Table of Contents
Team Vision for Problem Definition PhaseTEAM PLANS
- Review PRP document to understand the objective of the device.
- Interview the primary customer to learn the main goals and requirements for the device.
- Research and review the previous generations of the pediatric stander.
- Develop use case scenarios.
- Develop a list of team values and norms.
- Develop Customer and Engineering requirements and run a risk analysis.
- Develop a project plan for the next 3 weeks.
- Project statements, use scenarios, team values, and norms were developed and documented.
- Interviewed customer and listed out requirements with key deliverables.
- Interviewed Andrew Kowalczyk, Electrical Design Lead of a previous MSD team (P17045), to learn where the project was left off and the potential design problems that can be avoided.
- Developed an interim list of engineering requirements based on both interviews.
- Developed a list of potential risks:
- Technical Risks
- Resource Risk
- Safety Risks
- Environmental/Social Risks
Project SummaryPediatric standing devices are often prescribed by physical therapists to children with a variety of neuromuscular conditions. The benefit of these devices ranges from musculoskeletal; including increased bone mineral density, the range of motion and spasticity, to esteem benefits that allow a child to interact with their environment and peers while standing. Our project focuses on the addition of motorized wheels and a control system which allows the standing device to become mobile. The increased mobility of the standing device can make the prescribed standing timeless unpleasant, and perhaps even fun for the child.
The previous teams that have worked on this device have created a mobilization kit that can be attached to the stander. This kit includes motorized wheels, a microcontroller, and button controls for the child to interface with. The kit also implements a remote control override to be used by an adult supervisor; either a parent, teacher or therapist. The kit has integrated bump sensors, and an infrared sensor to detect obstacles and potentially dangerous ledges. The data from these sensors have not been utilized in the control system of previous iterations. While the kit is operational, the motion of the stander is sub-optimal. The start and stop motions are jerky and the stander cannot move diagonally. In addition to motion control, the multiple inputs into the control system are currently not used in concert and are not prioritized. Also, the current kit does not have the desired aesthetics necessary for marketing to a wide range of customers.
This year our team will incorporate the inputs from the multiple sensors and controls into the system. The project will focus on developing an algorithm to manage a large amount of data from the inputs and make it useful to the user experience. The device also needs thorough testing and validation because it will be used to support the full body weight of a child; safety is of the utmost importance. Our team will develop a rigorous testing procedure and implement these safety tests to verify device operation and safety. The project should deliver a device that has passed our designed safety testing and is able to process and react to all data inputs appropriately. In addition, the kit will be delivered in a form that is both marketable and fun for kids.
Use CasesScenarios: Assembly: The parent or caregiver must assemble the kit to the stander.
Home Use: The pediatric user is prescribed standing time at home, and would like to move around the house while standing.
School Use: The pediatric user is prescribed standing time during school hours, and the user would like use the stander to interact with other students.
Project Goals and Key DeliverablesDeliverables
- A working prototype of the kit that shall cost $1500/kit and has passed designed safety tests and can process and react to all data inputs.
- Design the kit for manufacturing in larger quantities (>100) for $500/kit.
- Demo at ImagineRIT
- Documentation of all design and manufacturing
- Technical Paper about the project
- Meet all customer requirements.
- Motion is smooth and consistent.
- The inputs from the multiple sensors and user inputs are incorporated.
- Developed an algorithm to manage and utilized data from the inputs.
- Thorough safety testing and validation.
Customer Requirements (Needs)
The live document can be found here: here
Engineering Requirements (Metrics & Specifications)
The live document can be found here
- The kit will weigh no more than 20lbs.
- The kit will fit into the mechanical envelope of LxWxD.
- The team shall develop a testing procedure to ensure the safety of the patient with reference to ASTM Standards. The kit shall not alter the existing safety constraints of the stander including but not limited to: void warranty of the stander, void liability coverage if it exists, jeopardize any clinical practice (technique or clinical research) or institution wherein these practices exist.
House of QualityThe live document can be found here: here
Design Review Materials
Include links to: Design Review 1: The live document can be found here: here
- Presentation and/or handouts
- Notes from review
- Action Items
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