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Author |
Tronci, Enrico |
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Title |
Automatic Synthesis of Control Software for an Industrial Automation Control System |
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Conference Article |
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Year |
1999 |
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Proc.of: 14th IEEE International Conference on: Automated Software Engineering (ASE) |
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247-250 |
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We present a case study on automatic synthesis of control software from formal specifications for an industrial automation control system. Our aim is to compare the effectiveness (i.e. design effort and controller quality) of automatic controller synthesis from closed loop formal specifications with that of manual controller design, followed by automatic verification. Our experimental results show that for industrial automation control systems, automatic synthesis is a viable and profitable (especially as far as design effort is concerned) alternative to manual design, followed by automatic verification. |
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Cocoa Beach, Florida, USA |
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yes |
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Call Number |
Sapienza @ mari @ ase99 |
Serial |
49 |
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Author |
Tronci, Enrico |
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Title |
Formally Modeling a Metal Processing Plant and its Closed Loop Specifications |
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Conference Article |
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Year |
1999 |
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4th IEEE International Symposium on High-Assurance Systems Engineering (HASE) |
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151 |
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We present a case study on automatic synthesis of control software from formal specifications for an industrial automation control system. Our aim is to compare the effectiveness (i.e. design effort and controller quality) of automatic controller synthesis from closed loop formal specifications with that of manual controller design followed by automatic verification. The system to be controlled (plant) models a metal processing facility near Karlsruhe. We succeeded in automatically generating C code implementing a (correct by construction) embedded controller for such a plant from closed loop formal specifications. Our experimental results show that for industrial automation control systems automatic synthesis is a viable and profitable (especially as far as design effort is concerned) alternative to manual design followed by automatic verification. |
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IEEE Computer Society |
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Washington, D.C, USA |
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0-7695-0418-3 |
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yes |
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Sapienza @ mari @ hase99 |
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50 |
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Author |
Fantechi, Alessandro; Gnesi, Stefania; Mazzanti, Franco; Pugliese, Rosario; Tronci, Enrico |
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Title |
A Symbolic Model Checker for ACTL |
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Conference Article |
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Year |
1998 |
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International Workshop on Current Trends in Applied Formal Method (FM-Trends) |
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228-242 |
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We present SAM, a symbolic model checker for ACTL, the action-based version of CTL. SAM relies on implicit representations of Labeled Transition Systems (LTSs), the semantic domain for ACTL formulae, and uses symbolic manipulation algorithms. SAM has been realized by translating (networks of) LTSs and, possibly recursive, ACTL formulae into BSP (Boolean Symbolic Programming), a programming language aiming at defining computations on boolean functions, and by using the BSP interpreter to carry out computations (i.e. verifications). |
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Springer |
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Boppard, Germany |
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Hutter, D.; Stephan, W.; Traverso, P.; Ullmann, M. |
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Lecture Notes in Computer Science |
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1641 |
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3-540-66462-9 |
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yes |
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Call Number |
Sapienza @ mari @ fm-trends98 |
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51 |
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Author |
Tronci, Enrico |
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Title |
Automatic Synthesis of Controllers from Formal Specifications |
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Conference Article |
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Year |
1998 |
Publication |
Proc of 2nd IEEE International Conference on Formal Engineering Methods (ICFEM) |
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134-143 |
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Many safety critical reactive systems are indeed embedded control systems. Usually a control system can be partitioned into two main subsystems: a controller and a plant. Roughly speaking: the controller observes the state of the plant and sends commands (stimulus) to the plant to achieve predefined goals. We show that when the plant can be modeled as a deterministic finite state system (FSS) it is possible to effectively use formal methods to automatically synthesize the program implementing the controller from the plant model and the given formal specifications for the closed loop system (plant+controller). This guarantees that the controller program is correct by construction. To the best of our knowledge there is no previously published effective algorithm to extract executable code for the controller from closed loop formal specifications. We show practical usefulness of our techniques by giving experimental results on their use to synthesize C programs implementing optimal controllers (OCs) for plants with more than 109 states. |
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Brisbane, Queensland, Australia |
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yes |
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Sapienza @ mari @ icfem98 |
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52 |
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Author |
Pugliese, Rosario; Tronci, Enrico |
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Title |
Automatic Verification of a Hydroelectric Power Plant |
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Conference Article |
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Year |
1996 |
Publication |
Third International Symposium of Formal Methods Europe (FME), Co-Sponsored by IFIP WG 14.3 |
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425-444 |
