Revolute Joint: Actuation by Torque AND Motion

Hi,

for my model i want to actuate a revolute joint by a constant torque and a known motion. This is because I have a constant input rotational speed, but a variying torque.

It works by applying torque and motion separately, but in combination I get the following error:

"In the dynamically coupled component containing Revolute Joint 'Test_Shaft_Gear_3/Revolute Joint', there are fewer joint primitive degrees of freedom with automatically computed force or torque (0) than with motion from inputs (1). The prescribed motion trajectories in this component may not be achievable. Solve this problem by reducing the number of joint primitives with motion from inputs or increasing the number of joint primitives with automatically computed force or torque. Resolve this issue in order to simulate the model."

Is anybody out there to help me?

Answer 1

[Joel Van Sickel]

You cannot apply torque AND motion like this. If you apply torque, the model will calculate what the motion is for you. If you apply motion, the model will calculate the torque for you. So you need to pick only one of them.