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Author | Mari, Federico; Melatti, Igor; Salvo, Ivano; Tronci, Enrico | ||||
Title | Synthesis of Quantized Feedback Control Software for Discrete Time Linear Hybrid Systems | Type | Conference Article | ||
Year | 2010 | Publication | Computer Aided Verification | Abbreviated Journal | |
Volume | Issue | Pages | 180-195 | ||
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Abstract | We present an algorithm that given a Discrete Time Linear Hybrid System returns a correct-by-construction software implementation K for a (near time optimal) robust quantized feedback controller for along with the set of states on which K is guaranteed to work correctly (controllable region). Furthermore, K has a Worst Case Execution Time linear in the number of bits of the quantization schema. | ||||
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Publisher | Springer Berlin / Heidelberg | Place of Publication | Editor ![]() |
Touili, T.; Cook, B.; Jackson, P. | |
Language | Summary Language | Original Title | |||
Series Editor | Series Title | Lecture Notes in Computer Science | Abbreviated Series Title | ||
Series Volume | 6174 | Series Issue | Edition | ||
ISSN | ISBN | Medium | |||
Area | Expedition | Conference | |||
Notes | Approved | yes | |||
Call Number | Sapienza @ mari @ cav2010 | Serial | 16 | ||
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Author | Mari, Federico; Melatti, Igor; Salvo, Ivano; Tronci, Enrico | ||||
Title | Undecidability of Quantized State Feedback Control for Discrete Time Linear Hybrid Systems | Type | Book Chapter | ||
Year | 2012 | Publication | Theoretical Aspects of Computing – ICTAC 2012 | Abbreviated Journal | |
Volume | Issue | Pages | 243-258 | ||
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Publisher | Springer Berlin Heidelberg | Place of Publication | Editor ![]() |
Roychoudhury, A.; D'Souza, M. | |
Language | Summary Language | Original Title | |||
Series Editor | Series Title | Lecture Notes in Computer Science | Abbreviated Series Title | ||
Series Volume | 7521 | Series Issue | Edition | ||
ISSN | ISBN | 978-3-642-32942-5 | Medium | ||
Area | Expedition | Conference | |||
Notes | Approved | yes | |||
Call Number | Sapienza @ mari @ Mari2012 | Serial | 99 | ||
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Author | Mari, Federico; Melatti, Igor; Salvo, Ivano; Tronci, Enrico | ||||
Title | Synthesizing Control Software from Boolean Relations | Type | Journal Article | ||
Year | 2012 | Publication | International Journal on Advances in Software | Abbreviated Journal | Intern. Journal on Advances in SW |
Volume | vol. 5, nr 3&4 | Issue | Pages | 212-223 | |
Keywords | Control Software Synthesis; Embedded Systems; Model Checking | ||||
Abstract | Many software as well digital hardware automatic
synthesis methods define the set of implementations meeting the given system specifications with a boolean relation K. In such a context a fundamental step in the software (hardware) synthesis process is finding effective solutions to the functional equation defined by K. This entails finding a (set of) boolean function(s) F (typically represented using OBDDs, Ordered Binary Decision Diagrams) such that: 1) for all x for which K is satisfiable, K(x, F(x)) = 1 holds; 2) the implementation of F is efficient with respect to given implementation parameters such as code size or execution time. While this problem has been widely studied in digital hardware synthesis, little has been done in a software synthesis context. Unfortunately, the approaches developed for hardware synthesis cannot be directly used in a software context. This motivates investigation of effective methods to solve the above problem when F has to be implemented with software. In this paper, we present an algorithm that, from an OBDD representation for K, generates a C code implementation for F that has the same size as the OBDD for F and a worst case execution time linear in nr, being n = |x| the number of input arguments for functions in F and r the number of functions in F. Moreover, a formal proof of the proposed algorithm correctness is also shown. Finally, we present experimental results showing effectiveness of the proposed algorithm. |
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Publisher | IARIA | Place of Publication | Editor ![]() |
Luigi Lavazza | |
Language | Summary Language | Original Title | |||
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Series Volume | Series Issue | Edition | |||
ISSN | 1942-2628 | ISBN | Medium | ||
Area | Expedition | Conference | |||
Notes | Approved | yes | |||
Call Number | Sapienza @ melatti @ | Serial | 108 | ||
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Author | Mari, Federico; Melatti, Igor; Salvo, Ivano; Tronci, Enrico | ||||
Title | Linear Constraints and Guarded Predicates as a Modeling Language for Discrete Time Hybrid Systems | Type | Journal Article | ||
Year | 2013 | Publication | International Journal on Advances in Software | Abbreviated Journal | Intern. Journal on Advances in SW |
Volume | vol. 6, nr 1&2 | Issue | Pages | 155-169 | |
Keywords | Model-based software design; Linear predicates; Hybrid systems | ||||
Abstract | Model based design is particularly appealing in
