All relevant documents are located here: Detailed Design Documents
Team Vision for Preliminary Detailed Design Phase
The goal of this phase is to further analyze our concept design. During this phase, we have prototyped and simulated parts of the system. We have also come up with a bill of materials and test plans for the device.Block Diagram
Engineering Requirements
Updated Engineering RequirementsThe notes from the observed training can be found here
Use Cases
Our use cases are unchanged from before.Electrical System
Links to datasheets can be found in BOM lower down on page.Weight measurement/Pressure, force sensors
Feasibility can be found hereElectrical Schematic
Can be found hereData structures
Resource/Template for Arduino Registers
Snapshot of Events
Finite State Machine
Timing Pseudo Code/Template
Speed Pseudo Code/Template
Foot Pedal Embedded Flow Control
Emergency Shut-Off Embedded Flow Control
Mechanical System
Treadmill CAD: Drawings can be found hereMotor Selection
Motor Selection was aided by acquiring a treadmill and testing the treadmill for the required torque with a static 50 lbs weight applied to belt. There are two main requirements for the motor:- Able to hit 2mph at max RPM, Using a 2 pulley system
- Provide the Required start up Torque to the belt through the pulley system
Possible DC Gearmotors:
Final two selected motors:
Analysis for MDF Board
Stress and Life analysis were calculated for the current MDF board design.Important Assumptions:
- Load applied as point load in middle of board
- Homogeneous Isotropic Material
- Board can be analyzed as a Beam
Factor of Safety: Xs=17.613
Life: 1.84*1015 cycles
The Analysis can be found here
Step Length Feasibility
The below values are preliminary pending part selection. Calculation was done to ensure that our treadmill could accommodate an average two year old. The max length of treadmill is 25".The current max available tread length is 23".
ASTM Standards:
Tension System: (picture)
Purpose
The system architecture supports our analysis and feasibility from above.Bill of Material (BOM)
Bill of Material with links to each subsystem can be found hereTest Plans
Test plan live document can be found hereRisk Assessment
Risk assessment live document can be found herePlans for next phase
Stay in contact and work with Subject Matter Experts for verification.Electrical
Professor Hoople for motors and analog, our guide Professor Slack or Professor Indovina if digital or coding problems arise.
Mechanical
Professor Boedo
Individual Plans
Individual 5 week plans can be found in the Individual 5-Week Plans subfolder.An overview of what we want to accomplish and when can be found here
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