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Preliminary Detailed Design

Table of Contents

Preliminary Detailed Design

The Preliminary Detailed Design Phase is consisted of identifying and proving feasibility in the critical subsystems of our multi-functional mechanized stage props . The analyses and their results are shown below.

Goals, Accomplishments, Future Tasks

Phase 2 Recap

Project Scope was Changed

Change in Customer and Engineering Requirements

Changed CR's are highlighted in yellow

Changed CR's are highlighted in yellow

Changed ER's are highlighted in yellow

Changed ER's are highlighted in yellow

(REV 10-23-2018)

Finalized Concept Selection

Finalized Concept Selection based on chnaged Requirements

Finalized Concept Selection based on chnaged Requirements

Finalized System Design Functions

Gate Door

(Single Parting Fan Type Door Slide up)

The primary driving force will be tension via a single rope attachment to the door at the lowest position. Via locking mechanisms in the form of linkage bars, the doors will collapse upwards to a “open” position. When returning the pulley mechanism will release tension, allowing gravity to return the doors back to original position. The linkage bars will be the primary to prevent the doors from collapsing completely downwards but also additional hard stops will be added to make sure the door stops at a appropriate height.

Gate Door Movement

Gate Door Movement

Shrine Door

(Bus type door attached to rigid bar, powered by motors and gears)

The primary driving force will be torque via a gear system attached directly to a motor. Motor system will be at the top to prevent interference with the platform design. The doors will be on casters and attached to pins within a channel above the system, the pins will be moved by a rotating linkage bar attached to the gear system. All the weight will be on the casters, allowing for fluid motion and therefore effects due to friction are reduced.

Shrine Door Movement

Shrine Door Movement

Baby Eyes

(Solenoid driven eye movement with 3D printed eyes on a pivot)

There will be weighted eyes so that the eyes will remain closed in a sitting position. Solenoid located within the baby’s head will strike a tape connected to the eyes, causing the eyes to pivot around a axis. The solenoid can strike multiple times or hold for a few seconds allowing the baby to “blink.”

Eyes Movement

Eyes Movement

Platform

(Motor driven axel wheels Car type platform with added drawer function for support)

The primary driving force will be motors located within the platforms attached directly to the back wheels. The wheels will move forward as the motor spins causing the platform to move forward. Security measures via motor control will be tested for to make sure the platform stops. Hard stops in the form of guide rails will help support and prevent platforms from moving in undesired planes of directions.

Platform Movement (Sliding)

Platform Movement (Sliding)

Tablet

Tablet Concept Overview

Tablet Concept Overview

Design and Flowcharts

Gate Door

Open Gate Door Flowchart

Open Gate Door Flowchart

Close Gate Door Flowchart

Close Gate Door Flowchart

Shrine Door

Shrine Door Flowchart

Shrine Door Flowchart

Baby Eyes

Baby Eyes Open Flowchart

Baby Eyes Open Flowchart

Platform

Platform Flowchart

Platform Flowchart

Tablet

Controls Flow Chart

Controls Flow Chart

Critical Parameters (CP's)

Baby Eyes

  1. The distance that the string needs to move to open/close baby eyes
    • This can be achieved by changing the ratio of the arms on the to get desired distance due to the small displacement from the solenoid
  2. The position of the “eyeballs
    • This can be achieved by performing measurement of distance to several fixed points.

Gate Door

  1. The force needed to pull up the panels
    • This can be met by calculating the total weight of the panels, the angle of the string is W.R.T. the vertical plane, we can calculate the minimum force required from the motor, which will be shown as the power of the motor required
  2. The force needed from the spring to push the panels down
    • This can be met by measuring the displacement of the spring, then instead of showing the force, the desired spring constants will be demonstrated.

Shrine Door

  1. The force required for the bearings to support the weight of the door
    • This can be achieved by calculating the weight of the door, then assume evenly distribution, find the minimum force required on each bearing. Afterwards, find the appropriate materials with sufficient material properties (Young’s Modulus, Maximum Compression strength, etc.) that makes the bearings.
  2. The force required to pull the doors open/close
    • Based on the frictions and the weight of the door, calculate the force needed to open/close the door within desired time period. Therefore, this CP can be simply met by performing the math will give the power of the motor required

Platform

  1. The force required to push the platform rolling
    • Based on the weight of the platforms, friction coefficient, etc., we can calculate the torque required from the motor, which will be shown as the power of the motor eventually
  2. The weight that the platform can support
    • This parameter will be shown as the material properties. After the calculation of the weight that the platform needs to support, find appropriate structure of the platform, position of the casters, and the right materials needed (Young’s Modulus, Maximum Compression strength, etc.) to construct the platforms.

Tablet

  1. Tablet turns on and touch screen buttons function
  2. Tablet can send signals through Ethernet properly

Motor

  1. Received signals from the tablet and goes smoothly to the motors because of the clearpath
  2. Motors has 4 positions option and allowing to automatically stop in case of slight pre-arranged values for different movements aka when it hit something else it will stop directly.

Test Plans

Due to changes to requirements last minute, there was not significant enough time to plan out specific test plan details. Keeping in mind continual changes later on, the group decided that making sure during the prototyping phase to flesh out any potential issues and continually experiment to decrease the potential for function failure. Aside from that, the group plans to perform multiple completion tests to make sure the element performs correctly for a range of expected uses.

Baby

Gate Door

Shrine Door

Platform

Tablet

Motor

Bill of Material (BOM)

Purchasing BOM

Purchasing BOM (Part 1)

Purchasing BOM (Part 1)

Purchasing BOM (Part 2)

Purchasing BOM (Part 2)

Resourcing BOM

Resourcing BOM

Resourcing BOM

Risk Assessment

public/Detailed Design Documents/Risks from 1 to 19.PNG public/Detailed Design Documents/Risks from 20 to 39.PNG public/Detailed Design Documents/Risks from 40 to 54.PNG
Rate of Risks by end of Phase 3

Rate of Risks by end of Phase 3

Plans for next phase

Plans for Phase 4

Plans for Phase 4

Individual Plans for next phase

Sammi Chan

Alex Guercio

Kole Seeber

Salem Bamatraf

Victor Xu

Abdulmohsen Alakil (Moe)

Plans for next semester (MSD II)

Plans for MSD 2

Plans for MSD 2

Design Review Materials


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