software based control systems (e.g., embedded software) design, since in such a case system level specifications are much easier to define than the control software behavior itself. In turn, model based design of embedded systems requires modeling both continuous subsystems (typically, the plant) as well as discrete subsystems (the controller). This is typically done using hybrid systems. Mixed Integer Linear Programming (MILP) based abstraction techniques have been successfully applied to automatically synthesize correct-by-construction control software for discrete time linear hybrid systems, where plant dynamics is modeled as a linear predicate over state, input, and next state variables. Unfortunately, MILP solvers require such linear predicates to be conjunctions of linear constraints, which is not a natural way of modeling hybrid systems. In this paper we show that, under the hypothesis that each variable ranges over a bounded interval, any linear predicate built upon conjunction and disjunction of linear constraints can be automatically translated into an equivalent conjunctive predicate. Since variable bounds play a key role in this translation, our algorithm includes a procedure to compute all implicit variable bounds of the given linear predicate. Furthermore, we show that a particular form of linear predicates, namely guarded predicates, are a natural and powerful language to succinctly model discrete time linear hybrid systems dynamics. Finally, we experimentally show the feasibility of our approach on an important and challenging case study taken from the literature, namely the multi-input Buck DC-DC Converter. As an example, the guarded predicate that models (with 57 constraints) a 6-inputs Buck DC-DC Converter is translated in a conjunctive predicate (with 102 linear constraints) in about 40 minutes. |
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Publisher | IARIA | Place of Publication | Editor ![]() |
Luigi Lavazza | |
Language | Summary Language | Original Title | |||
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Series Volume | Series Issue | Edition | |||
ISSN | 1942-2628 | ISBN | Medium | ||
Area | Expedition | Conference | |||
Notes | Approved | yes | |||
Call Number | Sapienza @ melatti @ | Serial | 115 | ||
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Author | Mari, Federico; Melatti, Igor; Salvo, Ivano; Tronci, Enrico; Alvisi, Lorenzo; Clement, Allen; Li, Harry | ||||
Title | Model Checking Coalition Nash Equilibria in MAD Distributed Systems | Type | Conference Article | ||
Year | 2009 | Publication | Stabilization, Safety, and Security of Distributed Systems, 11th International Symposium, SSS 2009, Lyon, France, November 3-6, 2009. Proceedings | Abbreviated Journal | |
Volume | Issue | Pages | 531-546 | ||
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Abstract | We present two OBDD based model checking algorithms for the verification of Nash equilibria in finite state mechanisms modeling Multiple Administrative Domains (MAD) distributed systems with possibly colluding agents (coalitions) and with possibly faulty or malicious nodes (Byzantine agents). Given a finite state mechanism, a proposed protocol for each agent and the maximum sizes f for Byzantine agents and q for agents collusions, our model checkers return Pass if the proposed protocol is an ε-f-q-Nash equilibrium, i.e. no coalition of size up to q may have an interest greater than ε in deviating from the proposed protocol when up to f Byzantine agents are present, Fail otherwise. We implemented our model checking algorithms within the NuSMV model checker: the first one explicitly checks equilibria for each coalition, while the second represents symbolically all coalitions. We present experimental results showing their effectiveness for moderate size mechanisms. For example, we can verify coalition Nash equilibria for mechanisms which corresponding normal form games would have more than $5 \times 10^21$ entries. Moreover, we compare the two approaches, and the explicit algorithm turns out to outperform the symbolic one. To the best of our knowledge, no model checking algorithm for verification of Nash equilibria of mechanisms with coalitions has been previously published. | ||||
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Publisher | Springer | Place of Publication | Editor ![]() |
Guerraoui, R.; Petit, F. | |
Language | Summary Language | Original Title | |||
Series Editor | Series Title | Lecture Notes in Computer Science | Abbreviated Series Title | ||
Series Volume | 5873 | Series Issue | Edition | ||
ISSN | ISBN | Medium | |||
Area | Expedition | Conference | |||
Notes | Approved | yes | |||
Call Number | Sapienza @ mari @ sss09 | Serial | 19 | ||
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Author | Mari, Federico; Melatti, Igor; Salvo, Ivano; Tronci, Enrico; Alvisi, Lorenzo; Clement, Allen; Li, Harry | ||||
Title | Model Checking Nash Equilibria in MAD Distributed Systems | Type | Conference Article | ||
Year | 2008 | Publication | FMCAD '08: Proceedings of the 2008 International Conference on Formal Methods in Computer-Aided Design | Abbreviated Journal | |
Volume | Issue | Pages | 1-8 | ||
Keywords | Model Checking, MAD Distributed System, Nash Equilibrium | ||||
