Simulating Aircraft Control: Building a Block Diagram in Simulink

Building a Simulink Model for Aircraft Control

This guide walks you through building a Simulink model to simulate aircraft control. You'll learn how to use blocks from different libraries to represent various components and visualize the output.

Required Blocks:

From the Continuous or Math Library:

• Transfer Fcn Block: Used to represent the 'tail elevator angle normal accel' relationship (see eqn (1)).
• Transfer Fcn Block: Used to represent the 'front fin angle relationship' (see eqn (2)).
• Transfer Fcn Block: Used to represent the hydraulic 'actuator dynamics' (see eqn (3)).
• Gain Block: Used to represent the 'gears' (see eqn (4)).

From the Sources Library:

• Step Input Block: Acts as a test input. Set the Step time to 0 sec and the Final value to 0.01 rad.

From the Sinks Library:

• Scope Block: Used to monitor the pitch rate output. Set the simulation time to 20 sec.

Connecting the Blocks:

1. Connect the Step Input block to the Actuator Dynamics (Transfer Fcn) block.
2. Connect the Actuator Dynamics block to the Gears (Gain) block.
3. Connect the Gears block to the Tail Elevator Angle Normal Accel (Transfer Fcn) block.
4. Connect the Tail Elevator Angle Normal Accel block to the Front Fin Angle Pitch Rate (Transfer Fcn) block.
5. Connect the Front Fin Angle Pitch Rate block to the Scope block.

Block Diagram:

Step Input --> Actuator Dynamics (Transfer Fcn) --> Gears (Gain) --> Tail Elevator Angle Normal Accel (Transfer Fcn) --> Front Fin Angle Pitch Rate (Transfer Fcn) --> Scope

This block diagram represents the flow of signals from the input to the output, simulating the aircraft control system. By analyzing the pitch rate output on the Scope, you can understand how the system responds to the input signal.