simple pendulum with reaction force in SimMechanics

In(-1,0.5,0) ,there is a Revolute joint connect with the body on cs1.

In(0,0,0), there is a Bushing joint connect with the body on cs2.

Now,i let the Revolute joint have a initial condition about 45(deg).

And the link is falling down.

IF the cs2 touch the (0,0,0) then there is a reaction force let the link to rebound.

Now,i give a joint actuator to Revolute joint.

let it form 45~-180(deg),it still have the reaction force,but the link doesn't rebound.

The link still work form 45~-180(deg).

How can i do to let the link rebound?

here is my file

https://docs.google.com/file/d/0B_jLEBQ2IJK8QnlISWlucElqeEE/edit?usp=sharing

Answer 1

[Steve Miller]

There are a few ways to model this system.

1. The Spatial Contact Force block will let you model contact between different objects, such as a pendulum and a wall or floor.
2. You can specify limits in Simscape Multibody joints where a spring and damper force is activated when a joint displacement reaches that limit. As an example, see the documentation page for the Revolute Joint.

--Steve