信号与线性系统PPT (5).pdf

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1、Purpose of the experimentExperiment contentPreparatory knowledge Analysis of experimental results Experiment report writingExperimental steps信号与线性系统综合实验（Comprehensive experiment of signal and linear system）1.Master the time domain and frequency domain comprehensive analysis method of continuous time

2、 signal and system;2.Master the time-domain and frequency-domain characteristics of continuous time signal and system using MATLAB software;3.Through the comprehensive analysis of continuous time signal and system,deepen the signal spectrum,system function.Understand the concepts of system frequency

3、 characteristics,impulse response,step response,etc.,and understand the system function zero.The relationship between the pole distribution and the frequency characteristics and stability of the system.Purpose of the experiment信号与线性系统综合实验（Comprehensive experiment of signal and linear system）Experime

4、nt content Part I:basic part （1）A second-order or third-order continuous time system is designed,and the designed system is realized by different realization structures(direct,cascade and parallel).The s-domain simulation block diagram of the system is given,and the time-domain and frequency-domain

5、characteristics of the system are analyzed by MATLAB software.（2）Change the parameters of the above system,observe and analyze various response characteristics of the system,observe and analyze the relationship between the change of zero and pole of the system and the stability of the system.（3）Give

6、n an input excitation signal,observe and analyze the change of the output response spectrum after the signal passes through the above system,and analyze the reason.信号与线性系统综合实验（Comprehensive experiment of signal and linear system）Experiment content Part II:expansion （1）Construct a periodic continuous

7、 signal(each component has its own frequency)f(t)which contains several different frequency components,intercept the different length of the signal(note that the intercept length should not be less than one cycle of the lowest frequency component),analyze the frequency spectrum of the intercepted si

8、gnal with MATLAB software respectively(draw the spectrum diagram,including amplitude spectrum and phase spectrum).Compare the difference of the spectrum of different length signal,compare with the theoretical spectrum,and use the knowledge to analyze the reasons of these differences.(review convolut

9、ion theorem in frequency domain)信号与线性系统综合实验（Comprehensive experiment of signal and linear system）Experiment content Part II:expansion (2）A LTI continuous system is designed as a filter to filter the signal constructed in the previous step(filter out some frequency components and keep another part).T

10、he system function H(s)of the filter is designed by distributing appropriate poles and zeros in the s plane.The frequency response(including amplitude frequency response and phase frequency response)of the filter is analyzed with MATLAB software,and the frequency response waveform is drawn.Using the

11、 knowledge,the relationship between the amplitude frequency response and the position of zero pole is analyzed.（3）Based on the constructed f(t)and H(s),the filtering output signal y(t)and the frequency response H(j)of y(t)are calculated by theoretical analysis,and the waveforms of y(t)and H(j)are dr

12、awn by MATLAB.。信号与线性系统综合实验（Comprehensive experiment of signal and linear system）Experimental requirements 1.According to the requirements of the above experiment contents,the experiment scheme and steps are designed.That is,to specify the above experimental content.For example,determine the specific

13、 signal form,filter characteristics;determine the relevant matlab experimental parameters,such as signal intercept length,discrete processing time interval,etc.).2.Before the experiment,we should complete the preparation work of related experimental Preview:review the related theoretical knowledge,d

14、educe the theoretical results,write the experimental program,and analyze the expected results of the experiment.3.Individuals independently determine the experimental scheme and steps,complete the recording of experimental data and analysis of results.The selection of signal,filter and experimental

15、parameters shall not be completely the same as others!信号与线性系统综合实验（Comprehensive experiment of signal and linear system）Main content requirements of experimental report1.Experiment scheme and procedure(including experiment procedure);2.Experimental results and theoretical analysis results(including n

16、ecessary theoretical analysis process)from each step;3.Analysis of experimental results(mainly for the requirements of experimental content,necessary analysis process is required);4.Experimental summary,experience and suggestions for improvement of the experimental method,means and process.信号与线性系统综合

17、实验（Comprehensive experiment of signal and linear system）Main content requirements of experimental reportNote:the contents listed above do not refer to the organizational structure of the experimental report.The experimental report should be written with the experimental steps as the main line,and th

18、e results and related analysis of each experimental step should be integrated into each specific experimental step.In addition to the purpose of the experiment,the rest of the experimental instructions do not have to be copied in the experimental report!信号与线性系统综合实验（Comprehensive experiment of signal and linear system）