TY - JOUR T1 - Time optimal swing-up of the planar pendulum JF - 46th IEEE Conference on Decision and Control (2007) 5389 - 5394 Y1 - 2007 A1 - Mireille E. Broucke A1 - Paolo Mason A1 - Benedetto Piccoli AB - This paper presents qualitative and numerical results on the global structure of the time optimal trajectories of the planar pendulum on a cart. UR - http://hdl.handle.net/1963/1867 U1 - 2355 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Classification of stable time-optimal controls on 2-manifolds JF - J. Math. Sci. 135 (2006) 3109-3124 Y1 - 2006 A1 - Ugo Boscain A1 - Igor Nikolaev A1 - Benedetto Piccoli UR - http://hdl.handle.net/1963/2196 U1 - 2048 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Hybrid necessary principle JF - SIAM J. Control Optim. 43 (2005) 1867-1887 Y1 - 2005 A1 - Mauro Garavello A1 - Benedetto Piccoli AB - We consider a hybrid control system and general optimal control problems for this system. We suppose that the switching strategy imposes restrictions on control sets and we provide necessary conditions for an optimal hybrid trajectory, stating a hybrid necessary principle (HNP). Our result generalizes various necessary principles available in the literature. PB - SIAM UR - http://hdl.handle.net/1963/1641 N1 - Proceedings of IFAC Conference on Analysis and Design of Hybrid Systems, Saint Malo, France U1 - 2477 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - CHAP T1 - A short introduction to optimal control T2 - Contrôle non linéaire et applications: Cours donnés à l\\\'école d\\\'été du Cimpa de l\\\'Université de Tlemcen / Sari Tewfit [ed.]. - Paris: Hermann, 2005 Y1 - 2005 A1 - Ugo Boscain A1 - Benedetto Piccoli JF - Contrôle non linéaire et applications: Cours donnés à l\\\'école d\\\'été du Cimpa de l\\\'Université de Tlemcen / Sari Tewfit [ed.]. - Paris: Hermann, 2005 SN - 2 7056 6511 0 UR - http://hdl.handle.net/1963/2257 U1 - 1990 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Traffic flow on a road network JF - SIAM J. Math. Anal. 36 (2005) 1862-1886 Y1 - 2005 A1 - Giuseppe Maria Coclite A1 - Benedetto Piccoli A1 - Mauro Garavello AB - This paper is concerned with a fluidodynamic model for traffic flow. More precisely, we consider a single conservation law, deduced from conservation of the number of cars,\\ndefined on a road network that is a collection of roads with junctions. The evolution problem is underdetermined at junctions, hence we choose to have some fixed rules for the distribution of traffic plus an optimization criteria for the flux. We prove existence, uniqueness and stability of solutions to the Cauchy problem. Our method is based on wave front tracking approach, see [6], and works also for boundary data and time dependent coefficients of traffic distribution at junctions, so including traffic lights. PB - SISSA Library UR - http://hdl.handle.net/1963/1584 U1 - 2534 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Hybrid optimal control: case study of a car with gears JF - Int. J. Control 76 (2003) 1272-1284 Y1 - 2003 A1 - Ciro D'Apice A1 - Mauro Garavello A1 - Rosanna Manzo A1 - Benedetto Piccoli AB - The purpose of this paper is to show the use of some analytical tools for hybrid optimal control. We illustrate both the hybrid maximum principle and the hybrid necessary principle at work on a simple example of a car with gears. The model is sufficiently rich to generate non-trivial optimization problems and the obtained results match with intuition. Finally, computer simulations confirm the theoretical analysis. PB - Taylor and Francis UR - http://hdl.handle.net/1963/3022 U1 - 1311 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Admissible Riemann solvers for genuinely nonlinear P-systems of mixed type JF - J. Differ. Equations, 2002, 180, 395 Y1 - 2002 A1 - Jean-Marc Mercier A1 - Benedetto Piccoli PB - SISSA Library UR - http://hdl.handle.net/1963/1491 U1 - 2672 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - On the reachability of quantized control systems JF - IEEE Trans. Automat. Contr. 47 (2002) 546-563 Y1 - 2002 A1 - Antonio Bicchi A1 - Alessia Marigo A1 - Benedetto Piccoli AB - In this paper, we study control systems whose input sets are quantized, i.e., finite or regularly distributed on a mesh. We specifically focus on problems relating to the structure of the reachable set of such systems, which may turn out to be either dense or discrete. We report results on the reachable set of linear quantized systems, and on a particular but interesting class of nonlinear systems, i.e., nonholonomic chained-form systems. For such systems, we provide a complete characterization of the reachable set, and, in case the set is discrete, a computable method to completely and succinctly describe its structure. Implications and open problems in the analysis and synthesis of quantized