work in progress solution for exercise 1 of coursework

1 files changed, 50 insertions, 0 deletions

diff --git a/coursework17/ralston_script.m b/coursework17/ralston_script.m
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+++ b/coursework17/ralston_script.m
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+% Vin = aI' + bI
+
+R = 0.5;    % 0.5Ohm
+L = 0.0015; % 1.5mH
+data_points = 10000;
+
+% Go on for 8 time constants
+time_constant = L/R;
+step = time_constant*8/data_points;
+
+% Signal 1 Vin = 5.5V
+Vin = @(t) 5.5 + 0*t;  % 5.5V
+current_initial=0;
+
+[t, Vout] = ralston(R, L, Vin, current_initial, step, data_points*step);
+plot(t, Vout);
+
+% Signal 2a Vin = 5.5*exp(-t^2/r) V
+Vin = @(t) 5.5*exp(-(t*160*10^(-6))^2)  % 5.5V
+current_initial=0;
+
+[t, Vout] = ralston(R, L, Vin, current_initial, step, data_points*step);
+plot(t, Vout);
+
+% Signal 2b Vin = 5.5*exp(-t/r)
+Vin = @(t) 5.5*exp(-t*160*10^(-6))  % 5.5V
+current_initial=0;
+
+[t, Vout] = ralston(R, L, Vin, current_initial, step, data_points*step);
+plot(t, Vout);
+
+% Signal 3
+T(1) =  20e-6;  % 20us
+T(2) =  450e-6; % 450us
+T(3) =  1000e-6;% 1000us
+
+for j=1:3
+	f = 1/T(j);
+	Vin = @(t) sin(2*pi*f*t);
+	[t, Vout] = ralston(R, L, Vin, current_initial, step, data_points*step);
+	plot(t, Vout);
+
+	Vin = @(t) sawtooth(2*pi*f*t);
+	[t, Vout] = ralston(R, L, Vin, current_initial, step, data_points*step);
+	plot(t, Vout);
+
+	Vin = @(t) square(2*pi*f*t);
+	[t, Vout] = ralston(R, L, Vin, current_initial, step, data_points*step);
+	plot(t, Vout);
+end