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VDI Wissensforum GmbH - International Conference on Gears 2017

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VDI Wissensforum GmbH (Hrsg.)

International Conference on Gears 2017

Reihe: VDI-Berichte

Band 2294 2017

Treffer in den folgenden Teilen:

E. Böyükbaş, H. J. Stadtfeld Surface structure shift for ground bevel gears S. 1391-1402

„… after the grinding operation is the only possibility to change the surface structure from the strongly …” „… structure from lapping superimposed to a precisely ground flank surface presents a combination of accuracy …” „… Surface Structure Shift for Ground Bevel Gears Dipl.-Ing. (FH) Eyüp Böyükbaş, Gleason Pfauter …”

C. Brecher, C. Löpenhaus, F. Goergen, D. Mevissen Crack propagation analysis of pitting damages of high-strength material systems in gear applications S. 281-292

„… the rolling-motion. The comparison with the experiment shows that the plateau structure in the …” „… applications, the demand on high power density is continuously growing. Apart from optimizing tooth shape …” „… by the cyclic alternating stress in the immediate vicinity of the initial crack. The connection from …”

E. Rigaud, P.-H. Cornuault, B. Bazin, E. Grandais-Menant Prediction of the vibroacoustic response of an electric window-lift gear motor S. 635-648

„… Ft transmitted to the supporting structure by the gear motor is introduced from the set of reaction …” „… surface and the equivalent global dynamic force transmitted to the supporting structure are compared …” „… motion of the rotor. A worm is machined in the steel rotor, between the front and the center journal …”

M. Koop, E. Melnikov, V. Merz Design investigations and indications for acoustical optimized gear meshes using plastic gears S. 1519-1530

„… errors like runout et cetera Once the structure borne sound is generated, it has to be transferred …” „… transmission of circular motion in a perfect shaped and ideal stiff gear mesh would be perfectly steady …” „… high-toothed gear. It can be seen, that from this point of view, the variations are lowest for the stiffer …”

B. Guilbert, P. Cutuli, P. Velex Hybrid dynamic model of hollow thin-rimmed gears S. 623-634

„… combines lumped parameter elements and condensed finite element sub-structures along with a mortar-based …” „… link the gear contact line DOF’s ( 2 ( )ijMu ) to the sub-structure master nodes DOF’s ( 2X ) in order …” „… to avoid numerical errors leading to numerical spikes in tooth load distributions arising from …”

T. Saito, K. Miyamoto Traction drive analysis identified with rheological friction property of traction fluid S. 1185-1190

„… temperature were identified from the dynamic behavior analysis model for a four-roller test apparatus together …” „… the vibration, displacement, and traction surface heat generation resulting from dynamic contact, FEM …” „… glass transition from liquid to solid phase under high contact pressure conditions, and high shear …”

J. J. Liou, S. Rakuff The development of worm drives S. 503-516

„… . The movement of a worm drive is purely caused by screw motion – sliding on the mated surfaces …” „… continually scraped aside due to the above mentioned sliding motion. Consequently, the high temperature will …” „… better foreseeing future prospects. The following is the outlook for worm drives from authors’ points of …”

B. Kohn, T. Utakapan, M. Fromberger, M. Otto, K. Stahl Flank modifications for optimal excitation behaviour S. 1319-1330

„… different design goals have to be picked from a mass calculation and the different mesh orders cannot be …” „… flank designs result from the complexity of the flank forms or the implications of the gear main …” „… regarding the NVH goals. The main target for a silent mesh design is a constant transmission of motion over …”

R. Nemoto, E. Tamura, N. Seyama, E. Tanaka Friction loss and surface durability of WN gears – A Comparison with involute gears S. 1133-1138

„… other is a Wildhaber-Novikov or circular-arc profile. WN gears are used to be transmitted motion and …” „… circulating test rig. The experiments concerning frictional loss were carried out quite separately from the …” „… stepped up from the lowest load stage to the object. 2. Test gears A description of test gears is …”

G. Goch, K. Ni, Y. Peng, A. Günther Paradigm change in cylindrical gear metrology using areal measurement and evaluation S. 1025-1038

„… surface structures on gear flanks improving their functional performance require detailed topographical …” „… standardized approach, line-oriented methods can hardly extract sufficient surface information, even from …” „… , zi,j). Its dis- VDI-Berichte Nr. 2294, 2017 1029 tance from the involute, dlot,i,j, can be expressed …”

S.-J. Tsai, L.-C. Chang, C.-H. Huang Design of cycloid planetary gear drives with tooth number difference of two – a comparative study on contact characteristics and load analysis S. 61-74

„… cycloid planetary gear reducers are important drives for power and/or precision motion transmission. The …” „… . Each involute planet is mounted on a crank shaft to generate the revolution motion of the cycloid disk …” „… requirements on precise motion. To this purpose, the loads acting on the contact tooth pairs and the cranks …”

