P19127: XHab Deployable Crew Lock Structure/public/
Team Vision for Preliminary Detailed Design PhaseDuring the Detailed Design phase, the team reflected on the feedback given during the preliminary detailed design review given by Dr. DeBartolo on the deployment mechanism and budget problems. Using this feedback, a redesign of the deployment mechanism and bulkheads will be made in order to create a more robust deployment mechanism. A greater focus on ergonomics and the deployment system will be used during this redesign process. In addition, the electrical components and schematics will be further detailed out. Finally, the BOM will be completed with all necessary items, and a budget increase request will be made for the BOM items.
Important NoteAll previously displayed feasibility analysis, pictures, and documents in Preliminary Detailed Design involved with the bulkhead, vacuum barrier, and ergonomics are still applicable in this phase. Please download the pre-read design review material in the section at the bottom of this page for a comprehensive package of design documents. The presentation for this phase is also a good representation of everything backing the design of the Crew-Lock up until the Final Detailed Design Review.
Subsystems Design ChartThe updated Subsystems Design Chart for this phase can be seen below:
Phase IV Technical Changes
Change Management DocumentationBelow are the changes made to the Crew-Lock design during this phase. The Change Management Excel sheet can be downloaded in the Design Review Materials Section at the bottom of this page.
Customer RequirementsThe Customer Requirements can be downloaded the Design Review Materials Section at the bottom of this page.
Engineering RequirementsThe Engineering Requirements can be downloaded the Design Review Materials Section at the bottom of this page.
Project Requirements ConfirmationBelow is a document that outlines the fulfillment of Engineering and Customer Requirements by Subsystems and Test Plans. This Excel sheet can be downloaded the Design Review Materials Section at the bottom of this page.
Feasibility: Prototyping, Analysis, SimulationThe first analysis involves the feasibility of the threaded rod deployment system.
Schematics, Drawings, Prototypes, and 3D Models
3D CAD Models of Crew-Lock and Test RigBelow are various CAD model views of the 1/4th scale Crew-Lock concept and the testing rig. The parts have been given mechanical properties and appearances similar to the actual items to be purchased on the BOM. Inaddition, the Electrical schematics are displayed below, The CAD files for both electrical and mechanical components can be downloaded from the Design Review Materials section at the bottom of this page.
Electrical and Controls Schematics
Process Flow Diagram
Bill of Material (BOM)Below is our detailed BOM, BOM breakdown, and Lead Times summary. The information can be downloaded from the Design Review Materials section at the bottom of this page.
Test PlansBelow are our test plans for the Crew-Lock subsystems. These test plans will be further fleshed out during the Build and Test prep phase of this project. The Excel sheet can be downloaded from the Design Review Materials section at the bottom of this page.
Risk AssessmentBelow is an summary of changes to the risk management file. The full risk management file can be downloaded in the Design Review Materials Section at the bottom of this page.
Conclusions for this PhaseDuring this phase, the team was able to receive a budget increase, which increased the project budget to $1500. This new total allowed the team to increase the quality of the electrical system (creation of a PCB), put in more effort into ergonomics (more handles and lighting), and create a new deployment system from scratch (threaded rods). This budget increase did not expand the overall project's scope; in fact, the scope decreased as the team decided that the hatches would not be implemented into the full-scale model due to the lack of air-tightness and actual functionality or worth to the project. Electrical and Mechanical CAD were given more detail, and the BOM was populated to include all required components for the building of the final, scaled Crew-Lock.
Tasks to Complete for MSD II
- Order materials for Crew-Lock
- Create manufacturing method and process for Crew-Lock
- Assign manufacturing tasks to group members
- Finalize MSD II Gantt chart
- Review MSD II Gantt on 1st day back w/ team to confirm semester actions & goals
Below is an image of the MSD II schedule. The Excel sheet can be downloaded from the Design Review Materials section at the bottom of this page.
Detailed Design Phase Review Notes
|Starting Date||Ending Date||Meeting Notes|
|November 2018||December 2018||Design Review Notes - Detailed Design Phase|
Design Review Materials
- Final Detailed Design Review Slides
- Change Management System Sheet
- Engineering Requirements
- Engineering and Customer Requirements Confirmation Matrix
- Test Plans for Subsystems
- Crew-Lock ME CAD Files
- Crew-Lock EE CAD Files
- Electrical / Control System Flow Chart
- Electrical / Programming Flow Chart for the Control Systems
- GUI Example
- Handles and Lighting Analysis
- Vacuum Barrier Material Selection Pugh Chart
- Threaded Rod Deployment Feasibility
- Pump Power to Crew-Lock Volume Analysis
- Wood Screw Thread Engagement and Torque Analysis
- Vacuum Barrier-Bulkhead Sealing Analysis
- Pressure Stress Analysis
- Ergonomic Analyses
- Final Crew-Lock BOM
- Risk Management
- Master Schedule