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— The papers studies the observability properties of the relative localization of two Autonomous Underwater Vehicles (AUVs) equipped with depth sensors and communication devices with range measurement. The conditions that ensure observability of the linearized model and locally weak observability of the non-linear system are derived. An Extended Kalman(More)
— This paper proposes a multiple robot control algorithm to approach the problem of patrolling an open or closed line. The algorithm is fully decentralized, i.e., no communication occurs between robots or with a central station. Robots behave according only to their sensing and computing capabilities to ensure high scalability and robustness towards robots'(More)
In this paper a new behavior-based approach for the control of autonomous robotic systems is proposed. The so-called null-space-based behavioral (NSB) control differs from the other existing methods in the behavioral coordination, i.e., in the way the outputs of the single elementary behaviors are combined to compose a complex behavior. The proposed(More)
—This paper presents a six-degrees-of-freedom controller for autonomous underwater vehicles. The control algorithm is adaptive in the dynamic parameters that are poorly known and time-varying in the underwater environment. Moreover, the proposed control law adopts quaternions to represent attitude errors, and thus avoids representation singularities that(More)
—In this paper, the experimental validation of a behavior based technique for multirobot systems (MRSs), namely, the Null-Space-based Behavioral (NSB) control, is presented. The NSB strategy, inherited from the singularity-robust task-priority inverse kinematics for industrial manipulators, has been recently proposed for the execution of different(More)