Thanks Greg and Denial for the feedback.
I should not have stated 'hanging'. The assemblage of parts are all bolted together. The Center of Mass of all these bolted parts are however some decent distance below the carriage of actuator. So there is a pendulum (ringing/vibrating) response of...
A mounted set of plates, tooling, etc. are mounted to a linear actuator that is mounted parallel to the ground. The actuator will decelerate at a known rate per the parameters in the servo controller. I am most interested in comparing two different styles of designs (plates, tooling, etc.)...