Design of Networked Control Systems (NCSs) on the basis of interplays between Quality of Control and Quality of Service

Abstract

Abstract-The goal of this paper is to consider a co-design approach between the controller of a process control application and the frame scheduling of a Local Area Network (LAN). More precisely we present a bi-directional relation between the Quality of Control (QoC) provided by the controller and the Quality of Service (QoS) provided by the LAN (relation noted QoS⇋QoC). We present, first, the implementation of the relation QoS→QoC on the basis of a compensation method for time delays called dominant pole method, and second, the implementation of the relation QoC→QoS on the basis of the hybrid priorities for the frame scheduling. The final objective is the implementation of the bidirectional relation QoS⇋QoC which is the combination of the both relations QoS→QoC and QoC→QoS in order to have a more efficient NCSs design.

CAN-Based Networked Control Systems: A Co-Design of Time Delay Compensation and Message Scheduling

“…In the paper [3] , the proposed time delay compensation is designed according to the dominant pole method and the message scheduling is based on the control signal u. The authors proposed a message scheduling scheme based on hybrid priority for CAN network using the standard 11 bit ID field where the ID field is divided into 2 small levels.…”

“…Two main QoC parameters using for representing the transmission urgency are steady state error error e [2,12] and control signal u [3,9] . Some other works use the deadline [10,13] .…”

“…Concerning dynamic priority using to send the fca frame by the controller, there are two ways: the first one is that the controller use the Prio_dynk value which has just been computed [9] ; and the second one is to use the Prio_dynmax [2,3] . It is evident that the second way ensures that fca frame will be sent immediately after the reception of fsc frame (computational time delays in the controller is negligible).…”

Industrial Automation System on Device (IndASoD) -A device modeling industrial automation scenarios

“…The relationship between control system and communication can be seen from contexts of deterministic behavior and the PID Control aspect [6], [7].…”

A Co-Design for CAN-Based Networked Control Systems

“…The current objective of NCS design today is to consider a co-design in order to have an efficient control system [1,2]. Several works [2][3][4][5][6] have considered the co-design problems by combining control and scheduling messages. The works [2,3] have considered the pole-placement design for time delay compensation and Large Error First (LEF) scheduling algorithm for message scheduling.…”