|
PROBLEMS IN COMPLEX
ENGINEERING SYSTEM OPTIMIZATION DESIGN AND ALTERNATIVE SOLUTION
LI Xiang1 LI Weiji2
(1. School of Mechatronics, Beijing
Institute of Technology, Beijing 100081;
2. School of Aeronautics,
Northwestern Polytechnical University, Xi’an 710072)
|
|
Abstract: Problems
of low efficiency, low accuracy and complex information exchange in the
application of conventional optimization approach to complex engineering
system optimization design are pointed out. Reasons for the presence of
these problems are explained in detail by analyzing the calculation
process of complex system optimization. The response surface method is
introduced to solve these problems, based on which an iterative method
of series response surface is presented. In this method, complex system
analysis is replaced by response surface model analysis and a database
of the complex system is constructed. At each iteration, the database is
expanded through new added data and then the response surface model is
refined according to the expanded database, which makes the response
surface model more and more accurate until convergence is achieved.
Moreover, to decrease the amount of computation while retaining high
accuracy, this method provides a systematic way of choosing the new
added data. In the last section, a large-scale transporter wing design
problem is solved successfully by this series response surface method,
which shows the validity of the method.
Key words: Response
surface method Complex engineering system Optimization
CLC No: TH122
国家自然科学基金资助项目(10377015). Received
20050809, received in revised form 20060227
|