A scalable and efficient approach for obtaining measurements in CAN-Based control systems

The availability of small inexpensive sensor elements enables the employment of large wired or wireless sensor networks for feeding control systems. Unfortunately, the need to transmit a large number of sensor measurements over a network negatively affects the timing parameters of the control loop....

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Bibliographic Details
Main Author: Andersson, Björn (author)
Other Authors: Pereira, Nuno (author), Elmenreich, Wilfried (author), Tovar, Eduardo (author), Pacheco, Filipe (author), Cruz, Nuno (author)
Format: article
Language:eng
Published: 2014
Subjects:
Process control
Transducers
Data processing
Measurement system data handling
Local area networks
Online Access:http://hdl.handle.net/10400.22/3907
Country:Portugal
Oai:oai:recipp.ipp.pt:10400.22/3907
Description
Summary:The availability of small inexpensive sensor elements enables the employment of large wired or wireless sensor networks for feeding control systems. Unfortunately, the need to transmit a large number of sensor measurements over a network negatively affects the timing parameters of the control loop. This paper presents a solution to this problem by representing sensor measurements with an approximate representation-an interpolation of sensor measurements as a function of space coordinates. A priority-based medium access control (MAC) protocol is used to select the sensor messages with high information content. Thus, the information from a large number of sensor measurements is conveyed within a few messages. This approach greatly reduces the time for obtaining a snapshot of the environment state and therefore supports the real-time requirements of feedback control loops.

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