Effect of Variable Selection on Multidisciplinary Design Optimization: a Flight Vehicle Example

Different multidisciplinary design optimization (MDO) problems are formulated and compared. Two MDO formulations are applied to a sounding rocket in order to optimize the performance of the rocket. In the MDO of the referred vehicle, three disciplines have been considered, which are trajectory, propulsion and aerodynamics. A special design structure matrix is developed to assist data exchange between disciplines. This design process uses response surface method (RSM) for multidisciplinary optimization of the rocket.The RSM is applied to the design in two categories: the propulsion model and the system level. In the propulsion model, RSM determines an approximate mathematical model of the engine output parameters as a function of design variables. In the system level, RSM fits a surface of objective function versus design variables. In the first MDO problem formulation, two design variables are selected to form propulsion discipline. In the second one, three new design variables from geometry are added and finally, an optimization method is applied to the response surface in the system level in order to find the best result. Application of the first developed multidisciplinary design optimization procedure increased accessible altitude (performance index) of the referred sounding rocket by twenty five percents and the second one twenty nine.

作 者： J.Roshanian Z.Keshavarz   作者單位： MDO Laboratory, Aerospace Engineering Department of K. N. Toosi University of Technology,East Vafadar blvd, 4th Tehranpars sq., 16579, Tehran, Iran.  刊 名： 中國航空學(xué)報（英文版）  ISTIC 英文刊名： CHINESE JOURNAL OF AERONAUTICS  年，卷(期)： 2007 20(1)  分類號： V2  關(guān)鍵詞： multidisciplinary design optimization   sounding rocket   central composite design   response surface method   equation of motion of a rocket  

【Effect of Variable Selection on Mult】相關(guān)文章：

a domino effect (骨牌效應(yīng) )05-04

Effect of temperature on soil respiration in a Chinese fir forest04-26

Effect of atmospheric precipitation on the dissolved loads of the Dongjiang River,China04-26

Design of Neural Network Variable Structure Reentry Control System for Reusable Launch Vehicle04-26

Effect of substrate concentration on the bioleaching of heavy metals from sewage sludge04-25

Wave-induced stress and estimation of its driven effect on currents04-27

Effect of carbon source and nitrate concentration on denitrifying phosphorus removal by DPB sludge04-26

Exchange Reaction Between Selenite and Hydroxyl Ion of Variable Charge Soil Surfaces: Ⅱ. Kinetics of Hydroxyl Release04-27

Effect of preozonation on improvement of settleability of solid in highly concentrated organic wastewater of Japanese wh04-26

Three-dimensional investigation of velocity skin effect in U-shaped solid armature04-26