Meny

Javascript is not activated in your browser. This website needs javascript activated to work properly.
Du är här

Systems with Lebesgue sampling

Publiceringsår: 2003
Språk: Engelska
Sidor: 1-13
Publikation/Tidskrift/Serie: Directions in Mathematical Systems Theory and Optimization (Lecture Notes in Control and Information Sciences)
Volym: 286
Dokumenttyp: Del av eller Kapitel i bok
Förlag: Springer Berlin / Heidelberg

Sammanfattning

Sampling is normally done periodically in time. For linear time invariant systems this leads to closed loop systems that linear and periodic. Many properties can be investigated by considering the behavior of the systems at times that are synchronized with the sampling instants. This leads to drastic simplifications because the systems can be described by difference equations with constant coefficients. This is the standard approach used today when designing digital controllers. Using an analog from integration theory, periodic sampling can also be called Riemann sampling. Lebesgue sampling or event based sampling, is an alternative to Riemann sampling, it means that signals are sampled only when measurements pass certain limits. This type of sampling is natural when using many digital sensors such as encoders. Systems with Lebesgue sampling are much harder to analyze than systems with Riemann sampling, because the time varying nature of the closed loop system can not be avoided. In this paper we investigate some systems with Lebesgue sampling: Analysis of simple systems shows that Lebesgue sampling gives better performance than Riemann sampling.

Disputation

Nyckelord

  • Technology and Engineering

Övriga

Published
  • ISSN: 0170-8643

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen