Documentation/Modules/BoundHandler: Unterschied zwischen den Versionen
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! Algorithm | ! Algorithm | ||
| − | | deterministic | + | | deterministic (as no gradient handling is implemented) |
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! Design Variables | ! Design Variables | ||
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==Module Description== | ==Module Description== | ||
| − | + | The optimization algorithm proposes one or several new solutions '''x'''. Some values of '''x''' might be outside the lower bounds x<sub>l</sub> and upper bounds x<sub>u</sub>, specified in the "Problem" module. These variables are corrected to values within the bounds by thress different methods: | |
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| + | 0. no bound handling | ||
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| + | This option turns off the bound handling. | ||
1. set to bounds | 1. set to bounds | ||
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minus infinity, it is set to the upper bound. | minus infinity, it is set to the upper bound. | ||
| − | if x < x<sub>l</sub>, then x = x<sub>u</sub> + (x<sub>l</sub>- x<sub>u</sub>) / (x - x<sub>u</sub>) | + | if x < x<sub>l</sub>, then x = x<sub>u</sub> + (x<sub>l</sub>- x<sub>u</sub>)^2 / (x - x<sub>u</sub>) |
| − | else if x > x<sub>u</sub>, then x = x<sub>l</sub> + (x<sub>u</sub>- x<sub>l</sub>) / (x | + | else if x > x<sub>u</sub>, then x = x<sub>l</sub> + (x<sub>u</sub>- x<sub>l</sub>)^2 / (x - x<sub>l</sub>) |
==Usage== | ==Usage== | ||
Aktuelle Version vom 25. Oktober 2015, 12:26 Uhr
Inhaltsverzeichnis
Summary
Some optimizations require bounds on the design variables xxx. E.g. for the diameter of any mechanical support must be above a certain minimum value.
As not all optimization algorithms include bound handling, the module BoundHandler was created.
Properties
General
| Algorithm | deterministic (as no gradient handling is implemented) |
|---|---|
| Design Variables | continuous variables, discrete or mixed variables are possible. |
| Objectives | any number |
| Constraints | any number |
| Boundaries | Design variables values outside the boundaries are corrected |
| Initial Search Region | not affected |
| Typical X | not affected |
| Initialization | not required |
Connections
| Starting at his module | One connection of type optimization
|
|---|---|
| Ending at this module | One connection of type optimization
|
Actions
| Name | Description |
|---|---|
| - | - |
Options
The options are currently described as "pop-up help".
Module Description
The optimization algorithm proposes one or several new solutions x. Some values of x might be outside the lower bounds xl and upper bounds xu, specified in the "Problem" module. These variables are corrected to values within the bounds by thress different methods:
0. no bound handling
This option turns off the bound handling.
1. set to bounds
If one of the variables x is below or above the bounds, it is set to the bound value, i.e.
if x < xl, then x = xl else if x > xu, then x = xu
2. reflect
If one of the variables x is below or above the bounds, it is reflected from the bound. The reflection is done such that if x goes to infinity, x is equal to the lower bound and if x goes to minus infinity, it is set to the upper bound.
if x < xl, then x = xu + (xl- xu)^2 / (x - xu)
else if x > xu, then x = xl + (xu- xl)^2 / (x - xl)
Usage
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Source Code
ToDo:Link to SVN
References
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