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Random Access Design for Wireless Control Systems | | Konstantinos Gatsis
; Alejandro Ribeiro
; George J. Pappas
; | | Date: |
2 May 2016 | | Abstract: | Interferences arising between wireless sensor-actuator systems communicating
over shared wireless channels adversely affect closed loop control performance.
To mitigate this problem we design appropriate channel access policies for
wireless control systems subject to channel fading. The design is posed as an
optimization problem where the total transmit power of the sensors is minimized
while desired control performance is guaranteed for each involved control loop.
Control performance is abstracted as a desired expected decrease rate of a
given Lyapunov function for each loop. We prove that the optimal channel access
policies are decoupled and, intuitively, each sensor balances the gains from
transmitting to its actuator with the negative interference effect on all other
control loops. Moreover the optimal policies are of a threshold nature, that
is, a sensor transmits only under favorable local fading conditions. Finally,
we show that the optimal policies can be computed by a distributed iterative
procedure which does not require coordination between the sensors. | | Source: | arXiv, 1605.0627 | | Services: | Forum | Review | PDF | Favorites | |
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