COMSOL Multiphysics^® 6.4 リリースハイライト

For users of the Uncertainty Quantification Module, COMSOL Multiphysics^® version 6.4 introduces support for frequency- and time-dependent quantities of interest (QoIs) and allows user-defined measurement uncertainty for inverse uncertainty quantification (UQ). Learn more about these updates below.

Frequency- and Time-Dependent Uncertainty Quantification

The Uncertainty Quantification Module now supports frequency- and time-dependent QoIs, enabling efficient UQ analysis without running additional simulations. All computed frequency points or time steps from the underlying study can be directly used to perform screening, sensitivity analysis, uncertainty propagation, and reliability analysis. This enhancement applies to any frequency- or time-dependent model and is especially useful in applications such as RF, acoustics, MEMS, and battery simulations, where performance often depends on frequency- and time-dependent responses. It is now possible to explore how uncertainty in input parameters propagates across the full frequency or time spectrum. The Piezoelectric Energy Harvester with Uncertainty Quantification tutorial model demonstrates this new capability.

The Uncertainty Quantification study now supports frequency-dependent QoIs, enabling UQ analysis of all QoI expressions that vary with frequency.

User-Defined Measurement Uncertainty for Inverse UQ

Inverse UQ studies now support user-defined measurement uncertainty, offering improved flexibility in parameter calibration. This enhancement makes it possible to explicitly define the measurement uncertainty associated with experimental data. When the measurement uncertainty is known, including it in an inverse UQ study enables more precise calibration of input parameters. In cases where the measurement uncertainty is unknown, it can be jointly estimated alongside the calibrated input parameters.

The Uncertainty Quantification study now supports user-defined measurement uncertainty from experimental data settings for inverse UQ studies.

New and Updated Tutorial Models

COMSOL Multiphysics^® version 6.4 brings new and updated tutorial models to the Uncertainty Quantification Module.

Piezoelectric Energy Harvester Uncertainty Quantification*

This tutorial model shows how UQ analyzes the impact of manufacturing variations on a piezoelectric energy harvester with frequency-dependent power output. The surrogate models shown illustrate the relationship between output power and two input parameters for eight distinct frequency values.

Application Library Title:
piezoelectric_energy_harvester_uncertainty_quantification
Download from the Application Gallery

*Requires the AC/DC Module and the Acoustics Module

Uncertainty Quantification of Poroacoustic Parameters in a Transverse Isotropic Porous Material*

This example model studies the influence of material property uncertainties on the acoustic performance of a porous layer. The graph shows the total Sobol indices for a set of poroacoustic parameters evaluated over a full range of operating frequencies.

Download from the Application Gallery

*Requires the Acoustics Module

Uncertainty Quantification of a Resistor

This example demonstrates how UQ can be used for a metal-film resistor. The resulting kernel density estimation (KDE) plot shows the probability distribution of the predicted resistance, with the highest probability density occurring around 50 Ω.

Download from the Application Gallery