On the Application of Different Event-Based Sampling Strategies to the Control of a Simple Industrial Process

Sensors

José Sánchez¹  Miguel Ángel Guarnes² 

[1] Department of Computer Science and Automatic Control, UNED, C/ Juan del Rosal, 16, 28040 Madrid, Spain; E-Mail:;National University of San Luis, San Luis, Argentina; E-Mail:

关键词: send-on-delta;    event-based control;    PI controller;   

DOI  :  10.3390/s90906795

来源: mdpi

【 摘 要 】

This paper is an experimental study of the utilization of different event-based strategies for the automatic control of a simple but very representative industrial process: the level control of a tank. In an event-based control approach it is the triggering of a specific event, and not the time, that instructs the sensor to send the current state of the process to the controller, and the controller to compute a new control action and send it to the actuator. In the document, five control strategies based on different event-based sampling techniques are described, compared, and contrasted with a classical time-based control approach and a hybrid one. The common denominator in the time, the hybrid, and the event-based control approaches is the controller: a proportional-integral algorithm with adaptations depending on the selected control approach. To compare and contrast each one of the hybrid and the pure event-based control algorithms with the time-based counterpart, the two tasks that a control strategy must achieve (set-point following and disturbance rejection) are independently analyzed. The experimental study provides new proof concerning the ability of event-based control strategies to minimize the data exchange among the control agents (sensors, controllers, actuators) when an error-free control of the process is not a hard requirement.

【 授权许可】

CC BY   
© 2009 by the authors; licensee MDPI, Basel, Switzerland