Table of Contents
This page documents the process from the initial Problem Definition to a full Systems Level Design of building the multi-functional mechanized stage props
Functional DecompositionThe Functional Decomposition diagram shows the breakdown of functions that the Stage Props should perform. The functional decomposition is set up in a way that when read top to bottom answer the question "how?" at each subsequent level. When read bottom to top the functions answer the question "why?" at each increasing level.
Morphological ChartA morphological chart was made summarizing the different options for each of the functions in the Functional Decomposition graph.
Concept DevelopmentFrom the functional decomposition and morphological chart that derives the function of each aspect of each element, group members drafted and developed multiple concept ideas accessed via the link below Concept Ideas.
Concept SelectionFrom the list of drafted concept ideas, each idea was weighed against a criteria predefined from the engineering requirements. If the concept idea fulfilled the criteria then it scored a 1, if it did not then it scored a 0, if the concept countered the criteria then it was scored -1. Concept ideas were filtered through an initial and secondary screening based on the total score from the criteria testing. The final concept ideas were gathered from the final round of screening and are listed below.
- The wings are simple spring systems and reliable
- Weighted eyeballs and simple pulling the eyelids are both easy and reliable methods
- Rollers are attached to ensure that the panels move up or down one by one
- The bottom panel is connected with a string attached to a motor so that the door will open when the panels go up
- There will be one spring pulling back the panels so that the door will close when the panel go down
- Budget total of $1500
- Using a preliminary BOM can estimate the potential maximum, minimum, and average predicted cost of all of the parts we plan to buy
- Recent potential donor, Teknic, a company local to Rochester that builds various high quality servo motors has offered to donate motors to the project in exchange for their name being put on our Imagine RIT poster
- Save about $300-$600
- Once we can give specifications about the loads we need to move with the motors so they can donate the appropriate motors.
- Allows for us to focus our budget on developing other aspects of the stage that would have been otherwise neglected due to the budget constraints.
- Tablet consists of LCD display, plugged into Raspberry Pi 3
- Raspberry Pi 3: Small, cheap, and vast amounts of resources online for code and integration. Children are taught how to program using this device
- Radio operating in 900MHz range. Will not interfere with augmented reality. Will not interfere with other radio communications of stage crew
- Radio has a 1-2 mile range of operation; more reliable than using RIT wifi or bluetooth
- Battery pack can be used, but plugging tablet into outlet is most reliable power option
- Can start ASAP on assembly and programming of wireless system
- The MSP430 is cheaper than other controllers
- No need for external crystal since MSP430 can run at the full 16Mhz from it self
- No need for separate FTDI cable in order to communicate with the MSP430
- It’s easier to obtain and reliable. It also doesn’t require much power to turn it on by just a USB
Plans for next phase
Accomplishments from Previous Phase
Individual Plans for next phase
Design Review Materials
- Presentation Agenda can be found here
- Excel file for Confirmed Customer and Engineering Requirements here
- Excel file for Risk Management Matrix as of the end of this Phase here
- Excel file for Concept Screening Matrix here