Hello,
I try to make an small APP derived from FUNCTION APP to plot Bode module and phase or temporal impulse response... It need a lot of improvements but it do the job very basically.
Place your transfert function (in term of X) in symb view then press plot. Choose "module" or "phase" or "temporal"... You need to fix setup plot to fit the curve manually... My best wishes is to find some help to improve the phase function to automatically plot it in the -inf ; +inf domain (without the -pi ; +pi discontinuity)
Be careful ! there are pieces of french in the soup...
Code:
copie_les_fonctions();
replace_les_fonctions();
place_les_modules();
place_les_phases();
place_les_rep_temp();
calcule_modules();
calcule_phases();
calcule_rep_temp();
Symb();
export liste_fonctions:={};
export liste_modules:={};
export liste_phases:={};
export liste_rep_temp:={};
recalcule:={0,0,0};
export copie_les_fonctions()
begin
local k;
for k from 1 to 10 do
if ISCHECK(k MOD 10) then
IFERR liste_fonctions(k):=EXPR("F"+k MOD 10) then end;
end;
end;
end;
export replace_les_fonctions()
begin
local k;
for k from 1 to length(liste_fonctions) do
if ISCHECK(k MOD 10) then
expr("F"+k MOD 10+":=liste_fonctions("+k+")");
end;
end;
end;
export place_les_modules()
begin
local k;
for k from 1 to length(liste_modules) do
if ISCHECK(k MOD 10) then
expr("F"+k MOD 10+":=liste_modules("+k+")");
end;
end;
end;
export place_les_phases()
begin
local k;
for k from 1 to length(liste_phases) do
if ISCHECK(k MOD 10) then
expr("F"+k MOD 10+":=liste_phases("+k+")");
end;
end;
end;
export place_les_rep_temp()
begin
local k;
for k from 1 to length(liste_rep_temp) do
if ISCHECK(k MOD 10) then
expr("F"+k MOD 10+":=liste_rep_temp("+k+")");
end;
end;
end;
export calcule_modules()
begin
local k;
for k from 1 to length(liste_fonctions) do
if ISCHECK(k MOD 10) then
liste_modules(k):=20*LOG(ABS(subst(liste_fonctions(k),'X','i*ALOG(X)')));
end;
end;
recalcule(1):=0;
end;
export calcule_phases()
begin
local k;
for k from 1 to length(liste_fonctions) do
if ISCHECK(k MOD 10) then
liste_phases(k):=ARG(subst(liste_fonctions(k),'X','i*ALOG(X)'));
end;
end;
recalcule(2):=0;
end;
export calcule_rep_temp()
begin
local f, k;
for k from 1 to length(liste_fonctions) do
if ISCHECK(k MOD 10) then
f:="F"+k MOD 10+"(x),x,x";
f:="'("+REPLACE(STRING(CAS.ilaplace(f)),"x","X")+")*PIECEWISE(X<0,0,X≥0,1)'";
IF instring(f,"ilaplace")
THEN MSGBOX("Problème avec F"+k MOD 10); KILL;
ELSE liste_rep_temp(k):=EXPR(f);
END;
end;
end;
recalcule(3):=0;
end;
Symb()
begin
recalcule:={1,1,1};
replace_les_fonctions;
STARTVIEW(0,1);
end;
Plot()
begin
local choix:=1;
if ΠLIST(recalcule) then copie_les_fonctions;
end;
CHOOSE(choix,"Choisissez un type de tracé",{"Module","phase","réponse temporelle"});
CASE
IF choix==1 THEN if recalcule(1) then calcule_modules end; place_les_modules END;
IF choix==2 THEN if recalcule(2) then calcule_phases end; place_les_phases END;
IF choix==3 THEN if recalcule(3) then calcule_rep_temp end; place_les_rep_temp END;
//DEFAULT
END;
STARTVIEW(1,1);
end;