time.m

matlab中GUI界面来实现用劳斯判据判断系统的稳定性

function varargout = time(varargin)
% TIME M-file for time.fig
%      TIME, by itself, creates a new TIME or raises the existing
%      singleton*.
%
%      H = TIME returns the handle to a new TIME or the handle to
%      the existing singleton*.
%
%      TIME('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in TIME.M with the given input arguments.
%
%      TIME('Property','Value',...) creates a new TIME or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before time_OpeningFunction gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to time_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 time

% Last Modified by GUIDE v2.5 28-Dec-2007 09:50:04

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @time_OpeningFcn, ...
                   'gui_OutputFcn',  @time_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 time is made visible.
function time_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 time (see VARARGIN)

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

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes time wait for user response (see UIRESUME)
% uiwait(handles.figure1);
set(handles.edit1, 'String',1);       %初始化各个编辑框，以方便输入
set(handles.edit2, 'String',1);
set(handles.edit3, 'String',1);
set(handles.edit4, 'String',1);
set(handles.edit10, 'String',[],'visible','off');
set(handles.edit7, 'String',0,'visible','off');
set(handles.edit8, 'String',0,'visible','off');
set(handles.edit9, 'String',0,'visible','off');
set(handles.text6,'visible','off')
set(handles.text8,'visible','off')
set(handles.text10,'visible','off')
set(handles.text12,'visible','off')
set(handles.text13,'visible','off')
set(handles.edit11,'string',0,'visible','off')

% --- Outputs from this function are returned to the command line.
function varargout = time_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)

% 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 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)
axes(handles.axes1)
cla
set(handles.edit7, 'String',0);
set(handles.edit8, 'String',0);
set(handles.edit9, 'String',0);
set(handles.edit10, 'String',[]);

A=get(handles.edit1,'string')
numforward=str2num(A);                 %得到前向通道传函分子
B=get(handles.edit2,'string');         
denforward=str2num(B);                 %得到前向通道传函分母
C=get(handles.edit3,'string');
numfeedback=str2num(C);                %得到反馈通道传函分子
D=get(handles.edit4,'string');
denfeedback=str2num(D);                %得到反馈通道传函分母

tffeedback=tf(numfeedback,denfeedback);

num=conv(numforward,numfeedback);
den=conv(denforward,denfeedback)
sys=tf(num,den);                        %得到开环传函

sys=feedback(sys,1)                     %得到闭环传函
dens=sys.den{1};                        %得到闭环特征根

[result,k]=routh(dens)                  %调用Routh判据函数判稳
set(handles.edit10,'visible','on')
set(handles.text6,'visible','on')
if result==1
    set(handles.edit10,'string','该系统稳定')
    set(handles.text13,'visible','off')
    set(handles.edit11,'string',0,'visible','off')
    set(handles.text8,'visible','on')
    set(handles.text10,'visible','on')
    set(handles.text12,'visible','on')
    set(handles.edit7,'visible','on');
    set(handles.edit8,'visible','on');
    set(handles.edit9,'visible','on');
    show(sys,tffeedback,handles)        %调用函数，输出各个性能指标并画出单位阶跃响应曲线
else 
    set(handles.edit10,'string','该系统不稳定')
    set(handles.text8,'visible','off')
    set(handles.text10,'visible','off')
    set(handles.text12,'visible','off')
    set(handles.edit7, 'String',0,'visible','off');
    set(handles.edit8, 'String',0,'visible','off');
    set(handles.edit9, 'String',0,'visible','off');
    set(handles.text13,'visible','on')
    set(handles.edit11,'string',k,'visible','on')
end





% --- Executes during object creation, after setting all properties.