雅可比矩阵记录和分析

The Solver Profiler supports Jacobian logging and analysis for implicit solvers.

Open thessc_pneumatic_actuator模型中,点击Debug, selectSolver Profilerfrom thePerformance Advisordrop down menu.

You can select theModel Jacobiancheck box in the Solver Profiler to log updates to the Jacobian matrix for the model. When you run the Solver Profiler on a model, you can see the logs in theJacobian Analysistab. ClickRunto start simulation.

TheJacobian Analysistab indicates the states in the model that are likely slowing down the solver.

Once the simulation completes, you should be able to find the logs in theJacobian Analysistab in the Suggestion Pane. TheJacobian Analysistab indicates the states in the model that are likely slowing down the solver.

If you selectJacobian Updatefrom theViewsection of the toolstrip, you will see that the Jacobian updates are displayed on theStep Sizeplot as black dots.

The log shows 448 Jacobian updates in total. To highlight the target block in the model, select a row of the table in the select a row in theJacobian Analysistab and clickHighlight Block. The information displayed should be helpful to investigate the cause of each limiting state.

See Also

solverprofiler.profileModel|Zero Crossing Explorer|States Explorer

Related Topics

• Examine Model Dynamics Using Solver Profiler
• Solver Resets
• Zero-Crossing Events
• Solver Exception Events