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IEVref:351-50-02ID:
Language:enStatus: Standard
Term: first-order lag element
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Definition: linear time-invariant transfer element the transfer function of which has exactly one real-value negative pole and no zero

Note 1 to entry: The transfer function of a first-order lag element is given as

V( s ) U( s ) = K Ρ 1+ T 1 s MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaamaalaaabaGaamOvamaabmaabaGaam4CaaGaayjkaiaawMcaaaqaaiaadwfadaqadaqaaiaadohaaiaawIcacaGLPaaaaaGaeyypa0ZaaSaaaeaacaWGlbWaaSbaaSqaaiaabg6aaeqaaaGcbaGaaGymaiabgUcaRiaadsfadaWgaaWcbaGaaGymaaqabaGccqGHflY1caWGZbaaaaaa@4603@

where
KPis the proportional action coefficient;
T1is the time constant;
sis the complex variable of the Laplace transform;
U(s)is the input transform;
V(s)is the output transform.

Note 1 to entry: This entry was numbered 351-28-13 in IEC 60050-351:2006.


Publication date:2013-11
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