control systems are addressed. PB - SISSA Library UR - http://hdl.handle.net/1963/1501 U1 - 2662 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Controllability for discrete systems with a finite control set JF - Math. Control Signals Systems 14 (2001) 173-193 Y1 - 2001 A1 - Yacine Chitour A1 - Benedetto Piccoli PB - Springer UR - http://hdl.handle.net/1963/3114 U1 - 1219 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Extremal synthesis for generic planar systems JF - J. Dynam. Control Systems, 2001, 7, 209 Y1 - 2001 A1 - Ugo Boscain A1 - Benedetto Piccoli PB - SISSA Library UR - http://hdl.handle.net/1963/1503 U1 - 2660 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Global continuous Riemann solver for nonlinear elasticity JF - Arch. Ration. Mech. An., 2001, 156, 89 Y1 - 2001 A1 - Jean-Marc Mercier A1 - Benedetto Piccoli PB - SISSA Library UR - http://hdl.handle.net/1963/1493 U1 - 2670 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Morse properties for the minimum time function on 2-D manifolds JF - J. Dynam. Control Systems 7 (2001), no. 3, 385--423 Y1 - 2001 A1 - Ugo Boscain A1 - Benedetto Piccoli PB - SISSA Library UR - http://hdl.handle.net/1963/1541 U1 - 2622 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Uniqueness of classical and nonclassical solutions for nonlinear hyperbolic systems JF - J. Differential Equations 172 (2001) 59-82 Y1 - 2001 A1 - Paolo Baiti A1 - Philippe G. LeFloch A1 - Benedetto Piccoli PB - Elsevier UR - http://hdl.handle.net/1963/3113 U1 - 1220 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Abnormal extremals for minimum time on the plane Y1 - 2000 A1 - Ugo Boscain A1 - Benedetto Piccoli PB - SISSA Library UR - http://hdl.handle.net/1963/1508 U1 - 2655 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Quantized control systems and discrete nonholonomy JF - Lagrangian and Hamiltonian Methods for Nonlinear Control : a proc. volume from the IFAC Workshop. Princeton, New Jersey, 16-18 March 2000 / ed. by N.E. Leonard, R. Ortega. - Oxford : Pergamon, 2000 Y1 - 2000 A1 - Alessia Marigo A1 - Benedetto Piccoli A1 - Antonio Bicchi PB - Elsevier SN - 0-08-043658-7 UR - http://hdl.handle.net/1963/1502 U1 - 2661 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - CHAP T1 - Reachability Analysis for a Class of Quantized Control Systems T2 - Proc. 39th IEEE Int. Conf. on Decision and Control 4 (2000) 3963-3968 Y1 - 2000 A1 - Alessia Marigo A1 - Benedetto Piccoli A1 - Antonio Bicchi AB - We study control systems whose input sets are quantized. We specifically focus on problems relating to the structure of the reachable set of such systems, which may turn out to be either dense or discrete. We report on some results on the reachable set of linear quantized systems, and study in detail an interesting class of nonlinear systems, forming the discrete counterpart of driftless nonholonomic continuous systems. For such systems, we provide a complete characterization of the reachable set, and, in the case the set is discrete, a computable method to describe its lattice structure. JF - Proc. 39th IEEE Int. Conf. on Decision and Control 4 (2000) 3963-3968 PB - IEEE UR - http://hdl.handle.net/1963/3518 U1 - 746 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Regular Synthesis and Sufficiency Conditions for Optimality JF - SIAM J. Control Optim. 39 (2000) 359-410 Y1 - 2000 A1 - Benedetto Piccoli A1 - Hector J. Sussmann AB - We propose a definition of \\\"regular synthesis\\\" that is more general than those suggested by other authors such as Boltyanskii and Brunovsky, and an even more general notion of \\\"regular presynthesis.\\\" We give a complete proof of the corresponding sufficiency theorem, a slightly weaker version of which had been stated in an earlier article, with only a rough outline of the proof. We illustrate the strength of our result by showing that the optimal synthesis for the famous Fuller problem satisfies our hypotheses. We also compare our concept of synthesis with the simpler notion of a \\\"family of solutions of the closed-loop equation arising from an optimal feedback law,\\\" and show by means of examples why the latter is inadequate, and why the difficulty cannot be resolved byusing other concepts of solution--such as Filippov solutions, or the limits of sample-and-hold solutions recently proposed as feedback solutions by Clarke, Ledyaev, Subbotin and Sontag -for equations with a non-Lipschitz and possibly discontinuous right-hand side. PB - SIAM UR - http://hdl.handle.net/1963/3213 U1 - 1088 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - BOOK T1 - Well-posedness of the Cauchy problem for n x n systems of conservation laws T2 - Mem. Amer. Math. Soc. 146 (2000), no. 694, 134 p. Y1 - 2000 A1 - Alberto Bressan A1 - Graziano Crasta A1 - Benedetto Piccoli JF - Mem. Amer. Math. Soc. 146 (2000), no. 