Digital Control in Power Electronics Synthesis Lectures on Power Electronics
Electronics and Control System Design and Development
description
Transcript of Electronics and Control System Design and Development
Electronics and Control System Design and
DevelopmentSeth Bourn
with Ted Hench, Kevin McIntire, & Sonya Pursehouse
Long Term Objective
• Provide GPS Payload Tracking• Stabilize Payload After Separation
and During Turbulence• Direct Payload to Pre-Determined
Coordinate• Maintain Sensor Operation and
Scientific Data Handling
Current Status
• Provide GPS Payload Tracking• Maintain Sensor Operation and
Scientific Data Handling• Stabilize Payload After Separation
and During Turbulence
Control System Overview
• Option 1: Accelerometer– Use Accelerometer to measure the
acceleration of gravity– Accelerometer is mounted parallel to the
surface of the earth– As angle of payload changes,
accelerometer reading will equal:
A(t) = g sin(θ(t))
Accelerometer Issue
• The accelerometer works perfectly in the static case
• Due to how the sensor must be mounted, it can give a false positive
• Forward acceleration will read as a “nose up” pitch
• Since forward velocity and pitch are coupled, these readings can skewed results
Control System Overview
• Option 2: Gyroscope– Gyroscope measures the Rate of
Rotation experienced by the payload– Reading is not biased by inertial
translation– Challenges lie in programming and
computational overhead
Recent Issues
• Ongoing problem of sensor accuracy• Signal Noise• Microcontroller latency during servo
actuation
Solutions
• Zeroed Analog to Digital Converter– By providing a reference voltage, errors
were reduced from 10% to 0.1%
• Research into Secondary Controller for Servo Actuation– Possibility of using a 4017 Decade
Counter to handle pulsing output for Servos.
On the Horizon
• Development of AVR Microcontroller to replace current BASIC Stamp
• Addition of second BASIC Stamp to alleviate processing load and increase speed.
Thank You
Questions?