Documentation/Modules/BoundHandler

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.
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

Any optimization algorithm proposes a new solution x. Some of the values of x might be outside the lower bounds x_l and upper bounds x_u, specified in the "Problem" module. These variables are corrected to values within the bounds by two different methods:

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) / (x - xu) * (xl- xu);

   else if x > xu, then x = xl + (xu- xl) / (x - xl) * (xu- xl)

Usage

-

Source Code

ToDo:Link to SVN

References

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