P07005: ARC Pool Lift w Adjustable Reclining Seat and Base
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P07005 PRP

Table of Contents

Administrative Information

Project Name
ARC Pool lift with Adjustable Reclining Seat and Base
Project Number
P07005
Project Family
P07000 NSF Assistive Devices
Track
Assistive Devices and Bioengineering
Start Term
2006-2
End Term
2006-3
Faculty Guide
Dr. Elizabeth DeBartolo (ME)
Faculty Consultant
Dr. Mathew Marshall (ISE)
Primary Customer
Heather Margeson - ARC of monroe County.
Secondary Customers
Physical therapists, individuals using the lift.
Customer contact information
Heather Margeson
ARC of Monroe County
h_margeson@arcmonroe.org

Project Overview

The mission of this student team is to develop a fully functional, reclining seat, integrated with the existing ARC pool lift system. The team must provide complete documentation of the analysis, design, manufacturing, fabrication, test, and evaluation of this subsystem.

Staffing Requirements

Staffing
Team Member Discipline Role / Skills email address
Elizabeth DeBartolo ME Faculty Guide, Will work closely with the team on an on-going basis to facilitate success. eademe@rit.edu
Mathew Marshall ISE Faculty Consultant, Will provide ISE discipline technical support on an ergonomic basis. mmmeie@rit.edu
Alvaro J. Rojas ME DPM Student who prepared de PRP ajr1377@rit.edu
TBD Student ISE Project Management, Design of Experiments
TBD Student ISE Ergonomics and Human Factors Design
TBD Student ME System Design, System Integration, Pro-E CAD
TBD Student ME Mechanisms, Manufacturing, Materials Selection, Pro-E CAD
TBD Student ME Stress Analysis, CAE, Pro-E CAD

Continuation, Platform, or Building Block Project Information

The Assistive Devices and Bioengineering Track is focused on the application of technology to improve the quality of life for individuals with disabilities, and the development of technologies related to the broad field of bioengineering.

The mission of each student team contributing to this track is to develop or enhance a particular subsystem for an assistive device, and provide complete documentation of the analysis, design, manufacturing, fabrication, test, and evaluation of each subsystem to a level of detail.

A number of other projects are intimately related to this project, as summarized in the list below.

Related Project Title Start Term End Term
P06216 ARC of Monroe County Therapy Pool Lift 2005-2 2005-3
P07000 Assistive Device and Bioengineering Track 2006-1 On-going
P07001 ARC Communication Board 2006-1 2006-2
P07002 Two-way Communication Board 2006-1 2006-2
P07003 Mobile Camera Control System 2006-1 2006-2
P07004 Mobile Camera Positioning Platform 2006-2 2006-3
P07006 Upper extremity exerciser w Nazareth College's physical therapy department 2006-2 2006-3

Principle Sponsor or Sponsoring Organization

Support for this project is generously provided by the National Science Foundation.

Support for this project is generously provided by the National Science Foundation.

Support for this family of projects is generously provided by the National Science Foundation under Award No. BES-0527358.

Detailed Project Description

Customer Needs

The mission of this project is to develop a reclining seat for the pool lifting system that was developed last year for the ARC of Monroe County, as a part of the assistive devices Track and the projects developed by the agreement with the NSF.

The primary customer, Dr. Elizabeth DeBartolo, representing the mechanical engineering department of RIT, has expressed his objectives for the design project and an additional meeting with the people of the ARC of Monroe County was carried out.

Needs
Number Need Importance
1 The seat must provide support for the back in different positions. 5
2 The seat must be comfortable. 3
3 The seat must fit the existing pool lifting system. 5
4 The seat must be waterproof. 5
5 The seat must resist the use with an adult customer. 5
6 The seat must be safe for the user. 5
7 The user should not slip off the seat. 3
8 The seat must provide support for the arms and the side of the customer. 5
9 The seat should be easy to install in the pool lift. 4
10 The seat should have removable support for the feet. 3
11 The seat must be light weight. 3
12 The system should provide a way to carry the user from the dressers to the pool in the same seat. 2
13 The system shall comply with the ADA regulations for pool lifts. 5
14 The system should look nice. 2
15 The system should be easy to use. 3
16 The system should be reliable. 5
17 The system must have an instruction manual. 5

Voice of the Customer, Objective Tree

These objectives should be addressed in this project as the continuation of the project P06216 developed last year and as a part of the projects in the assistive devices track. Some individual systems within the project may focus on various areas, but all students are encouraged to keep the "big picture" in mind, so that their individual project contributions can be more readily integrated with the larger system view.

