1. Craig Chan & Mike Abidoye
Active Suspension System Test Platform Bradley University Department of Electrical & Computer Engineering
By:
Craig Chan & Mike Abidoye
Advisor:
Steven Gutschlag
2 December 2004

2. Outline Project summary Previous work Functional description
Block diagrams
Inputs and Outputs
Subsystems
Software flowchart
Hardware configuration
Parts list
Work Schedule
Questions?

3. Project Summary
Drive a platform load with a linear actuator or a DC motor
Microcontroller based feedback control system
User selects frequency, amplitude, and waveform type
Optional analog input

4. Previous Work Linear Actuator Power electronics calculations
Plant model
System responds with different waveform types
Bidirectional movement of platform loads

5. Functional Description
Responds to a platform load via feedback system
The mode of operation will be determined by the user via a keypad on the micro-controller.
Sinusoidal
Step
Triangular
Flexibility in selecting desired frequency and amplitude of the platform’s motion

6. Control Block Diagram + -
Input Voltage Signal Representing the Desired
Platform Motion + -
Actuator
(Plant)
Platform
Motion
Controller
(EMAC Micropac 535)

7. Inputs & Outputs

8. System Block Diagram EMAC Micropac 535 Micro-Controller Interface A/D
Keypad Input
(Desired Platform Motion)
Analog Position Input (Optional)
EMAC Micropac 535
Micro-Controller
Interface
A/D
Converter
Power
Electronics
Test
Platform
FEEDBACK
Output
(Platform
Motion)
Display
(Desired user input)

9. Software Subsystem

10. Hardware Subsystem

11. Test Platform Subsystem

12. Software Flow Chart
Initialize keypad, LCD module, timers to be utilized, and other interfaces
START
Branch to main program, accept all user inputs from the keypad
Process all user inputs to obtain output for the platform, display user inputs and mode of operation on LCD
Fetch position feedback signal from the platform to update output control signals sent to the platform.
Loop back to main program.
END

13. Hardware Configuration

14. High & Low Side Driver Configuration IR2213

15. Transistor Power Calculation without heat sink
θJA = (TJ–TA)/Pd
2.4Watts

16. Parts List Micro Pac 535 High and Low Side Driver (IR2213)
Phototransistor (4N25)
Actuator
DC Motor
N-channel Power Mosfets (IR640)

17. Work Schedule Fall Semester ASSTP Project Research
Power Electronics Design
Spring Semester
Week 1-2 Software Design
Week 3-4 Software Coding and Platform Construction
Week 5-7 Software Debugging and Testing
Week 8-10 System Integration of Hardware and Software Subsystems
Week Research on project expansion and senior presentation preparation

18. QUESTIONS
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