P19008: Motorized Pediatric Stander
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Systems Design

Table of Contents

Team Vision for System-Level Design Phase

TEAM PLANS:

ACCOMPLISHMENTS:

Functional Decomposition

The objection of this phase was to become familiar with the existing P17045 prototype, identify design flaws, and come up with solutions to fix the design flaws. The existing prototype does not utilize data from the IR/bump sensor in the control system, has jerky movements, cannot move in a straight line, does not have diagonal movement capabilities, the multiple inputs into the control system are not used in concert or prioritized, does not have the desired aesthetics needed for marketing, and no longer supports bluetooth for controls. Some of the jerky movements of the wheels can be seen in the video in this link: https://drive.google.com/drive/folders/0B-PtqaJsCjwqODYtR2tCUFRUSHM

Our goal is to get the device to a point where motion is smooth and consistent, the inputs from multiple sensors and user inputs are incorporated and prioritized accordingly, can move diagonally, controls are supported by bluetooth, and is aesthetically pleasing to customers. If time permits the team would also like to incorporate a lidar sensor and interchangeable controls into the motorized stander. Constraints and considerations that need to be considered in the design include: ease of use for user, ease of assembly by caregiver, efficient use of overall energy, can be completed by spring '19, packageability, cost, electrical safety, collision safety, efficient use of materials, ergonomics, ease of disassembly, user motion, manufacturability, meeting engineering requirements, and compatibility with the previous prototype software.

Functional Tree Diagram

Functional Tree Diagram

Transformation Diagram

Transformation Diagram

Benchmarking

Benchmarking comparing Jazzy 600 ES and Karman Stan-Up Power Wheelchair

Benchmarking comparing Jazzy 600 ES and Karman Stan-Up Power Wheelchair

Previous Device Benchmarking

Previous Device Benchmarking

Concept Development

Concept Generation

Concept Generation

Feasibility: Prototyping, Analysis, Simulation

Morphological Chart and Concept Selection

Morphological Chart

Morphological Chart

Pugh Chart for Concept Generation (Datum is based off the P17045 prototype)

Pugh Chart for Concept Generation (Datum is based off the P17045 prototype)

Concept Selection

Concept Selection Criteria:

Concept Improvement:

Systems Architecture

Low Level System Architecture:
System Architecture

System Architecture

High Level System Architecture:

System Architecture

System Architecture

Designs and Flowcharts

Functional Flowchart:
Flowchart

Flowchart

Risk Assessment

Link to updated Risk list: Risk Management

Design Review Materials

Link to Design Review Presentation:Design Review 2

Plans for next phase

Link to project plan: Project Plan

Link to folder with individual 3 week plans: https://drive.google.com/drive/u/0/folders/1hA_1W6-wyR60Gk_4_US6cbCIeRIwA83-?ogsrc=32


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