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ME301: Measurement & Experimentation Laboratory

Unit 9: Dynamic Measurements and Control   In this unit, you will implement what you learned in previous units to make dynamic measurements and use these measurements in order to control a piece of equipment.  In lieu of performing the actual exercise, you will write a detailed procedure and submit hypothetical data for two of the following topics.  The topics are intentionally open-ended so that you have the freedom to define the problem as your resources permit.  Each report should consist of the following elements.

9a.       Introduction: Explain the exercise in the broader context of mechanical engineering.
9b.       Purpose: Briefly explain the specific, limited objectives of the exercise.
9c.       Equipment:  Where possible, list commercially-available equipment, complete with all available specifications.
9d.       Procedure
9e.       Theory: Outline the physical basis for the measurements and the details of data analysis.
9f.        Hypothetical Data: Generate hypothetical data, complete with estimated errors.
9g.       Analysis of Data and Presentation of Results
9h.       Recommendations for Future Experimenters

Unit 9 Time Advisory
This unit should take you 27 hours to complete.

☐    Subunit 9.1: 9 hour

☐    Subunit 9.2: 9 hours

☐    Subunit 9.3: 9 hours

Unit9 Learning Outcomes
Upon successful completion of this unit, the student will be able to:

  • Present engineering data and other information in graphical and/or tabular format.
  • Use automated systems for data acquisition and analysis for engineering systems.
  • Use elementary concepts of physics to analyze engineering situations and data.
  • Summarize and present experimental design, implementation, and data in written format.
  • Use new technology and resources to design and perform experiments for engineering analysis.

  • Reading: Virginia Tech University’s “Laboratory Report Guidelines” and “Sample Report” Link: Virginia Tech University’s “Laboratory Report Guidelines” (HTML) and “Sample Report” (HTML)
     
    Instructions: Read both sections and model your reports after them.
     
    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • Reading: University of Toronto’s “Laboratory Report Handbook” Link: University of Toronto’s “Laboratory Report Handbook” (HTML or PDF)
     
    Instructions: Read both sections and model your reports after them.  To view as a PDF, click on the PDF link in the top right corner.
     
    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

9.1 Dynamic Strain Measurements   Instructions: Design an apparatus that can observe the oscillations that occur when a cantilevered beam is suddenly loaded with a weight.  You may use commercially available strain gauges.

9.2 Accelerometry   Instructions: Design an apparatus to measure the acceleration that occurs when a stationary object is suddenly hit by a moving object (e.g.  a mass swinging from a pendulum).

9.3 Temperature Control of a Light Bulb   Instructions:An incandescent light bulb dissipates most of its energy as heat.  By adjusting the duty cycle of the bulb (i.e. by turning it on and off to control the amount of heat dissipated), one can control the temperature of the surface of the bulb.  It is your task to choose an appropriate temperature sensor and design a feedback control algorithm to keep the surface temperature at a set point by adjusting the amount of time that the bulb is lit versus dark.