  1. Constraint Objectives
    • Regulatory Constraints
      • C.1 The design shall comply with all applicable federal, state, and local laws and regulations. Measure of Effectiveness: Every team shall identify at least one federal, state, or local law or regulation that may have an impact on the system design. The team shall demonstrate compliance with said regulations. Particular attention shall be paid to safety codes and standards related to asistive devices.
      • C.2 The design shall comply with all applicable RIT Policies and Procedures. Measure of Effectiveness: The team shall offer their design for review by the RIT Campus Safety office, and shall rigorously follow RIT procedures associated with purchasing and safety.
      • C.3 The design shall comply with all applicable ARC Policies and Procedures. Measure of Effectiveness: The team shall offer their design for review by the ARC of Monroe County.
      • C.4 The design shall comply with all applicable ADA Regulations (for pool lifts Section A15.8.5)
    • Academic Constraints
      • C.10 The team shall prepare a technical report, including a set of design drawings and bill of materials supported by engineering analysis.
      • C.11 The team shall deliver a full functional seat integrated with the existant lifting system.
      • C.12 The team shall test the system with a user of at least 225 Lb.
    • Safety Constraints
      • C.20 Particular attention shall be paid to assistive devices safety concerns.
      • C.21 Human safety takes precedence over all other design objectives.
      • C.22 Building and facilities safety takes precedence over reclining seat damage.
      • C.23 The reclining seat should be robust to damage by inexperienced operators.
  2. Resource Objectives
    • People Resource
      • R.0 The team shall be comprised of 4 ME and 2 ISE students.
    • Equipment Resource
      • R.10 The team members should fabricate most custom components on campus, and the design should consider in-house manufacturing resources.
    • Time Resource
      • R.20 Each student team member should be expected to work a minimum of 8 and a maximum of 16 hours per week on the project. Each student should ideally spend an average of 12 hours per week on the project. The scope of the project has been designed with these limits in mind.
      • R.21 The reclining seat must be demonstrable at the end of the Spring Quarter 2006-3.
  3. Economic Objectives
    • Materials Costs
      • R.30 The total budget for the project is $1.200 but it may have small variations.
      • R.31 The cost to manufacture subsequent copies of a reclining seat should decrease with increasing volume.
      • R.33 The cost to manufacture subsequent copies of the pool lifting system should decrease with increasing volume.
      • R.34 The cost to manufacture subsequent copies of the pool lifting system or its subsystems should be borne by the team, faculty member, research project, company, or department desiring to use the item for their research and development work.
    • Labor Costs
      • R.40 The design team is not expected to account for the nominal labor costs of RIT shop personnel as long as the time commitment does not greatly exceed that of other typical SD projects.
      • R.41 The design team is not expected to account for the nominal labor costs of TA's, Faculty, or other staff assigned to assist and guide then team, as long as the time commitment does not greatly exceed that of other typical SD projects.
    • Amortization Costs
      • R.50 The design team is not expected to recover the investment costs associated with the platform development.
  4. Scope Objectives
    • S.1 The reclining seat shall be manufacturable in lots as small as one and there is no intentions of manufacture more for the moment.
    • S.6 The reclining seat shall NOT be designed assuming that it is targeted for a commercial product.
    • S.7 The pool lift system design shall be available for use and adoption by other commercially oriented SD teams.
  5. Technology Objectives
    • T.1 The reclining seat shall be made with high quality standars.
    • T.2 The reclining seat shall be safe to use consifering that it will be going into the water with a costumer on the seat.
    • T.3 The results of this pool lifting system development should increase the reputation and visibility of the RIT SD program and our assistive devices track on a national basis.
    • T.4 The reclining seat shall be relocatable by two people, and easily transported through single-width doorways, etc.
    • T.5 The installation of the reclining seat in the existing pool lifting system shall take less than 30 minutes.

