Experimental study of Stagnation Pressure Reaction Control for mid-calibre non-spinning projectiles

Increased precision of gun-launched ammunition can reduce collateral damage and increase stand-off distance. It can maximize the tactical advantage of each shot and reduce the number of rounds needed to achieve mission success. Worldwide, technology for controlled smart munitions is being researched and demonstrated in various implementations....

DriftLess: Underground Positioning using Bias Compensation for Inertial Sensors combined with UWB

Fatigue crack identification and lifetime prediction for steel bridge deck structures

Fatigue, as the governing degradation mechanism in steel bridge decks, can lead to non-inspectable cracks under the welded intersections of stiffeners to the deck plate. As a result, estimation of the remaining service life and optimization of the maintenance program of steel bridge decks become a great challenge. A comprehensive structural...

Acoustic emission health monitoring of steel bridges

Despite extensive developments in the field of Acoustic Emission (AE) for monitoring fatigue cracks in steel structures, the implementation of AE systems for large-scale bridges is hindered by limitations associated with instrumentation costs and signal processing complexities. This paper sheds light on some of the most important challenges in...

A wireless distributed sensor network with low-cost vibration sensors for structural health monitoring

The amount of infrastructure assets such as bridges, process installations and off-shore wind turbines is increasing, accompanied by a rising need for advanced maintenance strategies to reduce inspection and maintenance costs. These maintenance strategies require reliable maintenance status information. Vibration sensing can supply added value...

Miniature and low cost fiber bragg grating interrogator for structural monitoring in nano-satellites

In this paper we present a newly developed Fiber Optic measurement system, consisting of Fiber Bragg Grating (FBG) sensors and an FBG interrogator. The development of the measuring system is part of the PiezoElectric Assisted Smart Satellite Structure (PEASSS) project, which was initiated at the beginning of 2013 and is financed by the Seventh...

Multidisciplinary health monitoring of a steel bridge deck structure

Fatigue cracks in orthotropic bridge decks are an important cause for the necessary renovation of existing bridges. Parallel utilization of various technologies based on different physical sensing principles can potentially maximize the efficiency of structural health monitoring (SHM) systems for these complex structures. A multidisciplinary SHM...

Structural health monitoring for fatigue life prediction of orthotropic bridge decks

Infrastructure asset owners are more and more confronted with structures reaching the end of their structural life. Structural Health Monitoring (SHM) systems should provide up-to-date information about the actual condition, as well predict the structural life and required maintenance of the assets for more cost effective and reliable operation...

Micro-digital sun sensor: An imaging sensor for space applications

Micro-Digital Sun Sensor is an attitude sensor which senses relative position of micro-satellites to the sun in space. It is composed of a solar cell power supply, a RF communication block and an imaging chip which is called APS+. The APS+ integrates a CMOS Active Pixel Sensor (APS) of 512×512 pixels, a 12 bit Analogue to Digital Converter (ADC)...