Advanced Mechanical Design Major Assignment - Aircraft Front Landing Gear Linear Actuator Design

Your team's (group of 4 students) task is to design a linear actuator that can lower and raise the front landing gear of an aircraft. The linear actuator will use a power screw that is driven from a hydraulic motor via a gearbox. The hydraulic motor specifications are documented below. Your team must design the entire gearbox and power screw actuator that is mounted between the fuselage and landing gear linkages, as illustrated in the image below.

The complete design will need to include the following:

• Load calculations
• Gear sizing
• Bearing specification
• Shaft design
• Gearbox housing design
• Power screw sizing
• Fastener size specification
• And designs of any other fixtures or housings that you require

Notes and Assumptions:

I. Neglect main strut drag and landing gear weight

II. Ignore thrust bearing friction on the power screw

III. Assume 0.1 friction coefficient between nut and screw of the power screw

IV. Assume there is no loss in aerodynamic drag as the wheel retracts into the fuselage

V. Assume that the hydraulic motor has a constant power curve

VI. The gearbox should be serviceable

VII. The gearbox should include oil fill and drain locations

VIII. This gearbox should be designed for an aeronautical application

IX. The final design should be a complete ready-for-manufacture design

The assignment deliverables for the design are as follows:

1. A complete set of design documents for the assembly:

A design report that details:

• Product design specification
• Manufacturing details (including processes, off-the-shelf components, required treatments, etc.)

An analysis report that covers:

• Load calculations (prior to further analysis)
• Strength calculations
• Failure analysis calculations of component(s)/assembly where applicable
• Finite Element Analysis of structural components

A complete set of manufacturing drawings - fully dimensioned of all parts ready for manufacture (Note: this excludes the motor, gear tooth profiles and bearings)

SolidWorks 3D model (or equivalent CAD model that can be opened within SolidWorks) of the complete actuator assembly and components. Printed (hardcopy) images of all the components in your design are required along with electronic files of the parts and assemblies.

2. Presentation: An informal 5 minute presentation of your group's design to the class during the final lecture.

3. Teamwork: Cooperate as an effective team with suitable load sharing.

4. Report: All aspects for a quality report, such as grammar, referencing, presentation, etc.

Attachment:- Assignment Files.rar