Wang Gaoteng

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11 years, 288 days

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These are questions asked by Wang Gaoteng

I have two transfer functions,tf1,tf2, which describing two linear systems respectively.

tf1:=TransferFunction(sys1),tf2:=TransferFunction(sys2)

Sometimes, the transfer function is very complex which contains so many symbols, and retyping them manually is very time consuming.

Now, I want to connect them in series,namely,tf3:=tf1*tf2, of course, I can extract them respectively,that is,

a:=tf1:-tf[1,1],b=tf2:-tf[1,1],then multiply a and b,c:=a*b,and...

question1.3.mwI define a system differential equation, deq:=[equ1,equ2], and specifed input variable and output variable, then use command sys:=DiffEquation(deq,[A[ss]],T[m]).

Note that output variable T[m] is a delay function, T[m]=T[w](t-t[d]), where T[m] contained in equ2, and deq do not contains T[m].

When I add the delay condition T[m]=T[w](t-t[d]) to deq, and run the commands, then maple ruturns an warning:

example.3.mwsometimes, the system differential equations contain many parameters, such as K[t],K[a],L[a],R[a],etc.

Now, we input these differential equations to maple,namely,deq:=[...,...,...,...], of course, this input procedure consume much time.

Using sys:=DiffEquation(deq,[inputvariables],[outputvariables]) and tf:=TransferFunction(sys) yield the system transfer function.

Come under analysis, I find that a parameter, L[a...

QuetionLinearize.mwWhen I use 'Linearize' command to linearize a equation, linm:=Linearize(...), it returns a state space or, a differential equation.

Then I want to extract the matrices of the state space, I type linm[a], but failed.

Is there any way to extract the matrices a,b,c, and d from the output? Note that this problem is different from the one which had been submitted.

example.7.mwI have a question for a long time.

For some dynamic systems, I want to extract the matrices or the transfer functions which maple had yielded as a table. The table contains matrices or transfer function.

I want to extract them for other purposes, for example,using transfer function to plot its step response.

Now, is there any way to do this without retyping them manually? Becouse...

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