Project 2 - Implement the Code for controlling the retraction and extension of Airplane’s landing gear

Aim: To Implement the code for controlling of retraction and extension of airplane landing gear using finite state machine(FSM)

Objective:

Controlling the direction valve using Pilot Lever.

Controlling of retraction and extension mechannism of Airplane Landing gear using software control.

Principle:

Airplane has actually 3 gears for landing :
1-Nose Gear
2-Left Gear
3-Right Gear

There is a hydraulic pump which is exerting pressure to the gears to bring it down or pull it up and that pump is electrically driven.

Every Leg has a limit swicth and nose gear has one extra switch- Squat Switch to determine weather the airplan is on ground or not.when Gear is Up limit switch status will be closed and when the dear will be down limit switch status will be Open. While for Squat switch if the Plane is on ground its status will be closed and it will be opne state when the plane will be in air.

Direction Valve is controlled by the software to either rais or lower the gear using hydraulic pressure.In case of hydraulic system failure there are two gas pressurised spring by which gear can be extended.