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Information system security for industrial plants is a topic of increasing importance. Effective and cost-efficient security solutions require some kind of industry consensus or standardization. This paper examines the interests of the various stakeholders in the industrial security field (e.g. society, plant owners, service providers, automation vendors, and consultants) and evaluates some of the...
We introduce a new methodology for the specification and the design of the control logic of automated manufacturing systems. Our aim is to make specification express just what is necessary earlier in the design process. This permits to produce an optimized work cycle for the system and makes both production recovery calculation and code generation easier. The methodology is based on a modular modeling...
This paper presents the architecture, the system implementation and the performance evaluation of an innovative Internet-based service for object position tracing and tracking (T&T). It supports "full" T&T, as tracking data are not limited only to warehouse check-ins/checkouts, but are extended to the whole transport process, i.e., even when the traced item is on the road, taking...
In this paper the problem of regressor selection in virtual sensor design is addressed. In particular nonlinear models designed by experimental data are used to estimate relevant process variables of an industrial plant. The plant considered is a Sulphur Recovery Unit of a large refinery settled in Sicily. The proposed approach is used to face with the problem of input regressor selection of NMA models...
The paper presents a modular control model to develop the control functions for manufacturing systems and its implementation using IEC 61499 function blocks. In particular, a new control module for automation objects is formally specified and its use on a hierarchical functional architecture has been discussed and the possible distribution of its IEC 61499 implementation is investigated. Finally,...
Remote control involves several issues that degrade seriously the performance of the plant to be controlled. This paper presents a strategy improving the characteristics of the remote control system, using an online adaptive neural net, in order to learn the variations of the remote system parameters to minimize the errors. This strategy is successfully applied to a client-server remote control system...
A generic heuristic algorithm is introduced for the derivation of "common" PI controllers that is PI controllers that achieve specific performance requirements simultaneously for all members of a set of linear models, called the target set. Common PI controllers find application for the control of processes with multi-linear description, since they can achieve safe and satisfactory performance...
In high volume manufacturing (HVM), system control is shared between automation and human workers. The social organisation of workers plays an important role in supporting human decisions. Advances in the application of automation to a system, may change the social organisation associated with its operation. It establishes new work roles with broader information demands that require advanced decision...
The acceptance of formal methods in industry is a challenging task mainly due to difficult learning process and the lack of the tools and methods helping control engineer to interpret the results of formal verification procedure. We model existing source code of the controller and controller related information (controller model) along with controlled object (plant model) and verify modeled system...
In this paper, an adaptive inverse control with internal model control (IMC) structure is proposed and implemented on a robotic arm manipulator system. The plant is stabilized using a simple lead-lag controller and the inverse of the plant is estimated using normalized least mean square (nLMS) algorithm. Radial base transfer function is used as an input mask to the adaptive algorithm. A delayed version...
To properly deal with the increasing complexity of industrial distributed and agile manufacturing control systems, the use of methods and tools that support the designer in the definition, implementation and verification of intelligent logic control software is more and more necessary. Nowadays, many different software tools are available to face the rapid prototyping and closed loop simulation based...
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