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In networked control systems several devices (controllers, sensors and actuators) share a common communication resource. This feature can introduce variable and even random delays when those devices try to transmit information through the shared medium. The limited bandwidth capabilities of the transmission medium also can restrict the freedom to set the sampling periods in the control loop. An attempt...
Nowadays, in industrial control applications, is rather usual to sample and update different variables at different rates, although it is common to consider all these activities equally and regularly spaced on time. These applications can be found, for example, on real-time operating systems by decomposing them into several tasks in such a way that pre-emption and blocking may appear due to task priorities...
Some issues about multirate systems and signals are reviewed in this contribution. First, different models for these signals and systems are considered. Discrete time sequences or blocks of data structured in a sequential or shifted form, allow the representation of signals sampled at different sampling rates, all of them being globally periodic. Process models dealing with sequences or blocks of...
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