文档介绍：Massachusetts Institute of Technology
Department of Electrical Engineering puter Science
Electric Machines
Class Notes 11: Design Synthesis and Optimization February 11, 2004
c 2003 James L. Kirtley Jr.
1 Introduction
The notion of “Optimization” is, at first blush, fairly straightforward: it is finding a set of machine
dimensions, materials, methods of assembly and so forth that constitute the “best” machine. In
principle, it should be possible to figure out which machine is best and perhaps even to teach a
computer program to seek out the optimal machine.
There are a few problems with this, however. The first and most difficult problem is that there is
usually no way of knowing what the “best” machine is, a priori. All physical systems have a variety
of attributes, and usually tradeoffs need to be made between them. Even if an appropriate set of
tradeoffs has been made so that there is a scalar objective function, the design space plicated
by the existence of integer and integer-like variables plex limits. In this chapter of the
notes we will look at a small set of ways of handling this situation.
Requirements
Comparison Generation of
Dimensions, etc.
Finished
Design Synthesis Design
Attributes Evaluation
Figure 1: Design Synthesis
Design Synthesis
Illustrated in Figure 1 is a schematic representation of the design pr