Table of Contents
Team Vision for System-Level Design Phase
- Identify Engineering requirement-Function relationship.
- Brainstorm possible subsystems.
- Benchmark comparable designs.
- Identify possible subsystem designs.
- Determine design feasibility for each subsystem.
- Illustrate associated risks relative to chosen designs.
- Complete initial testing parameters.
The Functional Decomposition identifies the functional components of the engineering requirements. Through the identification of these components it is possible to improve development of the subsystem and make sure that it meets the requirements set forth in the engineering requirements.
Benchmarking enables the design team to establish a baseline for possible concepts by comparing to existing products. Possible trade offs in design can be determined through this technique and needs that are not being fulfilled by existing products can be identified. Currently, there is no commercially available mobility assisting devices for cats, so therefore dog carts were used to develop a baseline. It is important to note that while benchmarking does help to establish a greater understanding of design requirements, a dog is distinctly different from a cat in terms of engineering and ergonomic requirements.
The Morphological Chart details possible designs and concepts for each function of the product in question. The idea is to then discuss the relative merits and issues with each concept and combine them in the most mutually beneficial combination to produce the best overall concept.
The Selection Criteria outlines the desired features that must be taken into consideration when examining possible subsystem designs. In addition, these features were considered for their feasibility to meet the needs of both Trey and Delilah. This was done to enable the development of a single prototype that meets the basic needs for both cats and to help determine the specific characteristics unique to each Trey and Delilah. Physical prototype testing will be necessary to determine with certainty what features and designs are best suited to both Trey and Delilah.
System ArchitectureA top-down overview of how each component of the cat cart relates to the other components.
An overview of all of the potential places that design risk could occur. This ranges anywhere from technical issues such as too much weight in the design to safety issues such as sharp edges and a design that can make the cat get stuck in the environment.
Conceptual Constraints and Materials:
- Mass less than (0.5-1.0) kg
- Sturdy Materials
- Cost less than $100, less than $50 if possible
- Easy to Build, minimal tools needed
For analysis of a simple build, the following components will be utilized for each system:
- 2 Cat Leash Harnesses – Harness/Support
- 2 Aluminum Arrow Shafts (shaped/cut) – Frame
- 2 K’Nex Wheels and Tires – Wheels
Based on the calculations, the cost and total mass for the cart components remain well within an acceptable range, with plenty of overhead for connectors and other necessary components.
Arrows would only require a hand-saw, and assorted connectors may only require glue and a few screwdrivers or wrenches.
Product Concept Art
Current schedule for the next three weeks of design. This upcoming phase will involve physical prototype creation and development. Ideas that have been brainstormed during this phase will be rigorously tested to make sure they can meet the engineering requirements.
Individual contributions were created using the Three Week Plan. These documents are proprietary but a copy can be given if requested. Questions we answered were 1) what do I plan to do to ensure a successful Phase 2 Review 2) what did I actually do in Phase 2 3) what did I learn in Phase 2