Collision avoidance

About: Collision avoidance is a research topic. Over the lifetime, 8014 publications have been published within this topic receiving 111414 citations.

Equity-Oriented Aircraft Collision Avoidance Model

Abstract: The continuing increase in air travel demand combined with the saturation of air traffic networks lead to recurrent congestion episodes. Among the many elements responsible for the escalation of air traffic management costs, we focus particularly on the impact of conflict-resolution strategies that arise in congested networks. In air traffic control, a conflict occurs when two or more aircraft fly too close to one another. While many automated conflict-resolution methods have been proposed, most of them cannot be integrated without a profound revision of traffic control procedures as they lack interaction with air traffic controllers (ATCs). Recently, subliminal speed control has been shown to be a promising approach to reducing the impact of air conflicts onto ATCs' workload and potentially improve airspace capacity. From the perspective of airlines however, little has been done to quantify the impact of conflict-resolution strategies onto direct operating costs. We address this gap by introducing an innovative formulation for the aircraft collision avoidance problem, which integrates the economic profile of flights and promotes equitable solutions. We present a goal programming-based model designed to minimize the deviation from fair solutions during the resolution of potential conflicts. The performance of the model is evaluated using a fuel-equivalent conflict-resolution scheme, hence offering a sustainable framework to efficiently and equitably resolve air conflicts.

A Marine Traffic Flow and Collision Avoidance Computer Simulation

Abstract: In a previous paper a model was outlined for an encounter between two vessels using the ‘range to domain over range rate’ (RDRR) criterion. This paper shows how the model has been developed to simulate traffic flow and collision avoidance through the main south-west bound lane of the Dover Strait traffic separation scheme. B. A. Colley and C. T. Stockel are at Plymouth Polytechnic, R. G. Curtis with the Department of Trade and Industry. The paper was presented at an ordinary meeting held in London on 16 November 1983.

A research on AIS-based embedded system for ship collision avoidance

Abstract: This paper uses the data provided by AIS as the sources of information and combines the actual needs for ship collision avoidance perception. Considering the major factor for ship collision impact, a mathematical model of risk evaluation is established for embedded system, and a new design of AIS-based embedded system for ship collision avoidance is proposed. By utilizing an ARM platform, the system has realized many decision support functions, such as intelligent analysis, forewarning prompt, operation suggestion, and data backtracking, displaying and human-computer interaction. The results shows that the system can satisfy the demand of auxiliary decision support for ship collision avoidance operation.

Acoustic Detection of a Fixed-Wing UAV

Abstract: The following paper presents results obtained from experiments conducted to investigate the viability of acoustic sensing to form the basis of a non-cooperative aircraft collision avoidance system. An unmanned aerial vehicle (UAV) fitted with two microphones was flown in the vicinity of another airborne UAV to determine the maximum distance at which the intruding aircraft could be detected. A two-dimensional analytical model to approximate the minimum detection distance required to facilitate an avoidance maneuver for a given spatial configuration is presented. A method to increase detection distances by exploiting the harmonic nature of acoustic signals generated by propeller-driven aircraft is also presented. The method significantly increases the detection distances compared to the commonly used incoherent spectral mean. It was found that a small gasoline-powered UAV could be detected at distances up to 678 m, which is more than double the minimum required to avoid a head-on collision.

Collision avoidance and warning system

Abstract: A collision avoidance and warning system for a helicopter uses a type of emitted energy, for example radio frequency radar, from a transceiver positioned to cover a selected field of view for detecting an object or pedestrian in the vicinity of the helicopter. For helicopters that include a tail rotor assembly, the selected field of view can include a region around the tail rotor assembly so that when the helicopter is running on the ground, an alarm can be issued to persons approaching the tail rotor assembly. When the helicopter is in flight, the collision avoidance and warning system can alert the pilot when a portion of the helicopter outside of the pilot's field of view is in danger of a collision with an object.