Obstacle

About: Obstacle is a research topic. Over the lifetime, 9517 publications have been published within this topic receiving 94760 citations. The topic is also known as: impediment & barrier.

Velocity Obstacle Approaches for Multi-Agent Collision Avoidance

Abstract: This paper presents a critical analysis of some of the most promising approaches to geometric collision avoidance in multi-agent systems namely; the velocity obstacle (VO), reciprocal velocity obstacle (RVO), hybrid-reciprocal velocity obstacle (HRVO) and optimal reciprocal collision avoidance (ORCA) approaches. Each approach is evaluated with respect to increasing agent populations and variable sensing assumptions. An intensive 1000 cycle Monte Carlo analysis is used to assess the performance of the selected algorithms in the presented conditions. The optimal reciprocal collision avoidance (ORCA) method is shown to yield the most scalable computation times and collision likelihood in different testing scenarios. The respective features and limitations of each algorithm are discussed and presented through examples.

Method and device for assisting a driver during reverse travel

Abstract: A method and device prevents damage to a vehicle approaching an obstacle, such as, for example, a loading ramp, while traveling in reverse. When a vehicle, particularly a vehicle train consisting of a towing vehicle and a trailer or semi-trailer, approaches an obstacle in reverse travel, there exists the possibility that the vehicle may impact the obstacle as a result of an erroneous estimation or inappropriate driving maneuver, potentially resulting in damage to the vehicle and/or to the obstacle. This problem occurs with relative frequency, particularly when approaching a loading ramp. In accordance with the invention, the driver of the vehicle is assisted during reverse travel such that damage due to excessive impact is automatically avoided, independently of the driver's actions. A distance sensor is installed on the vehicle, near the tail, which transmits a signal representative of the distance from an obstacle to an electronic control device. The electronic control device evaluates the distance value measured by the distance sensor and adapts the speed of the vehicle during reverse travel in accordance with a predetermined algorithm in such manner that the approach to the obstacle takes place without damage to the vehicle and/or the obstacle. The control device advantageously influences the braking system of the vehicle and, if necessary, the drive engine, in a suitable manner.

Method and Device for Avoiding and/or Reducing the Consequences of Collisions Upon Evasion with Respect to Obstacles

Abstract: A method and a device for assisting a driver of a vehicle to avoid collisions with obstacles are provided, in which method at least one obstacle is detected by way of at least one surroundings sensor, and data of the obstacle are ascertained. On the basis of the data of the obstacle and data of the vehicle, a vehicle deceleration that is favorable for assistance of an evasive operation is ascertained, and the vehicle is correspondingly decelerated.