| This paper addresses motion planning for a car-like robot moving in a changing planar workspace, i.e. with moving obstacles. First, this motion planning problem is formulated in the state-time space framework. The state-time space of a robot is its state space plus the time dimension. In this framework part of the constraints at hand are translated into static forbidden regions of state-time ...

In this paper, the kinematic model of an autonomous mobile robot system consisting of a chain of steerable cars and passive trailers with axle-to-axle hitching is examined and converted into a multi-input chained form using dynamic state feedback. Some of the methods which have been proposed for steering two-input chained form systems are generalized to multi-chained systems, and then applied t...

In this paper, the concepts of car maneuvers, fuzzy logic control (FLC), and sensor-based behaviors are merged to implement the human-like driving skills by an autonomous car-like mobile robot (CLMR). Four kinds of FLCs, fuzzy wall-following control, fuzzy corner control, fuzzy garage-parking control, and fuzzy parallel-parking control, are synthesized to accomplish the autonomous fuzzy behavio...

Enabling a humanoid robot to drive a car, requires the development of a set of basic primitive actions. These include: walking to the vehicle, manually controlling its commands (e.g., ignition, gas pedal and steering), and moving with the whole-body, to ingress/egress the car. In this paper, we present a sensorbased reactive framework for realizing the central part of the complete task, consist...

this article presents an implementation of a reinforcement learning (rl) method for a snake like robot navigation. the paper starts with developing kinematics and dynamics model of a snake robot in serpentine locomotion followed by performing simulation and finishes with actual experimentation. first, gibbs-appell's method is used to obtain the robot dynamics. the robot is also modeled in simme...

This paper explores a novel mode of mobile manipulation using a car-like robot whose chassis does not extend above the height of its wheels. It transports an object that rests on top of the wheels, so as the robot moves forwards, the object moves forward relative to the robot. The robot must maneuver so that the object stays on top of the robot, or a second robot must be in position to receive ...

We address the problem of planning the motion of a team of mobile robots subject to constraints imposed by sensors and the communication network. Our goal is to develop a decentralized motion control system that leads each robot to their individual goals while keeping connectivity with the neighbors. We present experimental results with a group of car-like robots equipped with omnidirectional v...

Abstract A new control scheme is presented for nonholonomic mobile robots. The main idea of this paper is to consider the natural algebraic structure of the chained form system together with ideas from sliding mode theory while designing the control law. At first, the system model is converted into a single-input time-varying linear system by setting one input as a time-varying function. We des...

We study the motion-planning problem for a car-like robot whose turning radius is bounded from below by one and which is allowed to move in the forward direction only (Dubins car). For two robot configurations σ, σ′, let `(σ, σ′) be the shortest bounded-curvature path from σ to σ′. For d > 0, let `(d) be the supremum of `(σ, σ′), over all pairs (σ, σ′) that are at Euclidean distance d. We study...