Offshore wind turbine blade installation: Development of a motion-compensated Stewart platform for blade installation with a floating vessel

With the increasing water depths of the new offshore wind farms, the challenging soil conditions, the availability of assets, and other factors, jack-up installation vessels may no longer be suitable to complete the installation scope of work for the new wind farms. Therefore, installation methods and techniques using floating vessels must be...

Experimental low frequency mooring analysis of a floating offshore wind turbine

Previous research into floating offshore wind turbines consistently shows some manner of discrepancy between numerical and experimental simulations when it comes to low frequency forces and motions. A part of solving this issue is the generation of accurate data for the calibration and validation of the numerical models, needed because of the...

Modeling of a System Camera to find the Effect of Marker Design on Motion Tracking Accuracy in Six Degrees of Freedom

Patient motion during an MR scan is still a problem in the medical field. It results in artefacts and reduces image quality which can lead to wrong patient outcomes. A patient moves due to the long scanning times, discomfort, and restlessness. Motion correction techniques are developed to prevent or compensate for the movements. Prospective...

Magnetic field SLAM: using an inertial human motion suit and reduced rank Gaussian process regression

Indoor localisation is a growing field of interest in recent studies. While GPS (global positioning system) is a standard for outdoor localisation, no such solution exists for indoor applications. The literature provides several methods to obtain the location of indoor systems, often using optical sensors. A small number of recent studies use...

Kinematics analysis of an end-effector-based orthosis for the lower limb allowing for adduction and flexion

Rehabilitation robotics is a rapidly growing field in the engineering industry. Due to the high repeatability of motion, high therapy costs, and lack of proper quantitative assessment of patient status and progress, rehabilitation centers could benefit from the introduction of robotics. One such device already commercially available is the...

Three-dimensional ultrasound: Enabling volume measurements with a two-dimensional ultrasound probe

This work investigates low-cost three-dimensional (3D) ultrasound reconstruction from a two-dimensional (2D) hand-held probe with motion tracking. The best available motion tracking is an optical tracking system, which is expensive and requires external tracking hardware. Here, a low-cost manoeuvrable motion tracker, an inertial measurement unit...

Inertial sensors—applications and challenges in a nutshell

This editorial provides a concise introduction to the methods and applications of inertial sensors. We briefly describe the main characteristics of inertial sensors and highlight the broad range of applications as well as the methodological challenges. Finally, for the reader’s guidance, we give a succinct overview of the papers included in...

Validation of Motion Tracking Software for Evaluation of Surgical Performance in Laparoscopic Cholecystectomy

Motion tracking software for assessing laparoscopic surgical proficiency has been proven to be effective in differentiating between expert and novice performances. However, with several indices that can be generated from the software, there is no set threshold that can be used to benchmark performances. The aim of this study was to identify...

The Virtual Rubber Hand Illusion: Moving in the Right Direction?

The Rubber Hand Illusion is an illusion in which<br/>visual cues of stimulation on a fake hand are combined with<br/>synchronous tactile cues on a participant’s hand, which can<br/>induce a sense of bodily ownership of the fake hand. This<br/>technique does not facilitate synchronous movement of the<br/>hands, and asynchronous stimulation or...

A software-based tool for video motion tracking in the surgical skills assessment landscape

Background: The use of motion tracking has been proved to provide an objective assessment in surgical skills training. Current systems, however, require the use of additional equipment or specialised laparoscopic instruments and cameras to extract the data. The aim of this study was to determine the possibility of using a software-based...

Motion tracking in field sports using GPS and IMU

Injuries are a sportsman’s worst nightmare: They withhold players from playing, they weaken teams and they force clubs to buy a bench-full of substitutes. On top of that, injuries can cause an awful lot of pain. Regulating match and training intensity can drastically decrease the risk of getting injured. Furthermore, it can optimally prepare...

Advances in tomographic PIV

This research deals with advanced developments in 3D particle image velocimetry based on the tomographic PIV technique (Tomo-PIV). The latter is a relatively recent measurement technique introduced by Elsinga et al. in 2005, which is based on the tomographic reconstruction of particle tracers in three-dimensional space from a small number of its...

Motion tracking-enhanced MART for tomographic PIV

A novel technique to increase the accuracy of multiplicative algebraic reconstruction technique (MART) reconstruction from tomographic particle image velocimetry (PIV) recordings at higher seeding density than currently possible is presented. The motion tracking enhancement (MTE) method is based on the combined utilization of images from two or...