Optimal Design of a Hybrid Electric Powertrain System

Optimal design of an electric hybrid powertrain system using a decomposition-based approach is presented. In this approach, a general system design problem is first formulated without specifying objectives. The mathematical model is analyzed using partitioning techniques, and an optimal design problem that can be readily decomposed and solved using an appropriate coordination strategy is derived. Basic concepts for hybrid powertrains in automotive applications and a mathematical design model are introduced. Different ways of synthesizing a hierarchically decomposed optimization problem statement are described, and one such problem is solved using a sensitivity-based coordination strategy.