SOLID WORKS CALCULATE IMPACT FORCE ON THE BASIS OF THE IMPACT FUCNTION WHICH IS GIVEN BY

IMPACT(x,x',x1,k,e,cmax,d)

What are values of x, x' and x1? How do i get or calculate these parameters or variables for a single link manipulator?

k,e.cmax and values of d are predefined in soldiworks for specific material.