MATLAB CONTROL SYSTEM TOOLBOX 9 Guia do Utilizador descarregar pdf (Página 562)

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pole

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11pole

Purpose Compute the poles of an LTI system

Syntax p = pole(sys)

Description pole computes the poles p of the SISO or M IMO LTI model sys.

Algorithm For state-space models, the poles are the eigenvalues of the matrix, or the

generalized eigenvalues of in the descriptor case.

For S ISO t ransfer functions or zero-pole-gain models, the poles a re simply the

denominator roots (see

roots).

For MIMO transfer functions (or zero-pole-gain models), the poles are

computed as the union of the poles for each SISO entry. If s ome columns or

rows ha ve a common denominator, the roots of this denominator are counted

only once.

Limitations Multiple poles are numerically sensitive and cannot be computed to high

accuracy. A pole with multiplicity typically gives rise to a cluster of

computed poles distributed on a circle with center and radius of order

See Also damp Damping and natural frequency of system poles

esort, dsort Sort system poles

pzmap Pole-zero map

zero Compute (transmission) zeros

–

eps

1 m

⁄

≈

1 2 ... 557 558 559 560 561 562 563 564 565 566 567 ... 648 649

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