作者: prostatitis 時(shí)間: 2025-3-22 00:09
To the Moon! Space Launch System Modal Testing with Video and Motion Magnification,odal testing of large aerospace components for several years. This presentation will discuss results from the Space Launch System Integrated Modal Test (IMT) and Dynamic Rollout/Rollback Test (DRRT) in support of the Artemis I mission..During the IMT, the data collection focused on operational mode 作者: 懲罰 時(shí)間: 2025-3-22 04:25
Effects of Image-Pair Processing Styles on Phase-Based Motion Extraction,r differences to extract motion from video. Commonly, this technique is combined with the more ubiquitous digital image correlation, due in part to the restriction of PBOF to small, sub-pixel vibrations. In this chapter, work was done to delve deeper into the nominal upper bound and determine its re作者: 追逐 時(shí)間: 2025-3-22 05:39
Experiment-based optical full-field receptances in the approximation of sound radiation from a vibrlation of a vibrating plate, instead of linear structural finite-element or analytical models—overly simplified on the boundary conditions, frictions, mistunings, and non-linearities—commonly used in limited investigations about a single effective eigenmode of the structure. Spatially detailed opera作者: 不利 時(shí)間: 2025-3-22 11:14 作者: 使殘廢 時(shí)間: 2025-3-22 15:42
,Experimental Quantification of Sensor-Based Stereocameras’ Extrinsic Parameters Calibration, using a series of synchronized stereo images. Before performing 3D-DIC measurements, the stereovision system must be calibrated to determine the relative position of the two cameras. Traditionally, this has been done by taking pictures of a calibration target whose dimensions are well known. Becaus作者: 使殘廢 時(shí)間: 2025-3-22 19:34 作者: 破譯 時(shí)間: 2025-3-23 01:16 作者: 貪婪地吃 時(shí)間: 2025-3-23 04:12
Risk tolerance mapping in dynamically loaded structures as excitation dependency by means of full-fumulative damage, in the framework of a risk tolerance concept and sub-condition defect acceptance. The approach aims at mapping the specific failure risk in the component body and at grading the danger of each defect, with a proper risk index, as function of the position where it may occur, thus a 作者: vibrant 時(shí)間: 2025-3-23 09:28
Lightweight Internal Damage Segmentation Using Thermography with and Without Attention-Based Generactive thermography. This study further investigates the performance of IDSNet for segmentation of subsurface damage. The IDSNet consists of an intensive module and a superficial module. The intensive module focuses on contextual features and learning complex correlations, and the superficial module 作者: BOOR 時(shí)間: 2025-3-23 13:02
A Novel Framework for the Dynamic Characterization of Civil Structures Using 3D Terrestrial Laser Sructures of interest need to be accessed for instrumentation, which is not always feasible due to complex site conditions; (2) the reliability of the results is highly dependent on the locations and the limited number of sensors mounted on the structure. To overcome these challenges, there is a crit作者: 明智的人 時(shí)間: 2025-3-23 15:25
Orthorectification for Dense Pixel-Level Spatial Calibration for Video-Based Structural Dynamics,re such as locks and dams. Full-field approaches that make use of direct methods such as optical flow have the added attractive quality that they have demonstrated an ability to detect small damage on account of the high spatial density of pixels associated with imager measurements. For the case of 作者: arboretum 時(shí)間: 2025-3-23 20:22
Digital Twins for Photorealistic Event-Based Structural Dynamics,simulate complex structural behaviors, they also have potential for structural health monitoring (SHM) applications. Video-based SHM techniques are advantageous due to the lower installation/maintenance costs, analysis in high-spatial resolution, and its non-contact monitoring features. Both digital作者: muffler 時(shí)間: 2025-3-23 23:37 作者: cataract 時(shí)間: 2025-3-24 06:02 作者: chemical-peel 時(shí)間: 2025-3-24 08:21 作者: BLUSH 時(shí)間: 2025-3-24 12:51 作者: 急性 時(shí)間: 2025-3-24 16:24
