结论： ， 我们可以在串联滞后校正中降低对数幅频特性曲线的幅值 ， 改善系统的稳态性能；同时还在串联超前校正中提供附加的相位 ， 增大系统的相角裕度 。
串联超前一滞后校正的优点在于：增大了系统的频带宽度 ， 使过渡过程的时间缩短 。
在只用串联超前校正或串联滞后校正难以满足给出的要求时 ，即在要求的校正后的系统稳态和动态性能都较高的情况下 ， 应考虑采用串联超前一滞后校正 。
主程序 。

41、如下：function varargout = untitled1(varargin)% UNTITLED1 M-file for untitled1.fig% UNTITLED1, by itself, creates a new UNTITLED1 or raises the existing% singleton*.% H = UNTITLED1 returns the handle to a new UNTITLED1 or the handle to% the existing singleton*.% UNTITLED1(CALLBACK,hObject,eventData,han 。

42、dles,.) calls the local% function named CALLBACK in UNTITLED1.M with the given input arguments.% UNTITLED1(Property,Value,.) creates a new UNTITLED1 or raises the% existing singleton*. Starting from the left, property value pairs are% applied to the GUI before untitled1_OpeningFunction gets called.。

43、An% unrecognized property name or invalid value makes property application% stop. All inputs are passed to untitled1_OpeningFcn via varargin.% *See GUI Options on GUIDEs Tools menu. Choose GUI allows only one% instance to run (singleton).% See also: GUIDE, GUIDATA, GUIHANDLES% Copyright 2002-2003 Th 。

44、e MathWorks, Inc.% Edit the above text to modify the response to help untitled1% Last Modified by GUIDE v2.5 24-May-2011 21:41:36% Begin initialization code - DO NOT EDITgui_Singleton = 1;
gui_State = struct(gui_Name, mfilename, .gui_Singleton, gui_Singleton, .gui_OpeningFcn, untitled1_OpeningFcn, .g 。

45、ui_OutputFcn, untitled1_OutputFcn, .gui_LayoutFcn, , .gui_Callback, );
if nargin & ischar(varargin1)gui_State.gui_Callback = str2func(varargin1);
endif nargoutvarargout1:nargout = gui_mainfcn(gui_State, varargin:);
elsegui_mainfcn(gui_State, varargin:);
end% End initialization code - DO NOT EDIT% - Exec 。

46、utes just before untitled1 is made visible.function untitled1_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。

47、(see GUIDATA)% varargin command line arguments to untitled1 (see VARARGIN)% Choose default command line output for untitled1handles.output = hObject;
% Update handles structureguidata(hObject, handles);
% UIWAIT makes untitled1 wait for user response (see UIRESUME)% uiwait(handles.figure1);
% - Outputs 。

48、 from this function are returned to the command line.function varargout = untitled1_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 w 。

49、ith handles and user data (see GUIDATA)% Get default command line output from handles structurevarargout1 = handles.output;
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 wit 。

50、h 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 edit2_CreateFcn(hObject, eventdata, handles)% hObject ha 。

51、ndle 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 ispcset(hObject,BackgroundColor,white);
elseset( 。

52、hObject,BackgroundColor,get(0,defaultUicontrolBackgroundColor);
endfunction 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 。

53、,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 edit3_CreateFcn(hObject, eventdata, handles)% hObject handle to edit3 (see GCBO)% eventdata reserved - to be defi 。

54、ned 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 ispcset(hObject,BackgroundColor,white);
elseset(hObject,BackgroundColor,get(0,defaultUicontrolBackgroundC 。

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标题：毕业设计论文基于频率特 性的典型系统校正设计及仿真 研究|毕业设计（论文）—基于频率特性的典型系统校正设计及仿真研究( 七 )