The proportional element (P element)

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The P element describes a pure proportional relationship between input and output:

(4.19)

with the arbitrary positive or negative constant

is called the gain of the P element. The transfer function of this system is

(4.20)

The locus of the frequency response

(4.21)

is for all frequencies a point on the real axis with distance

from the origin. This means that the phase response

is zero for

for

. The characteristic of the magnitude is

Next: The integrator (I element) Up: Some important transfer function Previous: Some important transfer function Contents

Christian Schmid 2005-05-09