Remote maintenance of control system performance over the Internet

Abstract

Citation: YANG, DAI and KNOTT, 2007. Remote maintenance of control system performance over the internet. Control Engineering Practice, 15(5), pp. 533-544Additional Information:• This article was published in the journal, Control Prac- technologies. This paper focuses on developing a systematic method for the design of such a remote maintenance systems specifically for process control systems. Design issues of Internet-based remote maintenance systems for process control such as that proposed here include control performance assessment, fault detection, control performance maintenance, and heterogeneous data transfer over the Internet. A back-end and front-end architecture is proposed, in which all the heavy calculations are carried out locally. Light data and the characteristics of any heavy data are sent to the front-end located on the remote server for consideration by remote experts. The remote maintenance system is illustrated by reference to the implementation in a process control rig.

Robust Fault Detection for Networked Systems with Distributed Sensors

“…Moreover, from Theorem 1, we can confirm that for any uncertain parameters of (1) and (2), the parameters of the fault detection filter can be given by (27). Considering T¸= T, we can obtain the fault detection filter parameters of the form (31).…”

“…Performing congruence transformation to (21) first by diagfI, ¤, I, I, Ig (¤ is defined as before), and second by diagfI, T (21), the parameters of the fault detection filter satisfying (20) can be obtained by (27). The transfer function from v k tor k can be further given by…”

“…Due to the rapid development of network technology, more and more practical complex systems have their sensors, actuators, and controllers connected via communication networks [3,14,27,32]. These kinds of systems, also called networked control systems (NCSs), can be found in a variety of engineering areas such as automobiles, manufacturing plants, and aircrafts systems.…”

Remote-Tuning – Case Study of PI Controller for the First-Order-Plus-Dead-Time Systems

“…Remote access architectures may be implemented at different levels in the manufacturing control hierarchy: at process level, at supervisory level, and at system optimization level. The works of (Overstreet & Tzes, 1999) and (Yang et al, 2007) include remote control at the process level. In this case, the conventional discrete control structure must be changed to meet the diverging times of the Internet.…”

“…A mechanism for access control is also described, but the disadvantage of the system is that it consists of a proprietary solution, fully based on enterprise software to achieve monitoring and tuning for the controller. (Yang et al, 2007) presents the architecture for processes control maintenance based on the Internet. The studied characteristics include industrial system performance indices, and failures and successes detection in the degraded control performance.…”