ACTIVE SUSPENSION TEST PLATFORM - PowerPoint PPT Presentation

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ACTIVE SUSPENSION TEST PLATFORM

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Title: ACTIVE SUSPENSION TEST PLATFORM


1
ACTIVE SUSPENSION TEST PLATFORM
BY
  • BRANDON NAYDEN
  • CHIAO LIU

ADVISED BY STEVEN GUTSCHLAG
2
TABLE OF CONTENTS
  • PROJECT SUMMARY
  • FUNCTIONAL DESCRIPTION
  • SPECIFICATIONS
  • BLOCK DIAGRAMS
  • INPUTS/OUTPUTS
  • EQUIPMENT/PARTS LIST
  • DIVISION OF LABOR
  • DISCUSSION OF HARDWARE/SOFTWARE
  • COMPLETED WORK
  • QUESTIONS

3
PROJECT SUMMARY
  • To simulate a suspension system for testing
    purposes.
  • Actuator driven platform.
  • Simulation for vehicular applications.

4
FUNCTIONAL DESCRIPTION
  • A micro-controller controlled H-bridge will
    dictate the movement of the actuator platform
  • Movement will be in a vertical fashion
  • User input will specify desired duty cycle,
    direction, and waveform
  • Digital control feedback
  • Liquid crystal display will indicate current user
    desired output

5
SPECIFICATIONS
  • Platform velocity of 7 inches/second
  • Platform load capacity of 200 pounds
  • User-friendly interface
  • Safe environment

6
FINAL PLATFORM CONFIGURATION
7
LOW LEVEL SYSTEM BLOCK DIAGRAM
8
INPUTS/OUTPUTS
  • INPUTS
  • Direction
  • Duty Cycle
  • Waveform
  • Displacement
  • Position Sensor
  • OUTPUTS
  • Platform Movement
  • Current user input on liquid crystal display

9
EQUIPMENT LIST(HARDWARE)
  • DC SERVO MOTORS
  • IR2213 HIGH LOW DRIVERS
  • IRF640 TRANSISTORS
  • IRF350 TRANSISTORS
  • 4N25 OPTICAL ISOLATORS
  • LINEAR ACTUATOR
  • MICRO-CONTROLLER
  • RHEOSTAT

10
EQUIPMENT LIST (ACTUATOR)
  • Jack ball screw
  • 400
  • 7inches/sec _at_200lbs
  • Motor and coupling needed

11
DIVISION OF LABOR
  • Chiao Liu
  • Micro-controller to hardware interface
  • Protection circuitry
  • H-bridge connections
  • Hardware and Software debugging
  • Brandon Nayden
  • H-bridge drive circuitry
  • All Software modules
  • Hardware and software debugging

12
DISCUSSION OF HARDWARE
  • 4N25
  • OPTICAL
  • ISOLATORS
  • PROTECTION PURPOSE
  • VOLTAGE DRIVE FOR IR2213

13
DISCUSSION OF HARDWARE
  • IR 2213 HIGH LOW DRIVER
  • Drive for H-bridge transistors

14
IR2213 Combined with H-bridge
  • Each IR2213 drives the high and low side of
    H-Bridge

15
H-Bridge and Motor Direction
  • H Bridge driven by IR2213

Forward direction of motor
16
H-Bridge and Motor Direction
H Bridge driven by IR2213
Reverse direction of motor
17
IR2213 Typical Connection
18
IR2213 Bootstrap Circuit
Cbs 10uF Cdc .1uF
19
IR2213 Inputs
Vdd 18v Vss ground H(in) L(in) 0 to 18v
Vcc 18v SD(shutdown)ground Vs to load COM
ground
20
IR2213 Outputs
LO 0 to 18v HO 0 to 18v above H-bridge supply
21
HARDWARE TESTING
IR2213 switching H-Bridge
22
HARDWARE TESTING
IR2213 switching H-Bridge
23
HARDWARE CONFIGURATION
24
DISCUSSION OF HARDWAREPower CalculationsIRF640
120V motor
  • 4 amp motor rated current 2.4 W
  • Without heat sink
  • Delta T 149 degrees C
  • With heat sink
  • Delta T 53 degrees C

25
SOFTWARE DISCUSSION
  • 14 Modules
  • Timer 2 Mode 0
  • External interrupts for port 4 output
  • Liquid crystal display and keypad implementation
  • Feedback input from actuator
  • Digital control system

26
COMPLETED WORK
  • Searched for appropriate linear actuator and
    platform configuration
  • Searched for appropriate motor and motor drive
  • All hardware design and implementation
  • Initial software design and implementation

27
COMPLETED WORK
  • Bi-directional actuator movement
  • User interface for actuator control
  • Display of current direction and duty cycle

28
COMPLETED WORK
  • Forward and reverse direction
  • Various duty cycles
  • Position feedback allows actuator to change
    direction without user input

29
TASKS NOT COMPLETED
  • Hardware implementation with 120 volt DC motor
  • Build Test Platform with appropriate linear
    actuator
  • Digital control software implementation
  • - Ensures proper output at various loads

30
QUESTIONS
  • ?
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