Results 51 to 60 of about 75,511 (297)

Current Tracking Adaptive Control of Brushless DC Motors

International Journal of Adaptive Control and Signal Processing, EarlyView.
In this paper, the current tracking for Brushless Direct Current motors is approached considering uncertainty in the parameters of the motor's model. An adaptive control scheme to compensate electrical parameters uncertainty is proposed without requiring any knowledge of the mechanical parameters.
Fernanda Ramos‐García, Axel Coronado‐Andrade, Gerardo Espinosa‐Pérez, Luis Alvarez‐Icaza   +3 more
wiley   +1 more source

Angle of repose revisited: When is a heap a cone?

EPJ Web of Conferences, 2017
The angle of repose is a frequently reported value in bulk solids characterisation and its popularity is based on the simple measurement setup. It can be useful to estimate the flowability of a bulk material or to estimate the inner friction coeffcient ...
Rackl Michael, Grötsch Florian E., Günthner Willibald A.   +2 more
doaj   +1 more source

Granular flow down a rough inclined plane: transition between thin and thick piles

, 2002
The rheology of granular particles in an inclined plane geometry is studied using molecular dynamics simulations. The flow--no-flow boundary is determined for piles of varying heights over a range of inclination angles $\theta$.
Aguirre M. A., Aguirre M. A., Ahn H., Ancey C., Ancey C., Andreotti B., Aradian A., Aranson I. S., Bagnold R. A., Bocquet L., Cundall P. A., Daerr A., Daerr A., Ertaş D., Gary S. Grest, Hanes D. M., James W. Landry, Lemieux P.-A., Leonardo E. Silbert, Louge M. Y., Mehta A., Mills P., Nerone N., Pouliquen O., Pöschel T., Sadjadpour M., Silbert L. E., Silbert L. E., Silbert L. E., Silbert L. E., Silva M. D., Walton O. R., Zheng X. M., Zhou Y. C.   +33 more
core   +1 more source

Bistable Mechanisms 3D Printing for Mechanically Programmable Vibration Control

Advanced Engineering Materials, EarlyView.
This work introduces a 3D‐printed bistable mechanism integrated into tuned mass dampers (TMDs) for mechanically adaptive passive vibration suppression. Through optimized geometry, the bistable design provides adaptable vibration reduction across a broad range of scenarios, achieving effective vibration mitigation without complex controls or external ...
Ali Zolfagharian, Frédéric Demoly, Mohammad Lakhi, Bernard Rolfe, Mahdi Bodaghi   +4 more
wiley   +1 more source

Calibration of Contact Parameters for Moist Bulk of Shotcrete Based on EDEM

Advances in Materials Science and Engineering, 2022
To obtain the contact parameters of the moist bulk of shotcrete accurately and quickly, this study calibrated the contact parameters of the moist bulk of shotcrete by physical stacking test and simulation method.
Guanguo Ma, Zhenjiao Sun, Hui Ma, Pengcheng Li   +3 more
doaj   +1 more source

Possible Stratification Mechanism in Granular Mixtures

, 1998
We propose a mechanism to explain what occurs when a mixture of grains of different sizes and different shapes (i.e. different repose angles) is poured into a quasi-two-dimensional cell.
H. A. Makse, H. Eugene Stanley, H. M. Jaeger, Hernán A. Makse, J. A. C. Gallas, J. C. Williams, J.-P. Bouchaud, P.-G. de Gennes, Pierre Cizeau, R. A. Bagnold, R. L. Brown, T. Boutreux   +11 more
core   +1 more source

Multimodal Mechanical Testing of Additively Manufactured Ti6Al4V Lattice Structures: Compression, Bending, and Fatigue

Advanced Engineering Materials, EarlyView.
In this experimental study, the mechanical properties of additively manufactured Ti‐6Al‐4V lattice structures of different geometries are characterized using compression, four point bending and fatigue testing. While TPMS designs show superior fatigue resistance, SplitP and Honeycomb lattice structures combine high stiffness and strength. The resulting
Klaus Burkart, Jonas Schmidt, Anastasiya Toenjes, Johanna Eisenträger   +3 more
wiley   +1 more source

Discrete Element Model of Oil Peony Seeds and the Calibration of Its Parameters

Agriculture
Oil peony is an important oil crop that is primarily sown by using artificial methods at present. Its seeder encounters the problems of low efficiency of seeding that significantly limits the highly efficient mechanized production of high-quality peony ...
Hao Zhou, Kangtai Li, Zhiyu Qin, Shengsheng Wang, Xuezhen Wang, Fengyun Sun   +5 more
doaj   +1 more source

Stratification Instability in Granular Flows

, 1998
When a mixture of two kinds of grains differing in size and shape is poured in a vertical two-dimensional cell, the mixture spontaneously stratifies in alternating layers of small and large grains, whenever the large grains are more faceted than the ...
A. Mehta, A. Rosato, E. Clément, F. Cantelaube, H. A. Makse, H. A. Makse, H. J. Herrmann, H. K. Pak, H. M. Jaeger, H. M. Jaeger, H. M. Jaeger, Hernán A. Makse, J. A. Drahun, J. B. Knight, J. C. Williams, J. C. Williams, J. Duran, J. L. Borges, J.-P. Bouchaud, J.-P. Bouchaud, O. Zik, P. Meakin, R. A. Bagnold, R. A. Bagnold, R. A. Bagnold, R. L. Brown, S. F. Edwards, S. Savage, T. Boutreux, W. Cooke   +29 more
core   +1 more source

PBF‐LB/M of Ti‐6Al‐4V: High‐Pressure Solution Treatment and Aging for Applications in a Sustainable Aerospace

Advanced Engineering Materials, EarlyView.
Additive manufacturing (AM) allows great geometric freedom for lightweight components. As parts are progressively optimized exploiting potentials in AM leading in smaller material cross sections, high pressure solution treating and aging (STA) treatments show an enormous potential for strongly improving material properties.
Mika León Altmann, Andre Danzig, Freerk Syassen, Rainer Fechte‐Heinen, Anastasiya Toenjes   +4 more
wiley   +1 more source