Model Joint Mode Faults - Slider-Crank Mechanism

This example demonstrates how to model joint mode faults in a slider-crank mechanism using Simscape™ Multibody™.

The piston-chamber prismatic joint has a Mode Fault configured such that at t=5s, the joint enters Locked mode, simulating the piston jamming. When this joint locks, the input torque to the base-crank revolute joint increases. The crank-coupler revolute joint transitions to Disengaged mode when its constraint force reaches a specified threshold, simulating a breakage.

This model has a Timed fault trigger on the piston-chamber Prismatic Joint, and a Conditional fault trigger on the crank-coupler Revolute Joint. To view Joint Mode Faults, click on these joint blocks, go to the Simscape Block tab, and in the Faults section, click Fault > Fault Table. To modify faults, you can use the Property Inspector by clicking the Property Inspector button in the Fault Table. To define the fault behavior, click the link next to the Fault Behavior. For more details, see Introduction to Simscape Faults.