Simulating Models

SimMechanics provides specialized solver technology for simulating multibody mechanical systems. You can perform different types of analyses, including forward dynamics, inverse dynamics, and kinematics. You can apply forces and torques to your machine and see the resulting motion, or specify motions and calculate the forces and torques required to produce that motion. With these capabilities, you can generate and test requirements for actuation systems, or see how a prosthetic limb would move.

Using state targets, you can guide the assembly of your mechanism, specifying only key information. You can provide optional target joint positions and velocities and specify whether the targets should be met exactly or approximately. SimMechanics uses these values and priorities to automatically assemble and determine the initial state of your mechanism. A report informs you how closely SimMechanics met your state targets and the assembled values.

Guiding Mechanism Assembly 3:52
Specify exact and approximate initial states, including positions and velocities. Review assembly results in a model report.

SimMechanics automatically creates a 3D animation during simulation. You can replay it without rerunning the simulation. You can also display your simulation results during simulation using Simulink scopes. You can use MATLAB scripts to postprocess and plot the data.

SimMechanics model of a four-bar linkage.
SimMechanics model of a four-bar linkage. The simulation results can be reviewed in a 3D animation (top left) or on Simulink scopes (top right), while a Model Report (bottom) shows details about the assembly of your model, including initial conditions.
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