M. Shuai, M. Shuai, J. Guoguang, Z. Yidu, L. Chao, H. Haruo Research on multiple-split load sharing characteristics of 2-stage external meshing star gearing system S. 769-782

„… components of the star gear train respectively, and considering the floating meshing error resulting from …” „… intake box, the power input from the free turbine shaft and output from the second sun gear. Two-stage …” „… load sharing coefficients determination, vibration noise reduction, structure optimization, error …”

M. Hein, T. Tobie, K. Stahl Test method for time-scaled fatigue tests of gear transmission systems S. 1073-1084

„… well as influences from deformation of the shaft-bearing system. As in ISO 6336-6 [1] the damage …” „… , influences from a varying load distribution can be considered in detail. Fig. 1: Stress / load cycle (S/N …” „… need to be converted from stress to torque. Thus, a T/N curve for each damage mechanism can be …”

J. Papies Load distribution in planetary gears considering effects of manufacturing tolerances with a statistical approach S. 783-794

„… cannot be derived from this. In reality all measured data has a scatter depending on the process …” „… to positional deviations of the planetary gears from their theoretical center position, for example …” „… transmission structure with all input data according to the RIKOR I parameters (step 1) can be entered on the …”

D. Talbot, A. Kahraman Simulation of gear wear using a dynamic load distribution model S. 5-16

„… contact stress. Likewise, the impact of dynamic loading at or away from system resonances on surface …” „… deformation [11-13]. The discretization also identifies the separation, t G , (deviation from conjugacy …” „… br and 2br are the base radii of the gears. The governing equation of motion is given as [9], 1 …”

Y. Cai, L. Yao, Z. Xie, J. Zhang, C. Peng Influence analysis of system parameters on characteristics of the nutation drive with double circular arc spiral bevel gears S. 435-446

„… the principles of planetary and gyroscopic motion. Advantages such as the simple structure, large …” „… three-coordinate measuring instrument to collect data from the gear tooth surface [13]. Similarly, Simon et al …” „… . From the Eq. (1), we can obtain the following formula. tan …”

M. Ophey, F. Klocke, C. Löpenhaus Approach for modeling grinding worm wear S. 1365-1378

„… acting stress complex, Figure 1. The stress complex results from the temporal movement sequence, the way …” „… ) Structure of the Tribological System Surrounding Medium (Air) v Main Body (Workpiece) Counter Body …” „… complex results from the adjustable process parameters as well as the process kinematics. These …”

S. Stoyanov, V. Dobrev, A. Dobreva Investigating dynamic behavior of planetary gear trains through the systematic approach S. 197-208

„… resonances away from operating speeds, minimizing response and optimizing the structural design. Therefore …” „… tuning resonances away from operating speeds, minimizing response and optimizing the structural design …” „… tangential to the surfaces motions. In the normal direction, it is proportional to the relative velocity …”

B. Kianian, C. Andersson Sustainability-conscious Powder Metallurgy gear manufacturing – An analysis of current manufacturing challenges S. 1251-1264

„… of the basic mechanical parts to industrial segments where motion and power transfer are needed [3 …” „… conventional gear manufacturing or in PM gear manufacturing. In total nine people, three from each company …” „… operational processes from 11 to 4 stages. These advantages potentially save quite a lot of machining …”

Titelei/Inhaltsverzeichnis

„… , The effect on tooth root breakage strength of tooth root 733 Y. Suzuki, shapes resulting from …” „… control with simple cutter motion in 1379 R. Kikuchi, face-milling of zerol bevel gears using 5-axis …” „… machine D. Iba, M. Nakamura, M. Nagatsuka E. Böyükbaş, Surface structure shift for ground bevel gears …”

doi.org/10.51202/9783181022948

Bastian Wandt - Human Pose Estimation from Monocular Images

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Bastian Wandt

Human Pose Estimation from Monocular Images

Reihe: Informatik/ Kommunikation

Band 869 2020

Treffer in den folgenden Teilen:

Introduction S. 1-16

„… formulation of temporal priors to resolve depth ambiguities. This is known as the Structure-from-Motion …” „… problem [84] or, in the case of deforming objects, as the Non-Rigid Structure-from-Motion (NRSfM) [10 …” „… research in the three fields non-rigid structure from motion, time consistent motion capture and single …”

Related Work S. 17-21

„… briefly reviews the most important works in the field of non-rigid structure from motion which is closely …” „… discussed in the subsequent chapter in Section 3.4 and 3.5. 2.1 non-rigid structure-from-motion In 1992 …” „… deterministic structure from motion based on assumptions of rigidity only in the body’s torso. Tekin et al. [80 …”

