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This paper discusses the algebraic design via Diophantine equations of dual-rate regulators generalizing the well-known interpolation constraints for the reference model in single-rate systems. The results are applicable to unstable plants. A simulation example on a robotic model is presented.
This work presents two applications of a novel tool developed for the approximate calculation of behavior in the domain of the frequency of Multirate Sampled-Data Control Systems. The cases presented here focus on the designing of digital regulators that operate with more than one sampling frequency, the aim being to stabilize the system in closed loop using relatively low sampling frequencies of...
It has been observed that the inclusion of Dual-Rate regulators in a sampled-data control loop occasionally introduces the phenomenon of intersample ripple in the output of the process being controlled. Several authors have offered explanations for this phenomenon which does not appear to derive from the control method. The aim of this brief report is to demonstrate that, by compensating in frequency...
This paper deals with the problem of simulating the sequence of events in the communication through one of the most commonly used fieldbuses: Profibus-DP. Control systems using a fieldbus or any other kind of shared communication medium, are known as Networked Control Systems. A detailed description of the operation of Profibus, when transmitting a signal in a round trip between slave and master devices,...
In networked control systems (NCS) environments is usual to find restrictions with data-acquisition frequency. If the control action updating can be faster than the output measurement, the use of a dual rate controller is a natural solution. Due to PIDs are useful controllers in industrial applications, in this paper a dual rate PID controller is designed splitting a conventional PID into two parts...
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