Friction clutch with input control
Simscape / Driveline / Clutches
The Logic-Controlled Clutch represents a logic-controlled mechanism that transmits rotational power through friction. The block is an advanced version of the Fundamental Friction Clutch block. You control the Logic-Controlled Clutch block with physical signal at port E.
If the clutch is engaging and in motion, the block applies the kinetic torque. If the clutch is engaging and not in motion, the block applies the static torque.
E — Control clutch engagement
Physical signal port associated with the clutch logic.
Transition model — Clutch engagement parameterization
First-order lag |
Scaled by input
Clutch engagement transition control. When you select:
Instantaneous— The clutch engages when the input signal at port E rounds to 1, and the clutch does not engage when the input signal rounds to 0.
First-order lag— The block introduces a first-order delay to the clutch engagement according to the value that you specify for the Transition time constant parameter.
Scaled by input— The block smooths the signal input at port E. The block applies full static and kinetic friction when the input signal is greater than or equal to 1 and no static or kinetic friction torque when the signal is nonpositive. The block linearly scales the friction torques when the input signal is between 0 and 1.
Transition time constant — First-order lag time constant
s (default) | positive scalar
Time constant for first-order lag clutch engagement.
To enable this parameter, set Transition model to
Kinetic friction torque — Kinetic friction torque threshold
N*m (default) | nonnegative scalar
Minimum torque threshold to maintain relative motion between the clutch plates.
Static friction torque — Static friction torque threshold
N*m (default) | positive scalar
Minimum torque threshold to cause relative motion between the clutch plates.
Clutch velocity tolerance — Motion boundary condition
rad/s (default) | nonnegative scalar
Clutch minimum angular velocity.
Initial State — Clutch condition at simulation start
Option to start the simulation with the clutch unlocked or locked.