- Potentiometer Antenna 0 7 B000 Azimuth Desired Azimuth Angle Input Angle Output Differential Amplifier And Power Ampli 1 (71.37 KiB) Viewed 729 times
- Potentiometer Antenna 0 7 B000 Azimuth Desired Azimuth Angle Input Angle Output Differential Amplifier And Power Ampli 2 (60.45 KiB) Viewed 729 times
Potentiometer Antenna 0;(7) B000 Azimuth Desired azimuth angle input angle output Differential amplifier and power amplifier Motor Potentiometer The figure above shows the prototype control problem that we will use throughout the control section of the course. Here the goal is to design a system where the user determines the angle of a massive radio telescope antenna by turning a potentiometer. To describe this system: • Potentiometer on the left gets the user input and converts it to an electrical signal, Potentiometer on the right is used to measure the actual angle of the antenna (that we want to control) and convert it into an electrical signal, • Differential amplifier measures the difference between the user input angle and the actual angle of the antenna, which is the error, • This error signal is used to rotate a DC motor. We will concentrate on the how's and why's of this system in more detail. For the time being, our goal is to simulate this system in Simulink to enter into the real world of control engineering The figure below shows the transfer function-based block diagram of this antenna angle control system. You are asked to implement this system in Matlab's Simulink. Desired azimuth angle Potentiometer e(s) V (5) + Kpot Gears Power amplifier K E.) sta Preamplifier V (5 K V.(5) Motor and load K e(s) s(stam) Azimuth angle 8 () K
Desired azimuth angle Potentiometer 0/8) V/() + Kpot Gears Power amplifier JE (8) sta Motor and load le(s) Preamplifier V. (8) K Azimuth angle Ꮎ (s ) . V s(s+a 0-0000 Potentiometer Kpot In this block diagram: • Desired Angle is a unit step function in time with initial value and final value 1. • kpot = 0.319 • K1 = 100 • km = 2 . a = 100 • am = 2 Kg = 0.1 C Instructions: • Place scope at the input to monitor the input. • Place a scope at the output of the system. • Connect the antenna visualization block diagram provided (Make sure that antenna.m and antenna-s-function.m provided should be in your working directory) • Monitor the time response between simulation times 0 and 15 for a. K20 b. K=110 • Prepare a project report pdf file which includes the Simulink block diagram picture and all the time response plots. Please label and explain the behavior of your time responses • Include your output plots for both cases and comment on the time behavior of the output. Try to find your best K value to minimize overshoot and obtain fast response. Report your K value and the corresponding overshoot value. Include the corresponding time response plot. • Name your Simulink file as lastname.slx). • Submit the project report pdf file and Simulink file separately