| タイトル | A study of the optimization method used in the NAVY/NASA gas turbine engine computer code |
| 本文（外部サイト） | http://hdl.handle.net/2060/19770013159 |
| 著者（英） | Horsewood, J. L.; Pines, S. |
| 著者所属（英） | Computer Systems International, Inc. |
| 発行日 | 1977-01-01 |
| 言語 | eng |
| 内容記述 | Sources of numerical noise affecting the convergence properties of the Powell's Principal Axis Method of Optimization in the NAVY/NASA gas turbine engine computer code were investigated. The principal noise source discovered resulted from loose input tolerances used in terminating iterations performed in subroutine CALCFX to satisfy specified control functions. A minor source of noise was found to be introduced by an insufficient number of digits in stored coefficients used by subroutine THERM in polynomial expressions of thermodynamic properties. Tabular results of several computer runs are presented to show the effects on program performance of selective corrective actions taken to reduce noise. |
| NASA分類 | AIRCRAFT PROPULSION AND POWER |
| レポートNO | 77N20103
NASA-CR-135180
AMA-77-1 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/182825 |
