Estimate Center of Gravity

R2026b

Calculate center of gravity location

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Estimate Center of Gravity block

To add a block to a model, double-click the canvas and start typing the block name. Then, select the block from the list.

Libraries:
Aerospace Blockset / Mass Properties

Description

The Estimate Center of Gravity block calculates the center of gravity location and the rate of change of the center of gravity.

Linear interpolation is used to estimate the location of the center of gravity as a function of mass. The rate of change of the center of gravity is a linear function of the rate of change of mass.

Ports

Input

mass — Mass

scalar

Mass, specified as a scalar.

Data Types: double

dm/dt — Rate of change

scalar | 3-element vector

Rate of change of mass, specified as a scalar or three-element vector.

Data Types: | double

Output

CG — Center of gravity location

3-element vector

Center of gravity location, returned as a three-element vector.

Data Types: double

dCG/dt — Rate of change

3-element vector

Rate of the change of center of gravity location, returned as a three-element vector.

Data Types: double

Parameters

Full mass — Mass

2 (default) | scalar

Gross mass of the vehicle, specified as a double scalar.

Programmatic Use

Block Parameter: fmass

Type: character vector

Values: double scalar

Default: '2'

Empty mass — Empty mass

1 (default) | scalar

Empty mass of the vehicle, specified as double scalar.

Programmatic Use

Block Parameter: emass

Type: character vector

Values: double scalar

Default: '1'

Full center of gravity — Full center of gravity

[1 1 1]' (default) | 3-element vector

Center of gravity at the gross mass of the vehicle, specified as a three-element vector.

Programmatic Use

Block Parameter: fcg

Type: character vector

Values: 3-element vector

Default: [1 1 1]'

Empty center of gravity — Empty center of gravity

[0.5 0.5 0.5]' (default) | 3-element vector

Center of gravity at the empty mass of the vehicle, specified as a three-element vector.

Programmatic Use

Block Parameter: ecg

Type: character vector

Values: 3-element vector

Default: [0.5 0.5 0.5]'

Programmatic Use: Add Block

To add the block programmatically, use the add_block function with one of these library block paths as the source.

"aerolibbdyn/Estimate Center of Gravity"

Example: add_block("aerolibbdyn/Estimate Center of Gravity","myModel/myBlock",MakeNameUnique="on")

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced before R2006a