694, 134 p. PB - American Mathematical Society UR - http://hdl.handle.net/1963/3495 N1 - Chapter 1 and 2 U1 - 769 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Nonclassical Shocks and the Cauchy Problem for Nonconvex Conservation Laws JF - J. Differential Equations 151 (1999) 345-372 Y1 - 1999 A1 - Debora Amadori A1 - Paolo Baiti A1 - Philippe G. LeFloch A1 - Benedetto Piccoli AB - The Riemann problem for a conservation law with a nonconvex (cubic) flux can be solved in a class of admissible nonclassical solutions that may violate the Oleinik entropy condition but satisfy a single entropy inequality and a kinetic relation. We use such a nonclassical Riemann solver in a front tracking algorithm, and prove that the approximate solutions remain bounded in the total variation norm. The nonclassical shocks induce an increase of the total variation and, therefore, the classical measure of total variation must be modified accordingly. We prove that the front tracking scheme converges strongly to a weak solution satisfying the entropy inequality. PB - Elsevier UR - http://hdl.handle.net/1963/3312 U1 - 1018 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Projection singularities of extremals for planar systems Y1 - 1999 A1 - Ugo Boscain A1 - Benedetto Piccoli PB - SISSA Library UR - http://hdl.handle.net/1963/1304 U1 - 3151 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - A generic classification of time-optimal planar stabilizing feedbacks JF - SIAM J. Control Optim. 36 (1998) 12-32 Y1 - 1998 A1 - Alberto Bressan A1 - Benedetto Piccoli AB - Consider the problem of stabilization at the origin in minimum time for a planar control system affine with respect to the control. For a family of generic vector fields, a topological equivalence relation on the corresponding time-optimal feedback synthesis was introduced in a previous paper [Dynamics of Continuous, Discrete and Impulsive Systems, 3 (1997), pp. 335--371]. The set of equivalence classes can be put in a one-to-one correspondence with a discrete family of graphs. This provides a classification of the global structure of generic time-optimal stabilizing feedbacks in the plane, analogous to the classification of smooth dynamical systems developed by Peixoto. PB - SISSA Library UR - http://hdl.handle.net/1963/998 U1 - 2858 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Geometric control approach to synthesis theory JF - Rend. Sem. Mat. Univ. Politec. Torino 56 (1998), no. 4, 53-68 (2001) Y1 - 1998 A1 - Ugo Boscain A1 - Benedetto Piccoli PB - SISSA Library UR - http://hdl.handle.net/1963/1277 U1 - 3178 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Infinite time regular synthesis JF - ESAIM: COCV 3 (1998) 381-405 Y1 - 1998 A1 - Benedetto Piccoli AB - In this paper we provide a new sufficiency theorem for regular syntheses. The concept of regular synthesis is discussed in [12], where a sufficiency theorem for finite time syntheses is proved. There are interesting examples of optimal syntheses that are very regular, but whose trajectories have time domains not necessarily bounded. The regularity assumptions of the main theorem in [12] are verified by every piecewise smooth feedback control generating extremal trajectories that reach the target in finite time with a finite number of switchings. In the case of this paper the situation is even more complicate, since we admit both trajectories with finite and infinite time. We use weak differentiability assumptions on the synthesis and weak continuity assumptions on the associated value function. PB - EDP Sciences UR - http://hdl.handle.net/1963/3517 U1 - 747 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Structural stability for time-optimal planar sytheses JF - Dynam. Contin. Discrete Impuls. Systems 3 (1997), no. 3, 335--371 Y1 - 1997 A1 - Alberto Bressan A1 - Benedetto Piccoli PB - SISSA Library UR - http://hdl.handle.net/1963/997 U1 - 2859 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Viscosity solutions and uniquenessfor systems of inhomogeneous balance laws JF - Discrete Contin. Dynam. Systems 3 (1997), no. 4, 477--5 Y1 - 1997 A1 - Graziano Crasta A1 - Benedetto Piccoli PB - SISSA Library UR - http://hdl.handle.net/1963/969 U1 - 3485 U2 - Mathematics U3 - Functional Analysis and Applications ER - TY - JOUR T1 - Some control problems for the pendulum JF - Proceedings of the 34th IEEE Conference on Decision and Control 4 (1995) 3313-3318 Y1 - 1995 A1 - Benedetto Piccoli AB - The aim of this paper is to illustrate some geometric techniques for the study of nonlinear systems. The pendulum on one hand is good for its simplicity, on the other it presents many of the difficulties one can encounter treating nonlinear systems. PB - IEEE UR - http://hdl.handle.net/1963/982 U1 - 2874 U2 - Mathematics U3 - Functional Analysis and Applications ER -