mass with two links that model the suspension behaviour. The links connect the tyre-to-ground contact points (tc) to the body...