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Tronci, Enrico |
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Title |
Formally Modeling a Metal Processing Plant and its Closed Loop Specifications |
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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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Call Number |
Sapienza @ mari @ hase99 |
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50 |
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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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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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Sapienza @ mari @ ase99 |
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49 |
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Author |
Tronci, Enrico |
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Title |
Automatic Synthesis of Controllers from Formal Specifications |
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1998 |
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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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Sapienza @ mari @ icfem98 |
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52 |
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Author |
Tronci, Enrico |
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Title |
On Computing Optimal Controllers for Finite State Systems |
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1997 |
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CDC '97: Proceedings of the 36th IEEE International Conference on Decision and Control |
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IEEE Computer Society |
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Washington, DC, USA |
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Sapienza @ mari @ cdc97 |
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66 |
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Author |
Tronci, Enrico |
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Title |
Optimal Finite State Supervisory Control |
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1996 |
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CDC '96: Proceedings of the 35th IEEE International Conference on Decision and Control |
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Supervisory Controllers are Discrete Event Dynamic Systems (DEDSs) forming the discrete core of a Hybrid Control System. We address the problem of automatic synthesis of Optimal Finite State Supervisory Controllers (OSCs). We show that Boolean First Order Logic (BFOL) and Binary Decision Diagrams (BDDs) are an effective methodological and practical framework for Optimal Finite State Supervisory Control. Using BFOL programs (i.e. systems of boolean functional equations) and BDDs we give a symbolic (i.e. BDD based) algorithm for automatic synthesis of OSCs. Our OSC synthesis algorithm can handle arbitrary sets of final states as well as plant transition relations containing loops and uncontrollable events (e.g. failures). We report on experimental results on the use of our OSC synthesis algorithm to synthesize a C program implementing a minimum fuel OSC for two autonomous vehicles moving on a 4 x 4 grid. |
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IEEE Computer Society |
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Washington, DC, USA |
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yes |
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Call Number |
Sapienza @ mari @ cdc96 |
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67 |
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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 |
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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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1996 |
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Theoretical Computer Science |
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160 |
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1&2 |
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185-216 |
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Sapienza @ mari @ tcs96a |
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55 |
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Author |
Tronci, Enrico |
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Title |
Defining Data Structures via Böhm-Out |
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1995 |
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J. Funct. Program. |
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5 |
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1 |
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51-64 |
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We show that any recursively enumerable subset of a data structure can be regarded as the solution set to a B??hm-out problem. |
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yes |
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Call Number |
Sapienza @ mari @ jfp95 |
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57 |
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Author |
Tronci, Enrico |
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Title |
Hardware Verification, Boolean Logic Programming, Boolean Functional Programming |
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Conference Article |
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1995 |
Publication |
Tenth Annual IEEE Symposium on Logic in Computer Science (LICS) |
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408-418 |
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One of the main obstacles to automatic verification of finite state systems (FSSs) is state explosion. In this respect automatic verification of an FSS M using model checking and binary decision diagrams (BDDs) has an intrinsic limitation: no automatic global optimization of the verification task is possible until a BDD representation for M is generated. This is because systems and specifications are defined using different languages. To perform global optimization before generating a BDD representation for M we propose to use the same language to define systems and specifications. We show that first order logic on a Boolean domain yields an efficient functional programming language that can be used to represent, specify and automatically verify FSSs, e.g. on a SUN Sparc Station 2 we were able to automatically verify a 64 bit commercial multiplier. |
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IEEE Computer Society |
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San Diego, California |
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Call Number |
Sapienza @ mari @ lics95 |
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56 |
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Author |
Tronci, Enrico |
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Title |
Equational Programming in lambda-calculus |
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1991 |
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Sixth Annual IEEE Symposium on Logic in Computer Science (LICS) |
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191-202 |
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IEEE Computer Society |
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Amsterdam, The Netherlands |
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Sapienza @ mari @ lics91 |
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58 |
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