This paper proposes an in situ diagnostic and prognostic (D&P) technology to monitor the health condition of insulated gate bipolar transistors (IGBTs) used EVs with a focus on IGBTs' solder layer fatigue. thermal impedance junction temperature can be as indicators for through-life monitoring (CM) where terminal characteristics are measured devices' internal temperature-sensitive parameters employed sensors estimate temperature. An auxiliary power supply unit, which converted from battery's...

This paper explores and compares the application of three different approaches to data normalization problem in structural health monitoring (SHM), which concerns removal confounding trends induced by varying operational conditions from a measured response that correlates with damage. The methodologies for singling out or creating damage-sensitive features are insensitive environmental influences explored here include cointegration, outlier analysis an approach relying on principal component...

The requirement to increase inspection speeds for non-destructive testing (NDT) of composite aerospace parts is common many manufacturers. prevalence complex curved surfaces in the industry provides motivation use 6 axis robots these inspections. purpose this paper present work undertaken development a KUKA robot manipulator based automated NDT system. A new software solution presented that enables flexible trajectory planning be accomplished often encountered engineering production....

The use of Carbon Fibre Reinforced Plastic (CFRP) composite materials for critical components has significantly surged within the energy and aerospace industry. With this rapid increase in deployment, reliable post-manufacturing Non-Destructive Evaluation (NDE) is verifying mechanical integrity manufactured components. To end, an automated Ultrasonic Testing (UT) NDE process delivered by industrial manipulator was developed, greatly increasing measurement speed, repeatability, locational...

PURPOSE To determine the effect of omission cytarabine (ara-C) from treatment newly diagnosed acute promyelocytic leukemia (APL), which allows administration more anthracycline. PATIENTS AND METHODS Induction consisted all-trans retinoic acid (ATRA) 45 mg/m2 daily until complete remission (CR) and idarubicin 12 for 4 days beginning on day 5 ATRA. Patients in CR received two courses 3 then, 2 years post-CR date, alternated three cycles mercaptopurine, vincristine, methotrexate, prednisone...

Airborne ultrasonic ranging is used in a variety of different engineering applications for which other positional metrology techniques cannot be used, example closed-cell locations, when optical line sight limited, and multipath effects preclude electromagnetic-based wireless systems. Although subject to fundamental physical limitations, e.g., because the temperature dependence acoustic velocity air, these often provide cost-effective solution mobile robotics, structural inspection,...

Abstract Tessellated surfaces generated from point clouds typically show inaccurate and jagged boundaries. This can lead to tolerance errors problems such as machine judder if the model is used for ongoing manufacturing applications. paper introduces a novel boundary detection algorithm spatial FFT-based filtering approach, which together allow direct generation of low noise tessellated cloud data, are not based on pre-defined threshold values. Existing techniques optimized detect points...

While both non-destructive evaluation (NDE) and structural health monitoring (SHM) share the objective of damage detection identification in structures, they are distinct many respects. This paper will discuss differences commonalities consider ultrasonic/guided-wave inspection as a technology at interface two methodologies. It how data-based/machine learning analysis provides powerful approach to ultrasonic NDE/SHM terms available algorithms, more generally, different techniques can...

The growing adoption of Carbon Fibre Reinforced Plastics (CFRPs) in the aerospace industry has resulted a significant reliance on Non-Destructive Evaluation (NDE) to ensure quality and integrity these materials. interpretation large amounts data acquired from automated robotic ultrasonic scanning by expert operators is often time consuming, tedious, prone human error creating bottleneck manufacturing process. However, with ever trend computing power digitally stored NDE data, intelligent...

Click to increase image sizeClick decrease size Additional informationNotes on contributorsChi-Kwong LiCHI-KWONG LI received his Ph.D. in Mathematics (matrix theory) 1986 at the University of Hong Kong under direction Yik-Hoi Au-Yeung, and held a post-doctoral position as Van Vleck Assistant Professor Wisconsin Madison from 1986–88 Hans Schneider. He then moved College William Mary. His research work is mainly matrix, operator, combinatorial theory. Besides mathematics, he enjoys Chinese...

This work presents computer-aided scan path generation for robotic non-destructive testing of complex shaped test-pieces. Off-line programmed was used to robotically inspect an aluminium fixed leading edge skin panel aircraft wing by means swept frequency eddy currents method. Eddy probe deployed a six-axis arm KUKA KR5 arc. Reverse engineering the test-piece carried out reconstruct CAD model its surface. Positioning accuracy performed continuous measured with laser tracker in accordance ISO...

The growth of the automated welding sector and emerging technological requirements Industry 4.0 have driven demand research into intelligent sensor-enabled robotic systems. higher production rates increased need for fast, robotically deployed Non-Destructive Evaluation (NDE), replacing current time-consuming manually inspection. This paper presents development deployment a novel multi-robot system in-process NDE. Full external positional control is achieved in real time allowing on-the-fly...

This work provides a solution to the challenge of small amounts training data in Non-Destructive Ultrasonic Testing for composite components. It was demonstrated that direct simulation alone is ineffective at producing representative experimental domain due poor noise reconstruction. Therefore, four unique synthetic generation methods were proposed which use semi-analytical simulated as foundation. Each method evaluated its performance classification real images when trained on Convolutional...

The requirement to increase inspection speeds for non-destructive testing (NDT) of composite aerospace parts is common many manufacturers.The prevalence complex curved surfaces in the industry provides significant motivation use 6 axis robots deployment NDT probes these inspections.The IntACom project, developed by TWI Technology Centre (Wales) and supported a number major partners Welsh government, has produced prototype robotic system.The system capable inspecting geometry components with...

Improvements in performance of modern robotic manipulators have recent years allowed research aimed at development fast automated non-destructive testing (NDT) complex geometries. Contemporary robots are well adaptable to new tasks. Several inspection prototype systems and a number commercial products been developed worldwide. This paper describes the latest progress focused large composite aerospace components. A multi-robot flexible cell is used take fundamental feasibility studies higher...

Abstract Environmental and commercial drivers are leading to a circular economy, where systems components routinely recycled or remanufactured. Unlike traditional manufacturing, typically have high degree of tolerance, in the remanufacturing process may seen decades wear, resulting wider variation geometries. This makes it difficult translate existing automation techniques perform Non-Destructive Testing (NDT) for such autonomously. The challenge performing automated inspections, with...

Non-destructive inspection of multi-pass welds for defects is traditionally performed once all layers have been deposited and the sample at ambient temperature therefore can lead to complicated expensive rework, reduced throughput, higher times. By performing either as weld deposited, or between passes, it possible identify earlier in process rectify them. Traditional ultrasonic severely limited this application due high temperatures associated with welding therefore, authors describe a...

Unmanned aerial vehicles (UAVs) are seeing increasing adoption to automated remote and in situ inspection of industrial assets, removing the need for hazardous manned access. Aerial manipulator architectures supporting pose-decoupled exertion force torque would further enable UAV deployment contact-based transducers sub-surface structural health assessment. Herein, first time, we introduce an over-actuated multirotor deploying a dry-coupled ultrasonic wheel probe as novel means wall...

This study explores the inspection of bolted connections in wind turbines, specifically focusing on application Phased Array Ultrasonic Testing (PAUT). The research comprises four sections: Acoustoelastic Constant calibration, high tension investigation bolts, blind tests larger and Finite Element Analysis (FEA) verification. methodology shows accurate results for stress while bolt is under operative loads, produces a clear indication when it above these loads beginning to deform. PAUT...