Authors:
Andrea Balluchi,
Antonio Bicchi,
Canio Caterini,
Carlo Rossi,
A.L. Sangiovanni-Vincentelli,
Volume: 1, Page 3126 Paper number 1940
Abstract:
The design of a torque tracking controller for a spark ignition engine
is presented. A hybrid model that describes the interacting behavior
of the intake manifold, the engine, the power-train and the catalytic
converter is illustrated. The proposed control is obtained by (i)
decoupling the control problem into two subproblems, and (ii) relaxing
each of the two subproblems to yield problems that can be solved with
classical control techniques. The control law so obtained is mapped
back into the hybrid domain. The quality of the proposed hybrid control
feedback is demonstrated analytically and by simulations on the full-fledged
hybrid model.
Authors:
Toshihiro Yokozawa,
Shinji Hara,
Masato Ishikawa,
Volume: 1, Page 3132 Paper number 1394
Abstract:
This paper proposes an optimal control strategy for a jumping robot
system based on the complementarity modeling. We consider a variable
constraint jumping system consisting of a robot part and an environment(catapult)
part. Such a system can be efficiently modeled as a complementarity
system, in the sense that the discontinuous phenomena such as collision
or separation are handled in a unified framework. First of all, we
give a simple criterion to judge the contact/taking-off condition based
on the complementarity modeling. Secondly, we formulate an optimal
control problem to maximize the peak height in a jump and give a numerical
solution; due to the pre-specified input limitation, the resulting
control is of bang-bang type. Finally the optimal controller is analytically
reconsidered and is implemented as a switching state feedback law.
Authors:
David J. Austin,
Volume: 1, Page 3138 Paper number 9903
Abstract:
A mobile robot moving in an office environment is a hybrid dynamic
system. As the robot becomes constrained by obstacles in the environment,
the dynamics of the system change. Thus, the robot has a number of
distinct states with differing dynamics, corresponding to the different
obstacles in the environment. Discrete switches between the states
occur when the motion of the robot becomes constrained by a new obstacle
or the robot moves away from a previously constraining obstacle. This
paper presents a new method for the identification of a model of this
hybrid dynamic system. Simulated results are given demonstrating the
applicability of this method to identification of hybrid dynamic systems.
A simple controller is implemented indicating the possibilities for
simultaneous identification and control and demonstrating the ease
of controller design in a hybrid dynamic framework.
Authors:
Fabio Balduzzi,
Giuseppe Menga,
Volume: 1, Page 3144 Paper number 9202
Abstract:
In this paper we discuss a novel formulation for the optimal control
of discrete-event dynamic processes representing manufacturing systems
characterized by unreliable machines, finite buffers and time-varying
predictable demands. We approximatively represent the dynamics of the
system with a hybrid model and derive an optimum control strategy for
parts routing and machines scheduling embedded in a two-levels hierarchical
control framework. At the higher level the discrete flows of parts
are described by first-order fluid approximations and an optimum receding
horizon control policy for the machines production rates is obtained
by solving a sequence of linear programming problems. At the lower
level a discrete-event real time dispatcher will be used to track the
solution of the upper level controller as closely as possible.
Authors:
Philippe Manon,
Claire Valentin-Roubinet,
Gérard Gilles,
Volume: 1, Page 3151 Paper number 1873
Abstract:
Chemical products manufacturing must respect sequences which lead them
from an initial phase to a final one. In each phase the dynamic evolutions
in the process are continuous. This paper presents a new method that
minimizes the overall operating time to get the desired products, respecting
the constraints on the continuous variables. It is based on the Pontryagin's
maximum principle extended to discrete controlled hybrid dynamical
systems. It is illustrated on a non linear chemical process.
Authors:
James P. Millan,
Siu D. O'Young,
Volume: 1, Page 3157 Paper number 2138
Abstract:
A Hybrid System model is used to aid the design and verification of
a coordinated control system for two Dynamically Positioned marine
vessels. A simple supervisory controller for the Emergency Shutdown
and Disconnect operation is developed and verified using the automatic
validation software HyTech.
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