A Theory of the Tactical Conflict Prediction of a Pair of Aircraft

1989 ◽  
Vol 42 (3) ◽  
pp. 417-429 ◽  
Author(s):  
Karel Havel ◽  
Jaroslav Husarčík
Keyword(s):  
Mathematical Model ◽  
Collision Avoidance ◽  
Fixed Time ◽  
Flight Operations ◽  
Look Ahead ◽  
Radar Information ◽  
Conflict Prediction

The objective of ground collision avoidance systems (GCAS) is to assure the separation of aircraft during flight operations, GCAS can be divided into tactical and strategic systems. The term tactical implies conflict prediction made after every radar scan and with approximately a one minute look ahead time. The aim of the study is to build up a mathematical model which uses only radar information and predicts potential conflicts within a fixed time, p, which may differ in different areas.

An Automatic Collision Avoidance System Based on LiDAR

2014 ◽  
Vol 644-650 ◽  
pp. 952-956 ◽  
Author(s):  
Hao Yang ◽  
An Qing You ◽  
Wen Wu Pan ◽  
Hai Long Tang
Keyword(s):  
Mathematical Model ◽  
Collision Avoidance ◽  
Point Cloud ◽  
Gps Data ◽  
3D Point Cloud ◽  
The Road ◽  
3D Engine ◽  
Collision Avoidance System

For vehicle-borne LiDAR, a mathematical model is built for the computation and reconstruction of laser point cloud with the scanning data, GPS data and IMU data. 3D point cloud of the road and the scenery on the both sides of the road is obtained. Then according to the trajectory of the vehicle, 3D roaming for the scenery on the both sides of the road is realized using OpenGL 3D engine technology. This technology provides a probably feasible way for anti-collision of vehicles and aircrafts when driven at night, in the heavy fog or flying between the mountains.

The Presentation of Radar Information for Collision Avoidance

1957 ◽  
Vol 10 (3) ◽  
pp. 277-283
Author(s):  
A. L. P. Milwright
Keyword(s):  
Collision Avoidance ◽  
The Other ◽  
Radar Screen ◽  
The Face ◽  
Radar Information

If a navigator wishes to determine the closest passing distance of his ship to any other ship by means of radar, it can be done quite simply by plotting the ranges and bearings of the other vessel's echo. The line joining the plotted positions will indicate the relative course of the other vessel and by extending the relative-course line the closest passing distance can be measured. With the existing method of measuring bearing by means of a mechanical cursor with its attendant possible in-accuracies, it is necessary to plot a number of positions and draw the relative-course line as a mean through the plotted positions. The time taken to establish the nearest approach is therefore comparatively long. If an electronic bearing cursor is used the time to determine the nearest approach can be reduced since the accuracy of the measured bearings will be higher, and fewer measurements required. It may, however, be inconvenient to move from the radar screen to the plotting table and if plotting is done on the face of the PPI or a reflection plotter, the accuracy may be poor, particularly if the nearest approach is determined by extending a relative-course line formed by two plotted positions close together, using a blunt wax pencil.

Uncertainty in Collision Avoidance Manoeuvring

1990 ◽  
Vol 43 (2) ◽  
pp. 238-245 ◽  
Author(s):  
Donald H. Taylor
Keyword(s):  
Mathematical Model ◽  
Probability Theory ◽  
Collision Avoidance ◽  
Simple Mathematical Model ◽  
Model Based

Meeting encounters, in which it is uncertain at what range the give-way ship will manoeuvre, are analysed using a model based on probability theory. Course alteration ranges of both giveway and (if necessary) stand-on ships are closely fitted by a simple mathematical model, which is also used to interpret the efficiency of the Collision Regulations.

scholarly journals A Novel Method for Risk Assessment and Simulation of Collision Avoidance for Vessels based on AIS

Algorithms ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 204 ◽  
Author(s):  
ManhCuong Nguyen ◽  
Shufang Zhang ◽  
Xiaoye Wang
Keyword(s):  
Mathematical Model ◽  
Risk Assessment ◽  
Collision Avoidance ◽  
Warning System ◽  
Automatic Identification ◽  
Identification System ◽  
Novel Method ◽  
Ship Collision ◽  
Collision Avoidance System ◽  
Traffic Detection

The identification of risks associated with collision for vessels is an important element in maritime safety and management. A vessel collision avoidance system is a topic that has been deeply studied, and it is a specialization in navigation technology. The automatic identification system (AIS) has been used to support navigation, route estimation, collision prediction, and abnormal traffic detection. This article examined the main elements of ship collision, developed a mathematical model for the risk assessment, and simulated a collision assessment based on AIS information, thereby providing meaningful recommendations for crew training and a warning system, in conjunction with the AIS on board.

Tactile Spatial Guidance for Collision Avoidance in NextGen Flight Operations

2016 ◽  
Vol 60 (1) ◽  
pp. 303-307 ◽  
Author(s):  
Julie C. Prinet ◽  
Yuzhi Wan ◽  
Nadine Sarter
Keyword(s):  
Collision Avoidance ◽  
Detection Rate ◽  
Spatial Information ◽  
Response Times ◽  
Flight Path ◽  
Single Stage ◽  
Response Accuracy ◽  
Flight Operations ◽  
Tactile Displays ◽  
Aviation Operations

Future aviation operations will require pilots to assume new tasks, such as self-separation. Tactile displays are a promising means of supporting this task. They are well suited for presenting spatial information and offload the heavily taxed visual and auditory channels. This experiment assessed the effectiveness of tactile spatial alerts for notifying pilots of an aircraft intruding on their flight path during Closely Spaced Parallel Approaches. Two alerting strategies (single-stage vs. graded) and two alert types (status vs. command) were compared. 19 pilots had to fly a series of approaches, detect tactile alerts and perform evasive maneuvers. The detection rate for tactile alerts was 100%. Graded and status alerts led to the highest response accuracy (100% and 98%, respectively). Response times were faster for command alerts and during manual flight. These results indicate that tactile displays are effective for conveying spatial information and can help prevent collisions in future aviation operations.

Sign in / Sign up

Export Citation Format

Share Document