グローバル応答曲面法(GRSM)
グローバル応答曲面法(GRSM:Global Response Surface Method)は、応答曲面に基づいた手法です。反復計算のたびに、応答曲面に基づいた最適化によっていくつかの設計が生成されます。追加の設計がグローバルに生成されることで、ローカル検索機能とグローバル検索機能の良好なバランスが確保されます。
エラー処理と終了
適応型の判断により、新たに生成された設計で応答曲面が更新されて、モデルの適合性が向上していきます。
GRSM法のテキストログ
================ L O G - FILE - OPTFEKO ================
Version: 14.0.430-24 of 2016-08-22
Date: 2016-08-30 11:36:21
File: dipole_grsm
OPTIMISATION WITH Feko
================= Optimisation variables =================
No. Name Beg.value Minimum Maximum
1 h 2.000000000e+00 1.600000000e+00 2.400000000e+00
2 radius 2.000000000e-03 5.000000000e-04 5.000000000e-03
=================== Optimisation goals ===================
No. Name Expression
1 grsm.goals.impedance_mag73ohm mag(inputimp(impedance(source)))
=== Optimisation method: GLOBAL RESPONSE SURFACE METHOD (HyperOpt) ===
On failed analysis: Ignore failed analysis (=1)
Maximum iterations: 50
Random seed: 1
Initial sample points: 4
Points per iteration: 2
Constraint violation tol. (%): 5.0000000000e-01
Constraint threshold 1.0000000000e-04
=========== GLOBAL RESPONSE SURFACE METHOD (HyperOpt): Intermediate results ===========
No. h radius grsm.goals.impe Global goal Global best aim
1 2.000000000e+00 2.000000000e-03 8.223708649e+01 9.237086490e+00 9.237086490e+00
2 2.348800000e+00 4.964000000e-03 2.488655725e+02 1.758655725e+02
3 1.678080000e+00 4.942400000e-03 1.120701608e+02 3.907016075e+01
4 2.394880000e+00 9.464000000e-04 3.227940059e+02 2.497940059e+02
5 1.928320000e+00 2.401760000e-03 6.825584105e+01 4.744158945e+00 4.744158945e+00
...
================= GLOBAL RESPONSE SURFACE METHOD (HyperOpt): Finished =================
Optimisation finished (GRSM optimiser stopped. Number of analysis reached the maximum allowed number of
50)
Optimum found for these parameters:
h = 1.957379988e+00
radius = 3.243705368e-03
Optimum aim function value (at no. 47): 4.087626847e-02
No. of the last analysis: 50