Engineering Specifications

Reclining Seat specifications
Figure 1: Existing Pool System

Figure 1: Existing Pool System

Figure 2: Existing Pool System

Figure 2: Existing Pool System

Pool lifting system Specifications

The Reclining seat must be able to meet the following requirements when used together with the pool lift:

Metrics
Number Related Needs Metric Unit Impor.
1 1, 2, 5 Reclining Range deg 5
2 1, 2, 8, 10, 12 Comfort (survey) % 3
3 3, 9 Attachable to the existing pool lifting system. Bin 5
4 4, 7, 16 Waterproof Bin 5
5 1, 5, 11, 13 Effective Load. Lb. 5
6 2, 5 Dimensions. In 5
7 6 Number of Seatbelts. # 5
8 7 Friction coefficient between the user and the seat. 3
9 2, 8 Armrest and Side support Bin 5
10 3, 4, 9 Time to install the seat in the pool lift. min 4
11 2, 10 Removable feet support. Bin 3
12 9, 11 Weight. Lb. 3
13 2, 3, 12, 15 Provide a way to carry the user from the dressers to the pool in the same seat. Bin 2
14 6, 13 Comply with the ADA regulations for pool lifts. Section 15.8.5. Bin 5
15 14 Appearance. Subj. 2
16 1, 2, 15 Time to adjust the seat in a different position. Sec 3
17 4, 16 Time between maintenance. Months 5
18 17 Instruction manual. Bin 5
Preliminary Marginal & Ideal Values
Number Metric Unit Marg Value Ideal Value
1 Reclining Range deg 85 90
2 Comfort (survey) % 90 100
3 Attachable to the existing pool lifting system. Bin Yes Yes
4 Waterproof Bin Yes Yes
5 Effective Load. Lb. 300 350
6 Dimensions. (Seat width x back height) In 18 x 23 24 x 32
7 Number of Seatbelts. # 2 3
8 Friction coefficient between the user and the seat. TBD TBD
9 Armrest and Side support Bin Yes Yes
10 Time to install the seat in the pool lift. min <30 <10
11 Removable feet support. Bin Yes Yes
12 Weight. Lb. 40 20
13 Provide a way to carry the user from the dressers to the pool in the same seat. Bin No Yes
14 Comply with the ADA regulations for pool lifts. Section 15.8.5. Bin Yes Yes
15 Appearance. Subj. 3 4
16 Time to adjust the seat in a different position. Sec <60 <15
17 Time between maintenance. Months 6 12
18 Instruction manual. Bin Yes Yes

Voice of the Engineer, House of Quality

The student members of the team are asked to translate the customer requirements into engineering design specifications. The customer wishes for the student team to develop a complete "Voice of the Engineer" document, and prepare a House of Quality which demonstrates how each customer objective has been effectively mapped to one or more engineering specifications.

The student team may then demonstrate that they have satisfied the customer objectives through measurement and demonstration of satisfying each engineering performance specification. The team should meet with the customer by the mid-point of SD1 to review the house of quality and confirm that the house of quality and engineering specifications adequately capture the customer's intent as expressed by the objective tree.

Figure 3: Preliminary House of Quality (HOQ) done with QFD Capture (Demo Version)

Figure 3: Preliminary House of Quality (HOQ) done with QFD Capture (Demo Version)

Background Information & Useful Web Resources

You may find it helpful to review these web resources to get comfortable with the nature of the project.

Check out this Assistive Devices directory

Some Pool lifts

Other types of lifting systems

Some Portable lifts

About Reclining seat

The ADA Guidelines

ADA regulations

A brand suggested by the costumer: Sammons Preston

Initial Concepts to Consider
  1. Car Seat, defined or variable positions
  2. Airplane seats.
  3. Inflatable contour
  4. Fiber glass design or prototype
  5. Plastic Reclining Seat like shown below
Figure 4: Plastic Reclaining Seat

Figure 4: Plastic Reclaining Seat

Customer Deliverables

Design, build, and test a reclining seat integrated with the existing pool lifting system. See the "Detailed Course Deliverables" section for more specifics.

