initial commit / add all books

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diff --git a/29/CH8/EX8.6.2/exa8_6_2.sce b/29/CH8/EX8.6.2/exa8_6_2.sce
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+//caption:design_phase_lead_compensator

+//example 8.6.2

+//page 340

+clc;

+s=%s;

+clf();

+syms K;

+g=(K/(s^2*(1+0.05*s)));

+Ka=limit(s^2*g,s,0);//static acceleration error coefficient

+//since Ka=100

+K=100;

+g=(100/(s^2*(1+0.05*s)));

+G=syslin('c',g)

+fmin=0.01; 

+fmax=100; 

+bode(G, fmin, fmax) 

+show_margins(G)

+xtitle("uncompensated system")

+[gm,freqGM]=g_margin(G);

+[pm,freqPM]=p_margin(G);

+disp(gm,"gain_margin=");

+disp((freqGM*2*%pi),"gain_margin_freq=");

+disp(pm,"phase_margin=");

+disp((freqPM*2*%pi),"phase_margin_freq_or_gain_cross_over_frequency=");

+disp("since P.M is negaative so system is unstable ")

+disp("selecting zero of lead compensating network at w=5rad/sec and pole at w=54rad/sec and applying gain to account attenuatin factor .")

+gc=(1+0.2*s)/(1+0.0186*s)

+Gc=syslin('c',gc)

+disp(Gc,"transfer function of lead compensator=");

+G1=G*Gc

+disp(G1,"overall transfer function=");

+fmin=0.01; 

+fmax=100; 

+figure();

+bode(G1, fmin, fmax) 

+show_margins(G1)

+xtitle("compensated system")

+[gm,freqGM]=g_margin(G1);

+[pm,freqPM]=p_margin(G1);

+disp(pm,"phase_margin_of_compensated_system=");

+disp((freqPM*2*%pi),"gain_cross_over_frequency=");
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diff --git a/29/CH8/EX8.6.2/exa8_6_2_compensated.jpg b/29/CH8/EX8.6.2/exa8_6_2_compensated.jpg
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diff --git a/29/CH8/EX8.6.2/exa8_6_2_uncompensated.jpg b/29/CH8/EX8.6.2/exa8_6_2_uncompensated.jpg
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index 000000000..d22203e90
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+++ b/29/CH8/EX8.6.2/exa8_6_2_uncompensated.jpg