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We analyze the specification of a hydroelectric power plant by ENEL (the Italian Electric Company). Our goal is to show that for the specification of the plant (its control system in particular) some given properties hold. We were provided with an informal specification of the plant. From such informal specification we wrote a formal specification using the CCS/Meije process algebra formalism. We defined properties using μ-calculus. Automatic verification was carried out using model checking. This was done by translating our process algebra definitions (the model) and μ-calculus formulas into BDDs. In this paper we present the informal specification of the plant, its formal specification, some of the properties we verified and experimental results. |
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Springer |
Place of Publication |
Oxford, UK |
Editor |
Gaudel, M.-C.; Woodcock, J. |
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Lecture Notes in Computer Science |
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Series Volume |
1051 |
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3-540-60973-3 |
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yes |
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Call Number |
Sapienza @ mari @ fme96 |
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53 |
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Author |
Tronci, Enrico |
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Title |
Equational Programming in Lambda-Calculus via SL-Systems. Part 1 |
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Journal Article |
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Year |
1996 |
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Theoretical Computer Science |
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160 |
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1&2 |
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145-184 |
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yes |
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Call Number |
Sapienza @ mari @ tcs96 |
Serial |
54 |
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Author |
Tronci, Enrico |
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Title |
Equational Programming in Lambda-Calculus via SL-Systems. Part 2 |
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Journal Article |
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Year |
1996 |
Publication |
Theoretical Computer Science |
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160 |
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1&2 |
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185-216 |
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yes |
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Sapienza @ mari @ tcs96a |
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55 |
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Author |
Tronci, Enrico |
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Title |
Equational Programming in lambda-calculus |
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Conference Article |
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Year |
1991 |
Publication |
Sixth Annual IEEE Symposium on Logic in Computer Science (LICS) |
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191-202 |
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IEEE Computer Society |
Place of Publication |
Amsterdam, The Netherlands |
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yes |
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Call Number |
Sapienza @ mari @ lics91 |
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58 |
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Author |
Bobbio, Andrea; Bologna, Sandro; Minichino, Michele; Ciancamerla, Ester; Incalcaterra, Piero; Kropp, Corrado; Tronci, Enrico |
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Title |
Advanced techniques for safety analysis applied to the gas turbine control system of Icaro co generative plant |
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Conference Article |
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2001 |
Publication |
X Convegno Tecnologie e Sistemi Energetici Complessi |
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339-350 |
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The paper describes two complementary and integrable approaches, a probabilistic one and a deterministic one, based on classic and advanced modelling techniques for safety analysis of complex computer based systems. The probabilistic approach is based on classical and innovative probabilistic analysis methods. The deterministic approach is based on formal verification methods. Such approaches are applied to the gas turbine control system of ICARO co generative plant, in operation at ENEA CR Casaccia. The main difference between the two approaches, behind the underlining different theories, is that the probabilistic one addresses the control system by itself, as the set of sensors, processing units and actuators, while the deterministic one also includes the behaviour of the equipment under control which interacts with the control system. The final aim of the research, documented in this paper, is to explore an innovative method which put the probabilistic and deterministic approaches in a strong relation to overcome the drawbacks of their isolated, selective and fragmented use which can lead to inconsistencies in the evaluation results. |
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Genova, Italy |
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yes |
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Call Number |
Sapienza @ mari @ tesec01 |
Serial |
65 |
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Author |
Intrigila, Benedetto; Salvo, Ivano; Sorgi, Stefano |
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Title |
A characterization of weakly Church-Rosser abstract reduction systems that are not Church-Rosser |
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Year |
2001 |
Publication |
Information and Computation |
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171 |
Issue |
2 |
Pages |
137-155 |
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Abstract |
Basic properties of rewriting systems can be stated in the framework of abstract reduction systems (ARS). Properties like confluence (or Church-Rosser, CR) and weak confluence (or weak Church-Rosser, WCR) and their relationships can be studied in this setting: as a matter of fact, well-known counterexamples to the implication WCR CR have been formulated as ARS. In this paper, starting from the observation that such counterexamples are structurally similar, we set out a graph-theoretic characterization of WCR ARS that is not CR in terms of a suitable class of reduction graphs, such that in every WCR not CR ARS, we can embed at least one element of this class. Moreover, we give a tighter characterization for a restricted class of ARS enjoying a suitable regularity condition. Finally, as a consequence of our approach, we prove some interesting results about ARS using the mathematical tools developed. In particular, we prove an extension of the Newman’s lemma and we find out conditions that, once assumed together with WCR property, ensure the unique normal form property. The Appendix treats two interesting examples, both generated by graph-rewriting rules, with specific combinatorial properties. |
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Academic Press, Inc. |
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Duluth, MN, USA |
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0890-5401 |
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yes |
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Call Number |
Sapienza @ mari @ Intrigila-Salvo-Sorgi:01 |
Serial |
68 |
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