%《MATLAB在電子信息課程中的應用》第八章8.1節程序q81
% LTI模型的建立、參數提取和變換
% 電子工業出版社出版  陳懷琛 吳大正 高西全合著 2001年10月

clear,home,echo on,
pause,s1=tf([3,4,5],[1,3,5,7,9])
pause,s2=tf([3,4,5],[1,3,5,7,9],0.1,'InputName','電流','OutputName','轉速')
pause,s3=tf([4,5],[1,5,7,9],'td',0.1, 'InputName','u','OutputName','y') 
pause,s3a=tf([4,5],[1,5,7,9],'inputdelay',0.1,'outputdelay',0.3) 
pause,s3b=tf([4,5],[1,5,7,9],0.1,'inputdelay',1,'outputdelay',3) 
pause,s4=filt([3,4,5],[1,3,5,7,9],0.1)
pause,s5=ss(s1)
z = { [], -0.5 };				% 外括號是花括號
p = { 0.3, [0.1+2i,0.1-2i] };	% 外括號是花括號
k = [ 2, 3 ]; 					% 外括號是方括號，說明是兩個數字陣列
pause,s6=zpk(z,p,k,-1)
pause,s7=zpk(z,p,k)
pause,get(s1)
pause,get(s5)
pause,s5.a
pause,set(s1,'num',[0,1,2,3,4],'den',[2,4,6,8,10])
pause,get(s1)
pause,s6.p{2}
pause,s6.p{2}=[0.5; 0.7]
pause,[f1,g1]=tfdata(s1)
pause,f1{1},g1{1}
pause,[z1,p1,k1,T1s]=zpkdata(s1)
pause,f1{1},g1{1}
pause,[ a2, b2, c2, d2, Ts2, Td2 ] = ssdata (s2 )
pause,s1=tf(2,[1,1],'Td',0.2)	% 建立一個帶時延Td=0.2的簡單系統
%s2=feedback(s1,1)		% 加一個單位負反饋
pause,[numd,dend] = pade(0.2,3) 
pause,spd1=pade(s1,3)
pause,s2=feedback(spd1,1)	
pause,sys=rss(4)
pause,sys=rss(4, 3, 2)
pause,[num,den] = rmodel(4)
pause,[a,b,c,d] = rmodel(4)
pause,[num,den]=ord2(10,0.5)
pause,[a,b,c,d]=ord2(10,0.5)