lab021.m

控制系统仿真中的根轨迹MATLAB仿真源码

function varargout = lab021(varargin)
% LAB021 M-file for lab021.fig
%      LAB021, by itself, creates a new LAB021 or raises the existing
%      singleton*.
%
%      H = LAB021 returns the handle to a new LAB021 or the handle to
%      the existing singleton*.
%
%      LAB021('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in LAB021.M with the given input arguments.
%
%      LAB021('Property','Value',...) creates a new LAB021 or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before lab021_OpeningFunction gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to lab021_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 lab021

% Last Modified by GUIDE v2.5 25-May-2005 16:59:57

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @lab021_OpeningFcn, ...
                   'gui_OutputFcn',  @lab021_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 lab021 is made visible.
function lab021_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 lab021 (see VARARGIN)

% Choose default command line output for lab021
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes lab021 wait for user response (see UIRESUME)
% uiwait(handles.figure1);

%设置当前窗口名
str='参量根轨迹实验窗口';
set(gcf,'name',str,'numbertitle','off');

% --- Outputs from this function are returned to the command line.
function varargout = lab021_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 pushbutton_sure_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton_sure (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


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

%设置关闭窗口提示对话框
button=questdlg('Do you want to quit?',...
    'Quit Operation','Yes','No','No');
if strcmp(button,'Yes')
   close
elseif strcmp(button,'No')
    disp('Canceled file operation')
end



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


% --- Executes during object creation, after setting all properties.
function slider1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to slider1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background, change
%       'usewhitebg' to 0 to use default.  See ISPC and COMPUTER.
usewhitebg = 1;
if usewhitebg
    set(hObject,'BackgroundColor',[.9 .9 .9]);
else
    set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end


% --- Executes on slider movement.
function slider1_Callback(hObject, eventdata, handles)
% hObject    handle to slider1 (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,'Value') returns position of slider
%        get(hObject,'Min') and get(hObject,'Max') to determine range of slider

%绘制随T值变化的根轨迹图
set(handles.edit_t,'string',num2str(get(handles.slider1,'value')));
val1=str2num(get(handles.edit_t,'string'))
t=str2num(get(handles.edit_t,'string'))
if isnumeric(val1)&length(val1)==1&...
        val1>=get(handles.slider1,'Min')&...
        val1<=get(handles.slider1,'Max')
    set(handles.slider1,'Value',val1);
else  handles.numberofErrors=handles.numberofErrors+1;
    set(handles.edit_t,'String',...
        [handles.errorString,num2str(handle.numberofErrors)]);
    guidata(gcbo,handle);
end
num=[1];
den=[t t+1 1 0];
sys=tf(num,den)
subplot('Position',[0.123,0.257,0.355,0.422])
rlocus(sys)
%得出当系统稳定时K的取值范围
syms('x','w','k','real')
    n=poly2sym(k*num,x)
    d=poly2sym(den,x)
    f=n+d
    g=w*i
    h=compose(f,g)
    r=real(h)
    l=simplify(imag(h))
    [k,w]=solve(r,l)
    k1=sym2poly(k)
      if min(k1)<0
    set(handles.edit_stastic,'string',0)
else 
    set(handles.edit_stastic,'string',min(k1))
end
if max(k1)<=0
    set(handles.edit_stastic2,'string',inf)
else
    set(handles.edit_stastic2,'string',max(k1))
end


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


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


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

% Hint: slider controls usually have a light gray background, change
%       'usewhitebg' to 0 to use default.  See ISPC and COMPUTER.
usewhitebg = 1;
if usewhitebg
    set(hObject,'BackgroundColor',[.9 .9 .9]);
else
    set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end

% --- Executes during object creation, after setting all properties.
function analyze_Callback(hObject, eventdata, handles)
% hObject    handle to analyze (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
analyze1


% --- Executes during object creation, after setting all properties.
function edit_stastic2_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit_stastic2 (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 edit_stastic2_Callback(hObject, eventdata, handles)
% hObject    handle to edit_stastic2 (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 edit_stastic2 as text
%        str2double(get(hObject,'String')) returns contents of edit_stastic2 as a double