When creating a model, we often take the forward approach. This involves providing several inputs, applying them to the model, and then observing the effects on the simulation. However, what if you are dealing with the opposite type of modeling scenario, in which you already have a set of results that you are trying to match to the model outcome? In COMSOL Multiphysics®, you can estimate the values of the inputs in a model by performing a parameter estimation study.
The Parameter Estimation study step enables you to estimate the value of one or more parameters so that the computational results match the reference data. It provides a simplified interface through which you can efficiently prepare, set up, and solve a least-squares optimization problem. As such, this study lends itself to a variety of inverse modeling problems; namely parameter estimation and curve fitting applications. By estimating the values for the model inputs and finding the optimal values that best match the model data and reference data, you can obtain valuable insight into various aspects of your simulation.
In this video, we demonstrate how to perform a parameter estimation study using a modified version of the elbow bracket tutorial model. Please note that you must hold a license for the Optimization Module in order to utilize the study step.
Tip: You can learn more about the parameter estimation functionality in this blog post: How to Use the Parameter Estimation Study Step for Inverse Modeling