zhang3.m

控制系统仿真中的频率特性的MATLAB源码

denc=sym2poly(n+d)
%绘制闭环bode图
    w=logspace(-1,2)
    [m1,p1]=bode(numc,denc,w)
    subplot('position',[0.44,0.65,0.48,0.2])
    amp=20*log10(m1)
    semilogx(w,amp)
title('闭环bode图')
    ylabel('幅值') 
    grid on
    subplot('position',[0.44,0.4,0.48,0.18])
    semilogx(w,p1)
    xlabel('频率')
    ylabel('相角')
    grid on
      %计算稳定裕量
    sys=tf(numc,denc)
    [Gm,Pm,Wcg,Wcp]=margin(sys)
    set(handles.edit4,'string',Gm)
  set(handles.edit5,'string',Pm)
  set(handles.edit6,'string',Wcg)
  set(handles.edit7,'string',Wcp)
    set(handles.text5,'visible','on')
    set(handles.text6,'visible','on')
    set(handles.text7,'visible','on')
    set(handles.text8,'visible','on')
    set(handles.edit7,'visible','on')
    set(handles.edit4,'visible','on')
    set(handles.edit5,'visible','on')
    set(handles.edit6,'visible','on')
    set(handles.pushbutton1,'visible','on')
    set(handles.pushbutton3,'visible','off')
    
% --- Executes on button press in radiobutton3.
function radiobutton3_Callback(hObject, eventdata, handles)
% hObject    handle to radiobutton3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of radiobutton3
%选择单选按钮
set(handles.radiobutton3,'value',1)
set(handles.radiobutton2,'value',0)
set(handles.radiobutton1,'value',0)
set(handles.radiobutton4,'value',0)
%获得输入值
  z=str2num(get(handles.edit1,'string'))
    p=str2num(get(handles.edit2,'string'))
      k=str2num(get(handles.edit3,'string'))
    sys=zpk(z,p,k)
    subplot('position',[0.42,0.22,0.5,0.55])
    %绘制nyquist曲线并标注
    nyquist(sys)
    grid on
     title('nyquist曲线')
    xlabel('实轴')
    ylabel('虚轴')
      set(handles.text5,'visible','off')
    set(handles.text6,'visible','off')
    set(handles.text7,'visible','off')
    set(handles.text8,'visible','off')
    set(handles.edit7,'visible','off')
    set(handles.edit4,'visible','off')
    set(handles.edit5,'visible','off')
    set(handles.edit6,'visible','off')
    set(handles.pushbutton3,'visible','on')
    set(handles.pushbutton1,'visible','off')
% --- Executes on button press in radiobutton4.
function radiobutton4_Callback(hObject, eventdata, handles)
% hObject    handle to radiobutton4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of radiobutton4
%选择单选按钮
set(handles.radiobutton4,'value',1)
set(handles.radiobutton2,'value',0)
set(handles.radiobutton3,'value',0)
set(handles.radiobutton1,'value',0)
%获得输入值
 z=str2num(get(handles.edit1,'string'))
    p=str2num(get(handles.edit2,'string'))
    k=str2num(get(handles.edit3,'string'))
    sys=zpk(z,p,k)
    subplot('position',[0.42,0.22,0.5,0.55])
     %绘制nichols曲线并标注
    nichols(sys)
    grid on
     title('nichols曲线')
   xlabel('开环相角 ')
   ylabel('开环增益')
      set(handles.text5,'visible','off')
    set(handles.text6,'visible','off')
    set(handles.text7,'visible','off')
    set(handles.text8,'visible','off')
    set(handles.edit7,'visible','off')
    set(handles.edit4,'visible','off')
    set(handles.edit5,'visible','off')
    set(handles.edit6,'visible','off')
 set(handles.pushbutton3,'visible','off')
 set(handles.pushbutton1,'visible','off')
% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

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% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

close


% --- Executes during object creation, after setting all properties.
function edit4_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc
    set(hObject,'BackgroundColor','white');
else
    set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end



function edit4_Callback(hObject, eventdata, handles)
% hObject    handle to edit4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit4 as text
%        str2double(get(hObject,'String')) returns contents of edit4 as a double


% --- Executes during object creation, after setting all properties.
function edit5_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc
    set(hObject,'BackgroundColor','white');
else
    set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end



function edit5_Callback(hObject, eventdata, handles)
% hObject    handle to edit5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit5 as text
%        str2double(get(hObject,'String')) returns contents of edit5 as a double


% --- Executes during object creation, after setting all properties.
function edit6_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit6 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc
    set(hObject,'BackgroundColor','white');
else
    set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end



function edit6_Callback(hObject, eventdata, handles)
% hObject    handle to edit6 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit6 as text
%        str2double(get(hObject,'String')) returns contents of edit6 as a double


% --- Executes during object creation, after setting all properties.
function edit7_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit7 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc
    set(hObject,'BackgroundColor','white');
else
    set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end



function edit7_Callback(hObject, eventdata, handles)
% hObject    handle to edit7 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit7 as text
%        str2double(get(hObject,'String')) returns contents of edit7 as a double


% --- Executes on button press in pushbutton3.
function pushbutton3_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


analysis2