zhang2.m

控制系统仿真中的频率特性的MATLAB源码

function varargout = zhang2(varargin)
% ZHANG2 M-file for zhang2.fig
%      ZHANG2, by itself, creates a new ZHANG2 or raises the existing
%      singleton*.
%
%      H = ZHANG2 returns the handle to a new ZHANG2 or the handle to
%      the existing singleton*.
%
%      ZHANG2('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in ZHANG2.M with the given input arguments.
%
%      ZHANG2('Property','Value',...) creates a new ZHANG2 or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before zhang2_OpeningFunction gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to zhang2_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help zhang2

% Last Modified by GUIDE v2.5 12-Jun-2005 19:01:01

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @zhang2_OpeningFcn, ...
                   'gui_OutputFcn',  @zhang2_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin & isstr(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT


% --- Executes just before zhang2 is made visible.
function zhang2_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to zhang2 (see VARARGIN)

% Choose default command line output for zhang2
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes zhang2 wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = zhang2_OutputFcn(hObject, eventdata, handles)
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
%设置当前窗口名
str='状态空间模型'
set(gcf,'name',str,'numbertitle','off')
% Get default command line output from handles structure
varargout{1} = handles.output;


% --- Executes during object creation, after setting all properties.
function edit1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit1 (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 edit1_Callback(hObject, eventdata, handles)
% hObject    handle to edit1 (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 edit1 as text
%        str2double(get(hObject,'String')) returns contents of edit1 as a double


% --- Executes during object creation, after setting all properties.
function edit2_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit2 (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 edit2_Callback(hObject, eventdata, handles)
% hObject    handle to edit2 (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 edit2 as text
%        str2double(get(hObject,'String')) returns contents of edit2 as a double


% --- Executes during object creation, after setting all properties.
function edit3_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit3 (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 edit3_Callback(hObject, eventdata, handles)
% hObject    handle to edit3 (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 edit3 as text
%        str2double(get(hObject,'String')) returns contents of edit3 as a double


% --- 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 on button press in radiobutton1.
function radiobutton1_Callback(hObject, eventdata, handles)
% hObject    handle to radiobutton1 (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 radiobutton1
%选择单选按钮
set(handles.radiobutton1,'value',1)
set(handles.radiobutton2,'value',0)
set(handles.radiobutton3,'value',0)
set(handles.radiobutton4,'value',0)
%获得输入数值
    A=str2num(get(handles.edit1,'string'))
    B=str2num(get(handles.edit2,'string'))
    C=str2num(get(handles.edit3,'string'))
    D=str2num(get(handles.edit4,'string'))
    sys=ss(A,B,C,D)
    [num,den]=ss2tf(A,B,C,D)
    %绘制bode图
        w=logspace(-1,2)
    [m1,p1]=bode(num,den,w)
    subplot('position',[0.44,0.7,0.48,0.2])
    semilogx(w,20*log10(m1))
    title('开环bode图')
    ylabel('幅值') 
    grid on
    subplot('position',[0.44,0.42,0.48,0.2])
    semilogx(w,p1)
    xlabel('频率')
    ylabel('相角')
    grid on

  %计算频域特性指标并显示
     [Gm,Pm,Wcg,Wcp]=margin(sys)
  set(handles.edit5,'string',Gm)
  set(handles.edit6,'string',Pm)
  set(handles.edit7,'string',Wcg)
  set(handles.edit8,'string',Wcp)
  set(handles.edit5,'visible','on')
  set(handles.edit6,'visible','on')
  set(handles.edit7,'visible','on')
  set(handles.edit8,'visible','on')
  set(handles.text9,'visible','on')
  set(handles.text10,'visible','on')
  set(handles.text11,'visible','on')
  set(handles.text12,'visible','on')
set(handles.pushbutton5,'visible','on')
set(handles.pushbutton8,'visible','off')
% --- Executes on button press in radiobutton2.
function radiobutton2_Callback(hObject, eventdata, handles)
% hObject    handle to radiobutton2 (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 radiobutton2
%选择单选按钮
set(handles.radiobutton2,'value',1)
set(handles.radiobutton1,'value',0)
set(handles.radiobutton3,'value',0)
set(handles.radiobutton4,'value',0)
%获得输入数值
    A=str2num(get(handles.edit1,'string'))
    B=str2num(get(handles.edit2,'string'))
    C=str2num(get(handles.edit3,'string'))
    D=str2num(get(handles.edit4,'string'))
    sys=ss(A,B,C,D)
%将状态空间模型转换为传递函数模型
    [numo,deno]=ss2tf(A,B,C,D)
 numc=numo
 n=poly2sym(numo)
 d=poly2sym(deno)
 denc=sym2poly(n+d)