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Source-channel codi...
Source-channel coding for closed-loop control
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- Bao, Lei, 1976- (författare)
- KTH,Skolan för elektro- och systemteknik (EES)
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- Skoglund, Mikael (preses)
- KTH,Skolan för elektro- och systemteknik (EES)
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- Johansson, Karl Henrik (preses)
- KTH,Skolan för elektro- och systemteknik (EES)
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- Gunnarssson, Fredrik, Dr. (opponent)
- Linköping Universitet
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(creator_code:org_t)
- Stockholm : Elektrotekniska system, 2006
- Engelska ix, 106 s.
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Serie: Trita-EE, 1653-5146 ; 2006:013
- Relaterad länk:
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https://kth.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Networked embedded control systems are present almost everywhere. A recent trend is to introduce wireless sensor networks in these systems, to take advantage of the added mobility and flexibility offered by wireless solutions. In such networks, the sensor observations are typically quantized and transmitted over noisy links. Concerning the problem of closed-loop control over such non-ideal communication channels, relatively few works have appeared so far. This thesis contributes to this field, by studying some fundamentally important problems in the design of joint source--channel coding and optimal control. The main part of the thesis is devoted to joint design of the coding and control for scalar linear plants, whose state feedbacks are transmitted over binary symmetric channels. The performance is measured by a finite-horizon linear quadratic cost function. The certainty equivalence property of the studied systems is utilized, since it simplifies the overall design by separating the estimation and the control problems. An iterative optimization algorithm for training the encoder--decoder pairs, taking channel errors into account in the quantizer design, is proposed. Monte Carlo simulations demonstrate promising improvements in performance compared to traditional approaches. Event-triggered control strategies are a promising solution to the problem of efficient utilization of communication resources. The basic idea is to let each control loop communicate only when necessary. Event-triggered and quantized control are combined for plants affected by rarely occurring disturbances. Numerical experiments show that it is possible to achieve good control performance with limited control actuation and sensor communication.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Telekommunikation (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Telecommunications (hsv//eng)
Nyckelord
- optimal control
- joint source--channel coding
- source-channel coding
- joint coding and control
- certainty equivalence
- linear quadratic control
- stochastic control
- wireless sensor network
- Telecommunication
- Telekommunikation
Publikations- och innehållstyp
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