Detection of Missing Rail Fasteners Using Train-Induced Ultrasonic Guided Waves: A Numerical Study,s study is part of an ongoing project that intends to develop a non-contact damage detection system based on the measurements obtained from a laser Doppler vibrometer placed on a moving platform. To achieve the goal, (i) modal analysis was conducted to determine the frequency range of interest in wh作者: Malcontent 時(shí)間: 2025-3-24 21:49
Dynamic Mode Decomposition for Resonant Frequency Identification of Oscillating Structures,as edges, are prime candidates for motion estimation; however, their rapid motion can pose problems for computer vision techniques. Most vibration seen in video is unperceivable to the naked eye, which can make sub-pixel displacement extraction more complex. Phase-based motion magnification (PMM) is作者: Graduated 時(shí)間: 2025-3-25 02:09 作者: NUDGE 時(shí)間: 2025-3-25 04:44
https://doi.org/10.1007/978-94-010-3170-7ncy operational mode shapes and help the test team better understand the physics of the torsion mode..Building upon the success of the IMT motion magnification work, a camera system was used during the DRRT to find operational mode shapes, if the physics of the low-frequency torsion mode remained wi作者: Palate 時(shí)間: 2025-3-25 10:02 作者: 背心 時(shí)間: 2025-3-25 15:21
,Hera’s Divine Birth Priestesshood,d structural dynamics, with effective constraints and damping characteristics. The Rayleigh’s approach is here reformulated to take advantage of the full-field receptances, to obtain maps of acoustic pressure frequency response functions, or of acoustic pressure, once the structural excitation signa作者: STERN 時(shí)間: 2025-3-25 18:59 作者: assail 時(shí)間: 2025-3-25 22:25
The Cult of Divine Birth in Ancient Greeceance meter are used to measure the cameras’ relative position and orientation in space. In this chapter, the performance of the proposed sensor-based extrinsic calibration is compared with the traditional image-based calibration method. Laboratory tests show that the extrinsic parameters computed wi作者: Culpable 時(shí)間: 2025-3-26 01:25
Wartime and Postwar Historiography, 1940–53ency band, without any structural FE or analytical models to be accurately tuned. Examples and details are given specifically as the excitation is changed in its dynamic signature, in order to show how the most advanced experiment-based knowledge available can augment the fidelity of the proposed ri作者: upstart 時(shí)間: 2025-3-26 07:19
https://doi.org/10.1057/9781403919694develop a novel end-to-end framework to monitor the dynamic vibrations of structures using a TLS operating in the helical mode, where the TLS is operating at a fixed horizontal angle. To accomplish this goal, an extensive experimental study was conducted to investigate the effect of structure-based 作者: jungle 時(shí)間: 2025-3-26 09:33 作者: 兩種語言 時(shí)間: 2025-3-26 13:06 作者: uncertain 時(shí)間: 2025-3-26 20:44 作者: 似少年 時(shí)間: 2025-3-26 21:07 作者: thwart 時(shí)間: 2025-3-27 01:13
Reinventing the State of Natures of the rotating structure are estimated from fast Fourier transforms of measured data. Undamped mode shapes are estimated by multiplying measured data by sinusoidal signals whose frequencies are estimated damped natural frequencies and applying low pass filters to measured data multiplied by the s作者: 花費(fèi) 時(shí)間: 2025-3-27 06:23 作者: PTCA635 時(shí)間: 2025-3-27 12:37
https://doi.org/10.1057/9780230337596permits an unsupervised approach of extracting structural dynamic parameters from video. Out-of-plane resonant frequencies are estimated from a 2.7 (m) wind turbine blade. The findings are compared to current state-of-the-art methodologies such as traditional wired sensing. The determination of reso作者: 節(jié)省 時(shí)間: 2025-3-27 17:36 作者: 哺乳動物 時(shí)間: 2025-3-27 19:07 作者: 說明 時(shí)間: 2025-3-27 22:24
