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Good Vibrations Conceptual Design Review. University of Wyoming  James Richey, Justin Thornton, Luke Voss,         Jake Thatcher, Tony Allais Oct 27, 2008. Mission Overview

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good vibrations conceptual design review

Good VibrationsConceptual Design Review

University of Wyoming

 James Richey, Justin Thornton, Luke Voss,        

Jake Thatcher, Tony Allais

Oct 27, 2008

Mission Overview
  • Suppose a RockSat Payload Design group wanted to accurately and precisely measure time intervals for its experiment. Are there cheap and reliable crystal or electric oscillators that can get the job done?
  • Are crystal or electric oscillators stable during the acceleration period of the rocket flight ? What about during the free fall period after apogee where the payload experiences microgravity?
  • We are going to share data with the other UW group. We will use their data to analyze our results and look at different parts of the flight to see how it affected our oscillators.
Main Objective
  • To explore the effects of the rocket flight on crystal and electric oscillators.
    • Vibration
    • Electric/Magnetic Fields
    • No effects
  • Isolate the oscillators such that each experiences only vibration or electric/magnetic field effects, and there will also be a control oscillator with minimized effects and an oscillator affected by both vibration and electric/magnetic fields.
  • By recording data on oscillator’s outputs under varying conditions during the rocket flight, the effects of vibrations and electric/magnetic fields will be isolated and analyzed.
  • With the experiment complete and data analyzed it should be understood whether the oscillators used are accurate under the following conditions:
    • With and without vibration damping
    • With and without EM shielding.
Other Research
  • The effects of temperature on oscillators is well known. Every oscillator has its specifications listed and its sensitivity to temperature is one of them. It is usually given in ±ppm (pulses per minute).
  • The effects of acceleration on oscillators is also well known. However, this is not a commonly listed specification. Most oscillators are made to handle common vibration levels of 10-2g to 10-3g.
Success Criteria
  • Successful rocket retrieval
  • Successful data collection from oscillators
  • Future RockSat Payload Design Teams will have an idea whether the low cost oscillators used in our experiment are accurate enough for their time keeping needs. Alone, if the oscillators are not accurate enough, then vibration damping or EM shielding should be applied, as should be demonstrated in our experiment.
required hardware
Required Hardware
  • Micro Processor (1)
    • Mini-Dragon S12
  • Crystal Oscillators (4)
    • ACH
  • Electronic Oscillators (4)
    • CMX-309
  • Data Storage
    • SD card
functional block diagrams
Functional Block Diagrams
  • Basic Electric Component Diagram
RockSat Payload Canister User Guide Compliance
  • Mass, Volume
    • Expect to use 2.75 of 4 lbs.
  • Payload activation
    • We will use the G-switch.
    • The circuit will not be powered until the G-switch is activated upon rocket launch.
  • Rocket Interface
    • Shorting wires will be available outside of the can.
Shared Can Logistics Plan
  • University of Minnesota
    • Characterize the flight of the rocket and attempt to record data using techniques untested in suborbital flight.
  • University of Wyoming
    • Team 1 - Accurately measure various flight parameters.
    • Team 2 - To explore the effects of the rocket flight on crystal and electric oscillators.
  • Plan for collaboration on interfacing
    • For the UW projects, there are no location constraints, since we do not need a port. UW projects will not be connected to each other, however the data obtained from team one will be used to analyze team 2’s data.
  • Structural interfacing
    • Each team will design their circuit boards to connect to the five support columns.
    • The bulk heads will screw into the five support columns.
  • Organizational Chart
  • Schedule
    • See attached Schedule
  • Mass/Monetary Budget
    • Mass
      • Expect to use 2.75 of 4 lbs.
    • Monetary
      • Budget of approximately $500
      • Expect to spend $350
  • Issues and concerns
    • It is a concern of whether or not we can effectively isolate each of the oscillators to experience only vibration or EM effects.
  • Closing remarks
    • Good Vibrations hopes to gain valuable knowledge in the area of rocket science. Since every microprocessor has an oscillator, our project will help future groups understand the effects of rocket flight on their microprocessor.