Customer and Sponsor Involvement

The team will be expected to carry out the vast majority of their interactions with the Team Guide (Dr. DeBartolo), and the faculty consultant (Dr. Marshall). The customer, the ARC of Monroe County, will designate a representant available for a series of meetings during the course of the project. It is anticipated that these representants will meet with the team approximately 3 times during senior design 1 (beginning, middle, and end), and twice during senior design 2 (middle and end). The team will also be in constant contact with the customer throughout senior design, via email, to ensure that all needs are being met. Dr. DeBartolo will participate with team communications electronically, through the web site as well.

Regulatory Requirements

Project Budget and Special Procurement Processes

The National Science Foundation has sponsored the projects within this family. Dr DeBartolo has allocated around $1200 for this project. The team will be required to keep track of all expenses incurred with the project to insure that the budget is being followed. All purchases must be approved by either Dr Marshall or Dr DeBartolo. The team is responsible for providing all receipts, copies of invoices, shipping documents, and proper use of tax exempt forms, etc.

This budget is for producing one reclining seat to be integrated with the existing pool lifting system. The cost to manufacture subsequent copies of the final design should be borne by the customer or physical therapy office that wishes to use the product in their office.

Intellectual Property Considerations

All work to be completed by students in this track is expected to be released to the public domain. Students, Faculty, Staff, and other participants in the project will be expected to release rights to their designs, documents, drawings, etc., to the public domain, so that others may freely build upon the results and findings without constraint.

Students, Faculty, and Staff associated with the project are encouraged to publish findings, data, and results openly.

Safety Constraints

Detailed Course Deliverables

Note that this level describes an absolute level of expectation for the design itself, and for the hardware. However, the student team must also meet all requirements related to analysis, documentation, presentations, web sites, and posters, etc. that are implicit to all projects.

See Senior Design I Course Deliverables for detail.

The following tasks should be completed by the end of SD1:
The following tasks should be completed by the end of SD2:

Preliminary Work Breakdown

The following roles are not necessarily to be followed by the team. It is merely to justify the number of students from each discipline. The student team is expected to develop their own work breakdown structure, consistent with the general work outline presented in the workshop series at the beginning of SD1. However, the customer requests a level of detail NO GREATER than weekly tasks to be completed by each student team member for the benefit of the other team members. The customer DOES NOT request any level of detail finer than one-week intervals, but will assist the team members if they wish to develop a finer level of detail to support their own efforts.

ME:
  1. System Integration, system Design, CAD.
  2. Mechanisms, Manufacturing, CAD.
  3. Stress Analysis, CAE.
  4. Composed Materials, Material Selection.
ISE:
  1. Project Management, Design of Experiments.
  2. Human Factors, Ergonomics.

Grading and Assessment Scheme

Grading of students in this project will be fully consistent with grading policies established for the SD1 and SD2 courses. The following level describes an absolute level of expectation for the design itself, and for the hardware. However, the student team must also meet all requirements related to analysis, documentation, presentations, web sites, and posters, etc. that are implicit to all projects.

For Senior Design 1 the grading will be:

Level D:
The student team will make a complete 3D model of the reclining seat.
Level C:
The student team will deliver all elements of Level D PLUS: An stress analysis for the critical components of the seat.
Level B:
The student team will deliver all elements of Level D and C PLUS: A justified selection of the materials to use in the seat.
Level A:
The student team will deliver all elements of Level D, C, and B PLUS: A prototype for the seat and test the comfort with the team members.

