Pan Tilt Antenna Controller Midterm Progress Report Group Number E8 Project Sponsor: Calit2 Course Advisor: Jan Kleissl Project Advisors: Daniel … Team Members: Miguel … Cory

Pan Tilt Antenna Controller Project Definition and Objectives Background: Students have designed the Pan Tilt Antenna Controller to remotely rotate and tilt a directional antenna that will be mounted atop a 35 foot antenna mast. Currently, control of the device is limited to basic on/off commands using a simple servo controller and GUI. Objectives: Employ GPS input with extremum seeking to create a more adaptable controller for the fine tuning of signal strength or accommodation for the movement of signal sources.

Theoretical Methods Initial Model Testing and Tuning: A continuous-time simulation using Simulink. Two-Dimensional Expansion: Allow for the pan and tilt motions. Discretization: Transform to discrete-time with Z-transforms. Control Algorithm: Difference equations from the discrete system

Experimental Methods Implementation of Control Algorithm: Compile C program Input/Output Processing: Configure serial inputs and PWM outputs. Initial Position Algorithm: Integrate GPS points of 2 antennas. Prototype Circuit Board: Microcontroller chip, I/O connections, power circuitry. Preliminary Functionality Testing: Constant circular motion of antenna controller via a simplified algorithm. Extremum Seeking Control. System Tuning Experimentation: Expose controller to various situations.

Project Task Descriptions Research Simulink Modeling C Programming Implementing Testing Tuning Evaluation

Pan Tilt Antenna Controller Team Assignments and Organization Research: Microcontrollers – Scott Signal Properties – Miguel Extremum Seeking – Andy Component Integration – Cory Programming: PWM Output – Miguel Signal Strength – Cory Compass Input – Scott Implementation: Circuitry – Cory, Miguel Testing and Tuning – Team Effort

Pan Tilt Antenna Controller Work Schedule Week 1 – Adaptive Control Research Week 2 – Continuous-Time Modeling Week 3 – Discrete-Time Modeling Week 4 – Algorithm Construction Week 5 – Input/Output Programming Week 6 – Initial Position Programming Week 7 – Functionality Testing Week 8 – Extremum Seeking Programming Week 9 – Tuning Week 10 - Evaluation

Pan Tilt Antenna Controller Progress to Date Research: Extremum Seeking Control Optimization Antenna Network Configuration Microcontroller Functionality I/O Protocol System Model: Simulink Continuous Model Simulink Discrete Model C Language Algorithm Implementation: Microcontroller Chosen I/O Protocol Acquired