Effects of Image-Pair Processing Styles on Phase-Based Motion Extraction,he hybrid processing style can be used for large-motion handling in simple structures, as well as modifications required for those that are heavily textured. The hybrid processing style is shown to extend the upper bound to the number of pixels between parallel edges within the structure, increasing作者: 腐爛 時(shí)間: 2025-3-28 03:43 作者: 狂怒 時(shí)間: 2025-3-28 07:17
Measurements of Panel Vibration with DIC and LDV Imaged Through a Mach 5 Flow,k) was measured using 3D-DIC and LDV, by imaging the panel through the flow. Additional optical distortions were generated by a 27.5. compression ramp that was installed on the floor of the tunnel and generated a shock-induced, turbulent separated flow. Results showed that the LDV data were not affe作者: 創(chuàng)新 時(shí)間: 2025-3-28 11:02
,Experimental Quantification of Sensor-Based Stereocameras’ Extrinsic Parameters Calibration,ance meter are used to measure the cameras’ relative position and orientation in space. In this chapter, the performance of the proposed sensor-based extrinsic calibration is compared with the traditional image-based calibration method. Laboratory tests show that the extrinsic parameters computed wi作者: 搜尋 時(shí)間: 2025-3-28 17:39 作者: DAFT 時(shí)間: 2025-3-28 21:05 作者: 慎重 時(shí)間: 2025-3-29 00:21 作者: 防水 時(shí)間: 2025-3-29 05:39 作者: 樹膠 時(shí)間: 2025-3-29 09:21 作者: MOAT 時(shí)間: 2025-3-29 11:52 作者: Irrigate 時(shí)間: 2025-3-29 17:29
Operational Modal Analysis of a Rotating Structure Using Image-Based Tracking Continuously Scannings of the rotating structure are estimated from fast Fourier transforms of measured data. Undamped mode shapes are estimated by multiplying measured data by sinusoidal signals whose frequencies are estimated damped natural frequencies and applying low pass filters to measured data multiplied by the s作者: ERUPT 時(shí)間: 2025-3-29 22:44 作者: 言外之意 時(shí)間: 2025-3-30 03:21 作者: expository 時(shí)間: 2025-3-30 06:13
Computer Vision & Laser Vibrometry, Volume 6978-3-031-34910-2Series ISSN 2191-5644 Series E-ISSN 2191-5652 作者: chronology 時(shí)間: 2025-3-30 09:30 作者: helper-T-cells 時(shí)間: 2025-3-30 14:57 作者: 可觸知 時(shí)間: 2025-3-30 20:10 作者: annexation 時(shí)間: 2025-3-30 23:01
https://doi.org/10.1007/978-94-010-3170-7odal testing of large aerospace components for several years. This presentation will discuss results from the Space Launch System Integrated Modal Test (IMT) and Dynamic Rollout/Rollback Test (DRRT) in support of the Artemis I mission..During the IMT, the data collection focused on operational mode 作者: 抗原 時(shí)間: 2025-3-31 03:56 作者: 逃避系列單詞 時(shí)間: 2025-3-31 08:53
,Hera’s Divine Birth Priestesshood,lation of a vibrating plate, instead of linear structural finite-element or analytical models—overly simplified on the boundary conditions, frictions, mistunings, and non-linearities—commonly used in limited investigations about a single effective eigenmode of the structure. Spatially detailed opera作者: 爆炸 時(shí)間: 2025-3-31 12:09 作者: Blood-Clot 時(shí)間: 2025-3-31 16:17 作者: MOCK 時(shí)間: 2025-3-31 20:55
The Cult and Maintenance of Honor,opment of abdominal aortic aneurysms (AAAs) in patients. The setup consists of a single high-speed camera and a mirror that enables a second viewing angle captured by the same image sensor. This setup thus allows for 3D measurements of the motions on the patient’s body surface. Subsequent signal pro作者: 聽覺 時(shí)間: 2025-3-31 22:14 作者: Occupation 時(shí)間: 2025-4-1 05:26
Wartime and Postwar Historiography, 1940–53umulative damage, in the framework of a risk tolerance concept and sub-condition defect acceptance. The approach aims at mapping the specific failure risk in the component body and at grading the danger of each defect, with a proper risk index, as function of the position where it may occur, thus a 作者: BRIBE 時(shí)間: 2025-4-1 07:50 作者: 編輯才信任 時(shí)間: 2025-4-1 13:53
https://doi.org/10.1057/9781403919694ructures of interest need to be accessed for instrumentation, which is not always feasible due to complex site conditions; (2) the reliability of the results is highly dependent on the locations and the limited number of sensors mounted on the structure. To overcome these challenges, there is a crit
