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The article proposes a feedback control system for path following in presence of obstacles that is an extension of previous work and is made of two components: (i) a sensor-based, real-time model that generates and periodically updates the path on-line in order to avoid both known and unforeseen obstacles, and (ii) a feedback-control model that is capable of driving a unicycle vehicle along the collision...
This paper shows the capability of our environmental testbed to validate novel cooperative control algorithms that rely on measurements from the environment. Through the design of our mounting plates, the testbed can accommodate multiple environmental sensors as well as different configurations of robot accessories. Also, our environmental sensor suite provides the ability to integrate a variety of...
This paper presents fault detection and isolation (FDI) of dead reckoning and an external sensor (laser range sensor, LRS) on mobile robots in a multi-robot team. Each robot in the team monitors states (fault or fault-free) of the in-vehicle sensors by comparing velocity estimates obtained using its own two velocity providers: dead reckoning and laser-based scan matching. When the robot detects a...
Classical motion planners and most of navigation routines discard dynamics of the system and therefore fail in some special conditions. If a robot is moving towards an obstacle with a high acceleration and speed, collision is inevitable because the obstacles are taken into account only either once they are in range, or a physical collision is reported by detection routines. In this paper, we have...
This paper present the theoretical development of a complete navigation problem of a non-holonomic mobile robot by using sonar sensors. To solve this problem, a new method to compute a fuzzy perception of the environment is presented, dealing with the uncertainties and imprecision from the sensory system and taking into account nonholonomic constraints of the robot. Fuzzy perception, fuzzy controller...
The paper describes the design of the fuzzy control system for an autonomous robot car which operates in unknown, unpredictable, and dynamic environment. The fuzzy control system must provide the fusing of data from multiple sensors and must ensure navigation of the autonomous robot car. Both - an obstacle avoidance control strategy and a target tracking control strategy - are used for the control...
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