Collision avoidance system

About: Collision avoidance system is a research topic. Over the lifetime, 1788 publications have been published within this topic receiving 23667 citations.

Emergency Collision Avoidance by Steering in Critical Situations

Abstract: In this paper, an emergency collision avoidance system is proposed by including not only braking but also steering control actions. The minimum distance to avoid collision is calculated separately for braking and steering based on the relative motion to the surrounding vehicles and the lane information obtained through the vision sensor. For steering avoidance control, an optimal control input is calculated through the model predictive control that satisfies constraints such as safe avoidance region created by surrounding vehicles and capacity of the vehicle actuator. In particular, for avoiding collision by lane changing, the maximum lateral acceleration and the maximum angle of the trajectory are considered. In addition, the abrupt lateral movement in avoidance causes nonlinear characteristics in tires and, thus, tire parameters are estimated through EKF (Extended Kalman Filter) to improve model prediction accuracy. The control intervention time of avoidance maneuvering is determined for braking and steering, respectively. The simulation results demonstrate that the proposed algorithm of integrating AEB (Autonomous Emergency Braking) and AES (Autonomous Emergency Steering) can effectively avoid the collision in critical situations and that the host vehicle can still maintain the safety inside the road boundary.

Model of Optimal Collision Avoidance Manoeuvre on the Basis of Electronic Data Collection

Abstract: This article offers a model of an optimal collision avoidance maneuver which complies with the Collision Avoidance Rules and can be efficiently applied to navigation at sea. The model is based on electronic data collection with a navigation simulator NTPRO-1000 (Transas, Russia). The authors note that the Collision Avoidance Rules themselves to not provide adequate guarantee for avoiding collisions, particularly since 90% of collisions are caused by human errors other than noncompliance with the Rules. The authors report on their model results with rudder angles of 35 degrees and 10 degrees. The research findings confirm that the collision course decisively affects the reliability of general conclusions, as it directly depends on the relative speed of the target observed and on the fact that the algorithm of the maneuver can be developed by dividing the radar screen into sectors. The authors conclude that although the model can offer new approaches in the choice of collision avoidance strategies, a radical decrease of actual collisions will not occur until additional navigation and training for navigating officers becomes the standard.

Development of a collision avoidance system considering the navigation plan

Abstract: In this paper, a collision avoidance system considering the navigation plan is developed. As a standard of judgment for collision avoidance, the degree of collision risky by fuzzy reasoning with input variables of TCPA and DCPA is used, and the navigation plan is made using A* search method. The simulation results show that the collision avoidance system taking into consideration the navigation plan takes safer and smoother actions than the system without taking the navigation plan into consideration.

Intelligent collision avoidance system for tower crane

Abstract: The invention discloses an intelligent collision avoidance system for a tower crane. The intelligent collision avoidance system comprises a background computer and a central controller, wherein the central controller is connected with a display module; the display module is connected with an alarm device; a wireless receiving/transmitting device is respectively connected with the background computer and the central controller; the intelligent collision avoidance system also comprises a tower crane collision avoidance early warning system connected with the wireless receiving/transmitting device; the tower crane collision avoidance early warning system comprises an angle sensor, an amplitude sensor, a height sensor, a weight sensor and an air velocity transducer. The intelligent collision avoidance system has the beneficial effects that an intelligent electronic monitoring system is used, a safety protection system for the angle, amplitude, height, weight, air velocity and operating parameters of the tower crane body is utilized, and the operating safety of the tower crane is comprehensively monitored.

Collision avoidance system for aircraft

Abstract: A collision avoidance system for aircraft in which one aircraft is equipped with an interrogation station having a secondary surveillance radar. .[.Coarse.]. .Iadd.A .Iaddend.distance measurement is effected either by passive or active distance measurement or by both of them. If the detected distance lies within a certain limit, the output power and/or period of the interrogation signal of the secondary surveillance radar of the subject aircraft is altered .[.so as to effect fine distance measurement.].. This system can be applied without increasing interference against the existing secondary surveillance radar system by keeping the output power and period of interrogation signal in a minimum required extent. By the same reason the system can keep the interference at a small extent between proximate aircraft, each mounting this collision avoidance system.