Abstract | We present a symbolic model checking algorithm for verification of Nash equilibria in finite state mechanisms modeling Multiple Administrative Domains (MAD) distributed systems. Given a finite state mechanism, a proposed protocol for each agent and an indifference threshold for rewards, our model checker returns PASS if the proposed protocol is a Nash equilibrium (up to the given indifference threshold) for the given mechanism, FAIL otherwise. We implemented our model checking algorithm inside the NuSMV model checker and present experimental results showing its effectiveness for moderate size mechanisms. For example, we can handle mechanisms which corresponding normal form games would have more than $10^20$ entries. To the best of our knowledge, no model checking algorithm for verification of mechanism Nash equilibria has been previously published. | ||||
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Publisher | IEEE Press | Place of Publication | Piscataway, NJ, USA | Editor ![]() |
Cimatti, A.; Jones, R. |
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ISSN | 978-1-4244-2735-2 | ISBN | Medium | ||
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Notes | Approved | yes | |||
Call Number | Sapienza @ mari @ MarMelSalTroAlvCle08 | Serial | 93 | ||
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Author | Alimguzhin, Vadim; Mari, Federico; Melatti, Igor; Salvo, Ivano; Tronci, Enrico | ||||
Title | On Model Based Synthesis of Embedded Control Software | Type | Conference Article | ||
Year | 2012 | Publication | Proceedings of the 12th International Conference on Embedded Software, EMSOFT 2012, part of the Eighth Embedded Systems Week, ESWeek 2012, Tampere, Finland, October 7-12, 2012 | Abbreviated Journal | |
Volume | Issue | Pages | 227-236 | ||
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Publisher | ACM | Place of Publication | Editor ![]() |
Ahmed Jerraya and Luca P. Carloni and Florence Maraninchi and John Regehr | |
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ISSN | ISBN | 978-1-4503-1425-1 | Medium | ||
Area | Expedition | Conference | |||
Notes | Techreport version can be found at arxiv.org | Approved | yes | ||
Call Number | Sapienza @ mari @ emsoft12 | Serial | 97 | ||
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Author | Tronci, E.; Mancini, T.; Salvo, I.; Mari, F.; Melatti, I.; Massini, A.; Sinisi, S.; Davì, F.; Dierkes, T.; Ehrig, R.; Röblitz, S.; Leeners, B.; Krüger, T.; Egli, M.; Ille, F. | ||||
Title | Patient-Specific Models from Inter-Patient Biological Models and Clinical Records | Type | Conference Article | ||
Year | 2014 | Publication | Formal Methods in Computer-Aided Design (FMCAD) | Abbreviated Journal | |
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Notes | Approved | no | |||
Call Number | Sapienza @ mari @ | Serial | 120 | ||
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Author | Mari, Federico; Melatti, Igor; Salvo, Ivano; Tronci, Enrico | ||||
Title | Quantized Feedback Control Software Synthesis from System Level Formal Specifications for Buck DC/DC Converters | Type | Report | ||
Year | 2011 | Publication | Abbreviated Journal | ||
Volume | abs/1105.5640 | Issue | Pages | ||
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Abstract | Many Embedded Systems are indeed Software Based Control Systems (SBCSs), that is control systems whose controller consists of control software running on a microcontroller device. This motivates investigation on Formal Model Based Design approaches for automatic synthesis of SBCS control software. In previous works we presented an algorithm, along with a tool QKS implementing it, that from a formal model (as a Discrete Time Linear Hybrid System, DTLHS) of the controlled system (plant), implementation specifications (that is, number of bits in the Analog-to-Digital, AD, conversion) and System Level Formal Specifications (that is, safety and liveness requirements for the closed loop system) returns correct-by-construction control software that has a Worst Case Execution Time (WCET) linear in the number of AD bits and meets the given specifications. In this technical report we present full experimental results on using it to synthesize control software for two versions of buck DC-DC converters (single-input and multi-input), a widely used mixed-mode analog circuit. | ||||
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Publisher | CoRR, Technical Report | Place of Publication | Editor ![]() |
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Notes | Approved | yes | |||
Call Number | Sapienza @ mari @ | Serial | 106 | ||
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Author | Mari, Federico; Melatti, Igor; Salvo, Ivano; Tronci, Enrico | ||||
Title | Model Based Synthesis of Control Software from System Level Formal Specifications | Type | Journal Article | ||
Year | 2014 | Publication | ACM TRANSACTIONS ON SOFTWARE ENGINEERING AND METHODOLOGY | Abbreviated Journal | ACM TRANSACTIONS ON SOFTWARE ENGINEERING AND METHODOLOGY |
Volume | 23 | Issue | 1 | Pages | Article 6 |
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Publisher | ACM | Place of Publication | Editor ![]() |
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Series Volume | Series Issue | Edition | |||
ISSN | 1049-331X | ISBN | Medium | ||
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Notes | Approved | no | |||
Call Number | Sapienza @ melatti @ | Serial | 110 | ||
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