Simulation and analysis of a dynamic system using a hybrid computer is described in this paper. We consider a cart mounted two inverter pendulums as an example of this model. Both of pendulums are set up an only control force which moves the cart back and forth. We investigated about setting up a large number of pendulums which have each different eigenvalue in the analytical study. From the preceding result, we could confirm the condition of setting up pendulums by the non-linear control switching on normal coodinates and examine situations of pendulum's motion in detail.
