CLOSING THE LOOP

1. CLOSING THE LOOP Teaching Control System Theory and Design Through Experimentation Project Design Engineer Project Mentors Mark Kapsch Dr. Brian Hodgkin Mr. Steve Innes

2. Preliminaries • Purpose of Project • Overview of Control System Theory • Antenna Azimuth Model Construction • Parts and Labor • Scalability

3. Reason for Design • Experimental Model for Control Systems Design Course, ELE425 • Commonly Encountered Control System Design Problem • Experimentation and Analysis Enhances the Learning Experience 70m Deep Space Tracking Antenna GoldStone Complex, California Photo Courtesy of NASA JPL

4. Basic Control System Theory • Control Systems Use Feedback Loops to Manipulate the Circuit Output

5. Transfer Function for the Model Antenna Azimuth System

6. Building the Experimental Model

7. As Constructed _ +

8. Model Antenna Azimuth System assembled and ready for testing

9. Analog System Schematic Diagram Gain = RF/RG

10. T I M E L I N E

11. Initial Budgetary Allocation $1000 or less Part Costs Estimated $745.60 Actual $909.64 Overrun $164.04 Labor Costs 217.5 Hours X $16.00/Hour = $3480 Total $4353.86 Parts and Labor

12. Scalability of Design • Built-in Option for Digital Control System Implementation • Ability to add Sensors or Motors above the Rotating Pedestal • Modular Design • Allows alternate components to be easily implemented

13. Antenna System Phase 2 • Project has been selected by Gabe Garza for enhancement • Elevation system to be added • Modification scheduled for Fall 07 to Spring 08

14. Summary • Need for Project • Control System Theory • Development and Construction • Project Cost • Future Growth

15. Questions?

16. Backup

17. Block Diagram Reduction

18. Unknowns Mechanical System

19. The Mechanical System Problem

20. The Electrical System Problem