Bibliography S. 101-116

„… Dual Representation for Nonrigid Structure from Motion.” In: IEEE Transactions on Pattern Analysis and …” „… Structure-from-motion Factorization.” In: Conference on Computer Vision and Pattern Recognition (CVPR). CVPR ’12 …” „… Martinez. “Kernel Non-Rigid Structure from Motion.” In: International Conference on Computer Vision (ICCV …”

Titelei/Inhaltsverzeichnis

„… . . . . . . . . . . . . . . . . . . 13 2 related work 17 2.1 Non-rigid Structure-from-Motion . . . . . . . . . . . . . . 17 2.2 Single …” „… of Human Poses . . . . . . . . . . . . . 31 3.3 Non-Rigid Structure from Motion …” „… Ground Truth KCS Kinematic Chain Space NRSfM Non-Rigid Structure from Motion MoCap Motion Capture MPJPE …”

Fundamentals S. 22-39

„… human poses are introduced. The basics of factorization based (non-rigid) structure from motion …” „… structure from motion e. g. [84] assumed an orthographic projection of the observed object. In this thesis …” „… autoencoders with nonlinear activation functions 32 3.3 non-rigid structure from motion Section 3.2.3.1 …”

Exploiting Temporal Properties S. 40-79

„… Structure from Motion (SfM) problem. It was later extended by Bregler et al. [10] to the non-rigid case and …” „… consequently named Non-Rigid Structure from Motion (NRSfM) (see Section 3.3). Since a human skeleton can be …” „… poses (Section 4.1.1), like in standard structure from motion approaches (Section 3.3). The 3D poses are …”

Single Image Reconstruction Using Adversarial Training S. 80-96

„… motion from the test set of Human3.6M. The left 3D skeleton is the ground truth (GT) and the right shows …” „… frame for every motion can be seen in Figure 5.4. For comparability we show the same frame from every …” „… motion sequence from the same viewing angle. Even difficult poses, for instance sitting cross-legged, are …”

doi.org/10.51202/9783186869104

Marco Munderloh - Detection of Moving Objects for Aerial Surveillance of Arbitrary Terrain

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Marco Munderloh

Detection of Moving Objects for Aerial Surveillance of Arbitrary Terrain

Reihe: Informatik/ Kommunikation

Band 847 2016

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Introduction S. 1-9

„… of the camera motion and a model of the background structure, whose parameters have to be determined …” „… from global motion. The most common model in aerial surveillance to approximate the surface of the …” „… and assumptions of the maximum height of background structure into the error equations, a motion …”

Multi-Planar Landscape Model based on Triangle Meshes S. 58-72

„… structure allows an individual motion compensation of image regions in the image plane projected from scene …” „… suppress the relief displacements of non-planar ground structure during motion compensation for the use in …” „… estimated optical flow as well as any motion not emerging from the movement of the static background scene …”

Basic Principles S. 10-33

„… tracking workflow used in structure from motion Feature detection Correspondence analysisz −1 refinement …” „… more common and used in e.g. structure from motion. Hereby, features for the full frame are only …” „… to e.g. increase the baseline of the camera for structure from motion. The second method, depicted in …”

Titelei/Inhaltsverzeichnis

„… of image pixels resulting from the motion of the camera need to be compensated. The most common …” „… motion. This work addresses the problem in two ways. After analyzing the error resulting from motion …” „… Subtraction . . . . . . . . . 23 2.7 Motion Estimation from Image Sequences . . . . . . . . . . . . . . . 25 …”

Experiments S. 73-92

„… 4.2 and the motion parallax predictor classifier from Equation 3.55 in Chapter 3.6. Moving objects are …” „… their ability to distinguish between motion coming from static objects such as the ground plane or …” „… ", respectively. Additionally, the motion parallax predictor classifier from Chapter 3.6 (in the tables referred …”

Summary and Conclusions S. 93-96

„… at approximately 5 km/h cannot be distinguished from the motion displacement of an object with a …” „… 93 6 Summary and Conclusions The problems of the planar ground model in a motion detection system …” „… global motion model. The second method is the pixel-based detection by background subtraction, in which …”

Bibliography S. 97-106

„… 3-540-55426-2. [21] O. D. Faugeras and F. Lustman. Motion and Structure From Motion in a Piecewise Planar …” „… . [14] K. Cordes. Occlusion Handling in Scene Reconstruction from Video, volume 10. VDI Verlag, 2014 …” „… . E. Debevec, C. J. Taylor, and J. Malik. Modeling and rendering architecture from photographs: a …”

doi.org/10.51202/9783186847102

VDI Wissensforum GmbH - Dritev – Drivetrain For Vehicles 2018

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VDI Wissensforum GmbH (Hrsg.)

