Road Vibration Simulator EGR 448: Senior Design Carolyn Bassetti - PowerPoint PPT Presentation

Road Vibration Simulator EGR 448: Senior Design Carolyn Bassetti Sarah Brady Mandy Frederick Jessica Irons Matt Windon http://www.technokit.it/prodotto/tkt99%20J%20ing.htm

The Big Plan

Problem Definition • Project Objective: To design and implement a versatile device and corresponding classroom experiments for use in the Miami University Vibrations Laboratory to simulate road vibrations felt by vehicles during normal operation.

Team Objective • Hands on Education • Intuitive Experiments • Supplement Vibrations Course – Enhance Educational Experience • Mobile, Independent Equipment

Final Design of Experiment OUTPUTS CAR INPUTS COMPUTER

Past/Present/Future Hardware • PAST – Identified Necessary Components • Structure (Car) • Input Force (Shaker) • Measurement Devices (Load Cell, Accelerometers) – Selected Type of Components • Entire Car vs. Scaled Model vs. Car Components • Impact Hammer vs. Shaker • PRESENT – Researched Prices/ Features of Actual Components (Car, Shaker) – Selected Final Components To Purchase (Car, Shaker) – Purchased Components (Car, Shaker) • FUTURE – Research, Selection, Purchasing of Components (Load Cell) – Test Components (Car, Shaker, Load Cell)

Past/Present/Future Software • PAST – Identified Necessary Capabilities of Software • Data Acquisition and Analysis – Selected Type of Software • Matlab vs. LabView • PRESENT – Created Simulink model and Matlab program • Used to look at the differences in hammer vs. shaker data – Created overall GUI design – Created mini models of working GUI components – Wrote Matlab Code for Data Acquisition • FUTURE – Create entire working GUI – Continue writing code for data acquisition – Write code for data analysis

Past/Present/Future Experiments • PAST – Conducted background research on the importance of vibration in design • PRESENT – Researched vibrations experiments currently in use – Developed basic ideas for 2-3 experiments – Began documenting background information to go along with the experiments • FUTURE – Develop experiments – Document experimental procedures – Document experimental questions – Conduct user tests – Suggest relevant changes in experiments/ documentation

Flow Chart

Car • Scale – 1/10 th • Limited placement of accelerometers & actuator • Accelerometers add substantial percentage of weight • Data at consistently high range – Full Size Parts • Data at consistently low range – 1/5 th • Data in most feasible range to analyze • 1/5 th more similar to real car in terms of weight, engine, tires & response • Whole Car vs. Chassis & Suspension System • Less expensive • Less intuitive

Car Selection Matrix Selection Matrix (based on a scale of 1 – 5) Metal Intuitiveness Functionality Construction Suspension Cost Total: Alro Racing- whole car 4 4 4 4 3 19 GB Direct- parts only 3 3 3 3 3 15 Victory Speedway- parts only 3 3 4 4 3 17 Build our own-H frame and suspension 2 2 4 3 4 15

TKT99 Junior Car Specifications: Length: 35” Width: 14.5” Height:10.5” Weight: 21lbs http://www.technokit.it/prodotto/tkt99%20J%20ing.htm

Support Structure

Input & Output • Input – Shaker – Amplifier – Cooling System • Output – Load Cell (output from shaker to car) – Accelerometer (output from car) http://www.mbdynamics.com/modal.htm

Simulink Experiments • Shows the difference between random input (shaker) and impulse input (hammer)

Software: DAQ Toolbox • DAQ (Data Acquisition) Toolbox – Within Matlab Accelerometers: Signal Converting DAQ MATLAB Code Analog Conditioning Card in Toolbox: To Analyze Data Box: Analog Computer: Digital (GUI is used to Analog � initialize this): Digital Digital

Software: GUIDE • GUIDE (Graphical User Interface Development Environment) – Within Matlab http://www.mathworks.com

GUI (Graphical User Interface) • Examples – Pull-down menu – Graph • Ergonomic Principles for Design – Simplicity – Consistency – Immediate Feedback – Intuition

Classroom Experiments • Key Objective: Intuitive Learning • Lab 1- Introduction to Equipment & Transfer Functions • Lab 2- Analysis of Shaker Location – Full Size Car Comparison • Possible Lab 3- Data Collection and Analysis Issues

Supporting Issues • Safety – Lab Manual BOM - $ Car 530 • Environmental Shaker 3900 – Self-contained System Amplifier 3266 Cooling System 341 – Cooling System Accessories Kit 707 Load Cell not purchased • Cost Support Structure not purchased Total: $8,744.00

Timeline ID Task Name Start Finish September October November December January February March April 1 Tue 9/9/03 Tue 9/9/03 Design Teams Assigned 2 Sat 9/20/03 Sat 9/20/03 Visit UC Vibrations Laboratory 3 Fri 9/26/03 Fri 9/26/03 Vibrations in a Nutshell Presentation 4 Fri 9/26/03 Fri 9/26/03 Proposal to Dr. Ettouney 5 Preliminary Presentation Thu 10/9/03 Thu 10/9/03 6 Preliminary Report Fri 10/3/03 Mon 10/13/03 7 Research Tue 9/9/03 Fri 10/31/03 8 Previous Designs Tue 9/9/03 Fri 10/31/03 9 Alternatives to hydraulics Tue 9/9/03 Fri 10/31/03 10 Prices of shakers and other components Tue 9/9/03 Fri 10/31/03 11 Model Cars Tue 9/9/03 Fri 10/31/03 12 Design Selection Wed 10/22/03 Fri 11/14/03 13 Purchase Components Mon 11/17/03 Fri 1/23/04 14 Test Components Mon 1/26/04 Fri 3/26/04 15 Assembly of Apparatus Mon 3/29/04 Fri 4/16/04 16 Develop/Integrate Data Collection/Analysis So Mon 11/3/03 Fri 4/16/04 17 Test Software and Experimental Testing Tech Mon 3/29/04 Fri 4/23/04 18 Writing of Final Report Mon 11/3/03 Fri 4/30/04 19 Write Lab Manual Mon 11/17/03 Fri 4/16/04 20 Fri 4/16/04 Thu 4/22/04 Run User Test on Current EGR 315 Students 21 Fri 4/23/04 Tue 4/27/04 Post Information to the Internet 22 Mon 4/19/04 Wed 4/21/04 Make Design Information Available to Others

EGR 449 Deliverables Task Name Duration [Day] Start Date Finish Date Test Components 45 days Mon 1/26 Fri 3/26 Assembly of Apparatus 15 days Mon 3/29 Fri 4/16 Develop Data Collection/Analysis 120 days Mon 11/3 Fri 4/16 Software Writing of Final Report 130 days Mon 11/3 Fri 4/30 Write Lab Manual 110 days Mon 11/17 Fri 4/16 Run User Test on EGR 315 Students 5 days Fri 4/16 Thu 4/22 Post Information to the Internet 3 days Mon 4/19 Wed 4/21

Acknowledgments • MB Dynamics • ALRO Racing • Dr. Khan • Dr. Shukla

Questions ?? http://www.technokit.it/prodotto/tkt99%20J%20ing.htm