Control and Optimization of Regenerative Power Flow in 21st Century Airlifters.

摘要

In this project we investigated the optimization of the power distribution system and some of its components for 21st century airlifters. Herein we describe the formulation of an optimization problem for typical components found in a power distribution system: an input filter and a buck converter. The optimization formulation includes time and frequency domain constraints as well as optimization of the inductors. An optimization problem is formulated for each of the components, but it is formulated in such a way that the two-optimization problems can be easily integrated into a single optimization problem accounting for internal stability. Using this principle, an optimization problem can be formulated for each component of the power distribution system, and then integrated into the combined optimization of the entire system. An example is given in which the system is optimized to bound the effect of the regenerative power flow onto the aircraft power bus. A bi-Level formulation is introduce which significantly reduces the computational complexity of the optimization problem. It is anticipated that the next generation aircraft will include novel actuators that incorporate piezoelectric material. Since this material is an energy transducer, we can expect these actuators to regenerate power back onto the power bus. To study this effect, models are developed of the actuators and the power flow is investigated as a function of the internal control loops. Then an optimization problem is formulated for the drive amplifiers for these actuators.