Dritev – Drivetrain For Vehicles 2018

Reihe: VDI-Berichte

Band 2328 2018

Treffer in den folgenden Teilen:

J.-E. Moseberg, J. Kohlhoff, S. Hekeler Electric all-wheel drive: enhancing vehicle dynamics and driving safety by wheel-individual torque distribution – How to make use of the over-actuation of electrified vehicles

„… the steering wheel angle as inputs from the driver a desired vehicle motion as well as the …” „… situated close to the wheels, the number of control variables to actively influence the horizontal motion …” „… structure presented in this paper uses these additional control variables for torque vectoring to enhance …”

R. Buchberger, O. Grieshofer, K. Puchner, R. Sereinig System optimization of electric drives in terms of lightweight design, acoustics and efficiency by means of modern transmission simulation methods

„… Topology optimization is a key technology to get efficient light weight structure right from the beginning …” „… structure borne noise has been developed and successfully used for MPT's eDrive developments. For …” „… . VDI-Berichte Nr. 2328, 2018 31 Electric drives from MPT are highly integrated systems. Due to this, it is not …”

T. Gemassmer Approaches to increase efficiency and dynamics of ipmsm traction drives by optimization of control strategies

„… reference values for a desired torque is analyzed. A structure is introduced, that assures stable operation …” „… derived directly from the time constants of the current control paths and (16) in case of linear …” „… machine behavior. Common design criterions for the gains of a PI current controller can be taken from …”

M. Behzad, V. Saxena, M. Schaefer Thermal-hydrodynamic optimization of grooves in a wet clutch

„… changing groove orientation from NA to PA. They also show that this modification produces no other …” „… of different crossing planes referred in the results section. Rotational motion of SP was …” „… boundary condition, it is assumed that only air can enter the domain from OD. This boundary condition at …”

K. Bennewitz, A. Mann Powertrain electrification exemplified by the VW Golf

„… its launch, Volkswagen’s Golf provides a wide spectrum of electrification ranging from the …” „… are worldwide requiring a further significant reduction of fleet CO2 emissions. From Volkswagen’s …” „… entire chain from fuel production to the driven wheel (well-to-wheel), alternative fuels are suitable …”

doi.org/10.51202/9783181023280

Marcel König - Partitioned Solution Strategies for Strongly-Coupled Fluid-Structure Interaction Problems in Maritime Applications

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Marcel König

Partitioned Solution Strategies for Strongly-Coupled Fluid-Structure Interaction Problems in Maritime Applications

Reihe: Mechanik/Bruchmechanik

Band 351 2018

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Advanced Applications S. 218-240

„… can safely disembark from the ship to the offshore structure. For the numerical analysis of the …” „… surrounding flow field, the ship motion in the seaway represents a strongly-coupled problem. Apart from the …” „… influence of the monopile structure on the catamaran motion can be spotted. 7.2.4 Contact Problem between …”

Software Library comana S. 98-157

„… sockets into a single data structure. From an algorithmic point of view, each master socket group and its …” „… APDL. Apart from 130 5.6 Adapter Data Structures the generic solver-independent components, the adapter …” „… must be converted to MATLAB/Octave data structures – and vice versa. From C/C++, MATLAB/Octave …”

Structural Problems S. 25-41

„… configuration: ρX = Jρ . (3.28) From Newton’s second law of motion, we learn that the change in linear momentum …” „… . In the most general case, the mechanical structure is treated as a deformable body undergoing large …” „… displacements and large rotations. In Section 3.1, we derive the governing equations of motion and introduce the …”

Benchmark Problems S. 158-217

„… structure. This subproblem is again solved using the pimpleDyMFoam solver from the OpenFOAM [123] package …” „… s))m/s is prescribed, whereas vy = 0m/s. At the inlet, the velocity vx varies linearly from vx = 0m/s at …” „… pimpleDyMFoam solver, which is part of the opensource CFD package OpenFOAM [123]. For the structure, we employ …”

Fluid Problems S. 5-24

„… material particles and the mesh. Note that ṽ is distinct from w; only if the mesh motion is purely …” „… performance. 2.1 Incompressible Navier-Stokes Equations In order to describe the motion of a continuous fluid …” „… referential configuration Ωχ, the material configuration ΩX following the particle motion in space, and the …”

Conclusions and Outlook S. 241-251

„… the structure under different environmental conditions. The motion behavior of the floating OWT …” „… electro-thermo-mechanically coupled problems. Being in reasonable agreement with the reference solutions available from the …” „… procedure was also employed to investigate more advanced applications from the maritime industry. In a first …”

Coupled Problems S. 42-97

„… topological information from the computational mesh, and they need to be tailored to the data structure of …” „… converged solution in the current time increment than the converged solution from the previous time …” „… deformation of the mechanical structure, which in turn also leads to a change in the surrounding fluid flow …”

doi.org/10.51202/9783186351180

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