A Parallel-in-Time Adjoint Sensitivity Analysis for a B6 Bridge-Motor Supply Circuit

This article presents a parallel-in-time adjoint sensitivity analysis which combines a transient adjoint sensitivity analysis with the parareal approach to significantly speed up the simulation. The adjoint method is the method of choice to calculate the sensitivities in a many-parameter setting. To obtain sensitivity information that is time-dependent, multiple adjoint problems must be solved. This slows down the simulation wall-clock time and leaves a large optimization potential for the analysis. The parareal is applied to the adjoint solution, significantly speeding up the adjoint solution for every timestep, respectively.