信号与线性系统PPT (3).pdf

Purpose of the experimentExperiment contentPreparatory knowledge Analysis of experimental resultsExperiment report writingExperimental steps1.Through this experiment,grasp the realization method of continuous time signal Laplace transform and inverse Laplace transform and programming idea,master the drawing method of zero pole diagram of system function.2.Understand the call format and function of function laplace()and function ilaplace().3.Understand the drawing of zero pole diagram of continuous system and the method of judging system stability by using zero pole diagram.1.Confirmatory experiment (1)Call correlation function programming to realize the Laplace transform of signal,and draw the surface graph of Laplace transform of signal;(2)By using correlation function programming,the inverse Laplace transform of the signal is realized,and the zero state response of the system is determined by transform domain analysis;(3)Using MATLAB language programming,draw the zero pole diagram of the system function of continuous LTI system,and judge the stability of the system from the zero pole diagram.2.Program design experiment(1)Function call formatCall formats of functions laplace()and ilaplace()Laplace transform of signal f(T)can be realized by using the function laplace().The calling format is as follows:L=Laplace(f)is the Laplace transform of the symbolic function f,and the default return function L is the function about s.L=Laplace(F,t)is the Laplace transform of the sign function f,and the return function L is the function about t.L=Laplace(F,W,z)is the Laplace transform of the function f of W,and the return function L is the function of Z.The inverse Laplace transform of signal f(s)can be realized by using the function ilaplace().The call format is as follows:F=ilaplace(L)is the inverse Laplace transform of function L(s),and the default return function f is the function about t.f=ilaplace(L,y)is the inverse Laplace transform of function L(s),and the return function f is a function about y.f=ilaplace(L,y,x)returns that function f is a function about X.(2)Judging the stability of the system from the zero pole diagram of the system functionThe stability of the system can be judged by the zero pole diagram of the system.For a continuous LTI system,if the poles of its system functions are all in the left half open plane of the plane,the system is stable;if there is only one order pole on the virtual axis,and the rest poles are all in the left half open plane of the plane,the system is critical stable;if there are two order poles on the virtual axis and two order poles above or there are poles in the right half plane of the plane,the system is unstable.The first part,confirmatory experiment.1.Laplace transform,which can use three-dimensional surface to draw continuous time signal,changes with complex variable s.2.Inverse Laplace transform3.Draw zero pole diagram of continuous systemThe second part,program design experiment.According to the title requirements of the experimental instruction,complete the program design.1.Complete the confirmatory experiment according to the content requirements of the experiment instruction,and make theoretical analysis on the data graph of the experiment results,fully understand the physical meaning and engineering application of the knowledge points involved,fully understand and master the software programming methods used,and learn to use them.2.For the program design topic given in the guide book,first carry out theoretical calculation,and then program implementation;compare and analyze the results of theoretical calculation and program implementation,and summarize the skills of program design.Requirements for writing experiment reportName of experimental project1、Purpose of the experiment2、Experiment content and principle3、Experimental equipment(equipment,components,software tools,platforms)4、Experimental steps5、Experimental data and result analysis(part of the content of result analysis is handwritten,and all kinds of recording graphs should correspond to the corresponding analysis content,not all graphs can be printed together,and used as an attachment of the report,but the data graphs of each part correspond to the result analysis)6、Conclusion of the experiment(summary statement of the whole experiment)7、OthersIncluding:experimental summary,experience and suggestions for improvement of the experimental method,means and process.And each part is signed by the author.