MAE 4182
Lecture 04Block Diagrams

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Lecture 04

Block Diagrams

Last time: one system, one transfer function.
Today: connect the blocks and find the overall Y/U.

Simplified aircraft pitch feedbackDesired pitch enters a negative summing point. Its difference from measured pitch goes through a controller, an actuator, and the aircraft. Measured pitch returns to the negative summing input. This is a conceptual illustration, not a detailed aircraft model.+−ControllerActuatorAircraftDesired pitchPitchMeasured pitch

A simplified flight-control example: command → controller → actuator → aircraft, with measured motion returned to the controller.

We will learn three connections: series, parallel, and feedback.