- 16th October 2008, 02:50 #1
## Why are the eigenvalues of a matrix so important?

Why are the eigenvalues of a matrix is that important?

- 16th October 2008, 02:50

- 16th October 2008, 08:55 #2
## eigenvalue denominator

in case of system represented by a transfer function. the roots of the denominator are eigen values and their value is important to gain insigh in the stability of the systems. i think they have other advantages also but cant fgure it out..

regards

- 16th October 2008, 08:55

- 16th October 2008, 15:02 #3

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## moment of inertia and eigenvalues

Suppose you have a square matrix A and you have to find a function f(A). The eigen values are the solution of the characteristic equation |A-λI| = 0, which is a function F(λ). From this you can find any function of A using CH theorem.

One very important use of eigenvalues is finding the principal axes of a rotating system using moment of inertia tensor. Eigen values are required to diagonalize the matrix of the tensor to find them.

- 16th October 2008, 15:02

- 16th October 2008, 22:27 #4
## how to find transfer function from eigenvalues

To sohailkhanonline: Could you please be a little more clear, because what you are saying sounds interesting. You say, the roots of the denominator of a transfer function are eigenvalues. But eigenvalues of what? To find the eigenvalues you should have a matrix, so what is that matrix for your case.

Added after 1 minutes:

To subharpe: I think it is not a must to have a square matrix for eigenvalue calculation.

- 17th October 2008, 07:13 #5

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## how eigenvalues relates to transfer function

To senaydud:

I don't know if any non-square matrix can have a eigenvalue. Can you please be detailed on that?

With thanks

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- 18th October 2008, 02:20 #6
## Eigenvalues

yes I have checked with the matlab and it requires the matrix to be a square matrix. You are right