Calculation of Roll stiffness, Roll Gradient, Turning Radius and suspension frequency

Hello Everyone,

I have prepared working MBD model of front trailing arm suspension with pitman arm steering. I am able to run all kinematic analysis events on it.

I gone through all predefined sdf outputs available but not able to find above parameters anywhere. 

We want to calculate those parameters regarding our vehicle for corelation and validation of our design.

Can anyone help me out for calculation of those parameters?

1. Roll Stiffness (Laden & Unladen)

2. Vertical Stiffness (with and without stabar)

3. Turning Circle Diameter

4. Suspension Frequency and Pitch Frequency (Laden & Unladen)

5. Roll Gradient

Thanks and Regards,

Sudip Chavan