Airspeed Indicator

Display measurements for aircraft airspeed

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Libraries:
Aerospace Blockset / Flight Instruments

Description

The Airspeed Indicator block displays measurements for aircraft airspeed in knots.

By default, minor ticks represent 10-knot increments and major ticks represent 40-knot increments. The parameters Minimum and Maximum determine the minimum and maximum values on the gauge. The number and distribution of ticks is fixed, which means that the first and last tick display the minimum and maximum values. The ticks in between distribute evenly between the minimum and maximum values. For major ticks, the distribution of ticks is (Maximum-Minimum)/9. For minor ticks, the distribution of ticks is (Maximum-Minimum)/36.

The airspeed indicator has scale color bars that allow for overlapping for the first bar, displayed at a different radius. This different radius lets the block represent maximum speed with flap extended (V_FE) and stall speed with flap extended (V_SO) accurately for aircraft airspeed and stall speed.

Tip

To facilitate understanding and debugging your model, you can modify instrument block connections in your model during normal and accelerator mode simulations.

Examples

HL-20 with Flight Instrumentation Blocks

Simulate approach and landing flight phases of NASA HL-20 lifting body and controller using an auto-landing controller.

• Open Live Script

HL-20 with Flight Instrument Blocks and Visualization Using Unreal Engine

Model NASA HL-20 lifting body and controller modeled in Simulink^® and Aerospace Blockset™, using Unreal Engine^® for visualization.

• Open Live Script

Parameters

Connection — Connect to signal

signal name

Connect to signal for display, selected from list of signal names.

To view the data from a signal, select a signal in the model. The signal appears in the Connection table. Select the option button next to the signal you want to display. Click Apply to connect the signal.

The table has a row for the signal connected to the block. If there are no signals selected in the model, or the block is not connected to any signals, the table is empty.

Minimum — Minimum tick mark value

40 (default) | finite | double | scalar

Minimum tick mark value, specified as a finite double scalar value, in knots.

Dependencies

The Minimum tick value must be less than the Maximum tick value.

Programmatic Use

Block Parameter: Limits

Type: double

Values: vector

Default: [40 400], where 40 is the minimum value

Maximum — Maximum tick mark value

400 (default) | finite | double | scalar

Specify the maximum tick mark value, specified as a finite double scalar value, in knots.

Dependencies

The Maximum tick value must be greater than the Minimum tick value.

Programmatic Use

Block Parameter: Limits

Type: double

Values: vector

Default: [40 400], where 400 is the maximum value

Scale Colors — Ranges of color bands

0 (default) | double | scalar

Ranges of color bands outside the scale, specified as a finite double scalar value. Specify the minimum and maximum color range to display on the gauge.

To add a new color, click +. To remove a color, click -.

Programmatic Use

Block Parameter: ScaleColors

Type: n-by-1 struct array

Values: struct array with elements Min, Max, and Color

Label — Name of connected signal

Top (default) | Bottom | Hide

Name of connected signal.

• Top

  Show label at the top of the block.

• Bottom

  Show label at the bottom of the block.

• Hide

  Do not show the label or instructional text when the block is not connected.

Programmatic Use

Block Parameter: LabelPosition

Type: character vector

Values: 'Top' | 'Bottom' | 'Hide'

Default: 'Top'

Extended Capabilities

C/C++ Code Generation

Generate C and C++ code using Simulink® Coder™.

This block is ignored for code generation.

Version History

Introduced in R2016a