Saab Automobile AB

About: Saab Automobile AB is a based out in . It is known for research contribution in the topics: Radar & Antenna (radio). The organization has 760 authors who have published 890 publications receiving 11811 citations.

SMARTracIn: a concept for spoof resistant tracking of vessels and detection of adverse intentions

Abstract: The aim of maritime surveillance systems is to detect threats early enough to take appropriate actions. We present the results of a study on maritime domain awareness performed during the fall of 2008. We analyze an identified capability gap of worldwide surveillance in the maritime domain, and report from a user workshop addressing the identified gap. We describe a SMARTracIn concept system that integrates information from surveillance systems with background knowledge on normal conditions to help users detect and visualize anomalies in vessel traffic. Land-based systems that cover the coastal waters as well as airborne, space-borne and ships covering open sea are considered. Sensor data are combined with intelligence information from ship reporting systems and databases. We describe how information fusion, anomaly detection and semantic technology can be used to help users achieve more detailed maritime domain awareness. Human operators are a vital part of this system and should be active components in the fusion process. We focus on the problem of detecting anomalous behavior in ocean-going traffic, and a room and door segmentation concept to achieve this. This requires the ability to identify vessels that enter into areas covered by sensors as well as the use of information management systems that allow us to quickly find all relevant information.

Enhanced situational awareness in the maritime domain: an agent-based approach for situation management

Abstract: Maritime Domain Awareness is important for both civilian and military applications. An important part of MDA is detection of unusual vessel activities such as piracy, smuggling, poaching, collisions, etc. Today's interconnected sensorsystems provide us with huge amounts of information over large geographical areas which can make the operators reach their cognitive capacity and start to miss important events. We propose and agent-based situation management system that automatically analyse sensor information to detect unusual activity and anomalies. The system combines knowledge-based detection with data-driven anomaly detection. The system is evaluated using information from both radar and AIS sensors.

Arrangement for controlling a hydraulically operated friction disc clutch with diaphragm spring

Abstract: The invention relates to an arrangement for automatic control of a hydraulically operated friction disc clutch (60) with diaphragm spring (64) The hydraulic operating unit comprises a hydraulic cylinder which, by acting on the diaphragm spring (64), disengages the friction disc clutch In order to obtain a hydraulic operating unit in which the regulating pressure is proportional to the disengagement degree of the clutch, the hydraulic cylinder comprises a proportionality-forming spring (13) which acts against the hydraulic cylinder piston (4) during the final part of the disengagement stroke of the piston In a system with master cylinder (1) and slave cylinder (61), where the slave cylinder acts on the diaphragm spring for disengagement of the friction disc clutch, the master cylinder is also provided with a pressure supply, compensating for wear of the discs, via a hydraulic channel (7) which is closed off at a predetermined regulating pressure level The invention permits a simplified system solution for an automated diaphragm spring clutch in a vehicle, where the clutch does not require any positional sensors, but the disengagement degree is given by the hydraulic regulating pressure

Energy absorbent bumper for motor vehicles

Abstract: A motor vehicle bumper for energy absorption. A support part of the bumper is supportable on the vehicle and is generally U-shaped with horizontally extending arms. A cover supported on the support includes respective wall sections that extend in from the top and bottom of the cover and cooperate with vertically outwardly extending flanges on the legs of the U. The wall sections of the cover are simply locked to the flanges of the support. A body of energy absorbing material is disposed in the cover and in the support and is pressed against the wall sections of the cover upon deformation of the cover by application of more than a predetermined force to press the energy absorbing material against the cover wall sections to prevent those wall sections from separating from the flanges of the legs of the U-shaped support in the event of collision or application of more than a predetermined force to the cover of the bumper.