For Senior Design 2 the grading will be:

Level D:
The student team will build and test a basic reclinable seat of 6 positions (in a range of 90 degrees) and integrate it with the existing pool lift. The seat will have armrests and feet support. The system will have a complete instruction manual.
Level C:
The student team will deliver all elements of Level D PLUS: The armrests and feet support will be removable.
Level B:
The student team will deliver all elements of Level D and C PLUS: The seat could adapt an infinite number of positions in the defined range.
Level A:
The student team will deliver all elements of Level D, C, and B PLUS: The reclining system can be easily operated by the user or the assistant with a remote control. The seat will have wheels so the user can go from the dressers to the pool in the seat and then be attached to the lift system without other changes.

Three-Week SDI Schedule

This project will closely follow the three week project workshop schedule presented in SD1. See the Course Calender for Details.

In addition, the following tasks should be completed ASAP:

  1. Go over the information on the edge website, from the Design Project Management Assistive Devices Track and the specific web page of this project.
  2. Learn about composite materials to make prototypes of the seat.
  3. Go over the information in the web resources of this project and explore other pool lift systems and reclining seats.
  4. Analyze the results of the project P06216, The Arc Pool Lift.
Three Week Schedule
Team Member Week 1 Week 2 Week 3
ISE 1 Go over the information on the edge website, from the Design Project Management Assistive Devices Track and the specific web page of this project. Go over the information in the web resources of this project and explore other pool lift systems and reclining seats. Design the schedule for the next quarter of work, define a time line for the project. Prepare a Brainstorm Sesion for Concept Generation. Conduct a Brainstorm Session for Concept generation. Design experiments to test the comfort of the seat.
ISE 2 Go over the information on the edge website, from the Design Project Management Assistive Devices Track and the specific web page of this project. Go over the information in the web resources of this project and explore other pool lift systems and reclining seats. Prepare three concepts for the Brainstorm session. Look for the human factors involved in the design of a seat. Participate in a Brainstorm Session for Concept generation. Go to ARC and other pools to establish the human factors involved in a pool lift.
ME 1 Go over the information on the edge website, from the Design Project Management Assistive Devices Track and the specific web page of this project. Go over the information in the web resources of this project and explore other pool lift systems and reclining seats. Prepare three concepts for the Brainstorm session. Check the existing pool lift to find the best way to integrate the new seat and keep the posibility to interchange the chairs. Participate in a Brainstorm Session for Concept generation. Try to establish the subsystems for the reclyning seat.
ME 2 Go over the information on the edge website, from the Design Project Management Assistive Devices Track and the specific web page of this project. Go over the information in the web resources of this project and explore other pool lift systems and reclining seats. Prepare three concepts for the Brainstorm session. Look for Mechanisms of a reclining seat. Participate in a Brainstorm Session for Concept generation. Define a preliminary mechanism for the reclining seat.
ME 3 Go over the information on the edge website, from the Design Project Management Assistive Devices Track and the specific web page of this project. Go over the information in the web resources of this project and explore other pool lift systems and reclining seats. Prepare three concepts for the Brainstorm session. Look for different type of stress analysis and the appropiate software to do it. Participate in a Brainstorm Session for Concept generation. Begin the 3D model of the concepts that seems to be the most likely after the brainstormig session.
ME 4 Go over the information on the edge website, from the Design Project Management Assistive Devices Track and the specific web page of this project. Go over the information in the web resources of this project and explore other pool lift systems and reclining seats. Prepare three concepts for the Brainstorm session. Look for composite materials for the seat. Participate in a Brainstorm Session for Concept generation. Prepare some prototypes for the seat exploring the possible materials to be used.

Required Resources

Faculty
Item Source Description Available
Prof. DeBartolo ME Faculty Guide/Coordinator/Mentor Yes
Prof. DeBartolo ME Customer Yes
Prof. Marshall ISE Technical Consultant Yes
Environment
Item Source Description Available
Sr Design Lab EE 09-3xxx Work Space Yes
ISE Human Factor Lab ISE 09-xxxx Test of seat designs Yes
ME Shop ME 09-2360 Parts Fabrication Yes
Equipment
Item Source Description Available
Desktop PC Throughout CAD - CAE Unknown

The team members will be expected to procure the materials needed for the project, excluding the following:

Materials
Item Source Description Available
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