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M. Khamashta

Bio: M. Khamashta is an academic researcher from Polytechnic University of Catalonia. The author has contributed to research in topics: Gear pump & Hydraulic cylinder. The author has an hindex of 4, co-authored 8 publications receiving 154 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, the authors demonstrate the use of an empirical and simplified approach based on an optical technique and a home-made ad hoc code that gives knowledge of the shape and fallin...
Abstract: The work presented in this article demonstrates the use of an empirical and simplified approach based on an optical technique and a home-made ad hoc code that give knowledge of the shape and fallin...

51 citations

Journal ArticleDOI
TL;DR: In this article, the authors presented a simplified analytical model of a trochoidal-type machine when friction at the contact points is neglected and evaluated the performance of the gear set through the calculation of the normal maximum contact stress in the gear teeth.

50 citations

Journal ArticleDOI
TL;DR: In this paper, the authors describe the behavior of actuators under load capacity with experimental validation, characterizing the critical factors that cause the collapse and proposing useful design criterions.

46 citations

Journal ArticleDOI
TL;DR: In this paper, a study of the influence of friction moments when misalignment effects are deliberately left aside is carried out, and a theoretical and experimental work has been carried out for columns and an actuator characterizing the critical factors that cause the collapse.

19 citations

Proceedings ArticleDOI
03 Nov 2016
TL;DR: In this article, a numerical study in a mini trochoidal-gear pump based on an ingenious strategy to adapt the background mesh to the profiles shape and a new boundary condition is presented.
Abstract: A numerical study in a mini trochoidal-gear pump based on an ingenious strategy to adapt the background mesh to the profiles shape and a new boundary condition is presented. The strategy achieves a final background mesh better adapted to the geometries and, additionally, the cells are more homogenous and less distorted when the trochodial-profiles are moved. The new boundary condition to simulate the multi-meshing contact points is applied at every time step by means of the viscous wall approach, a home-made ad-hoc code, which has been integrated in an OpenFOAM solver that also includes the dynamic mesh functionality by deforming the mesh following the trochoidal-gear rotation. The presented numerical study establishes the basis that will allow simulating more realistic aspects of a new design of a mini trochoidal-gear pump once the need for a continuous fluid domain is overcome reproducing actual contacts between the rotors and will guide to a better understanding of the new design.

4 citations


Cited by
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Journal ArticleDOI
Yaguo Lei1, Naipeng Li1, Liang Guo1, Ningbo Li1, Tao Yan1, Jing Lin1 
TL;DR: A review on machinery prognostics following its whole program, i.e., from data acquisition to RUL prediction, which provides discussions on current situation, upcoming challenges as well as possible future trends for researchers in this field.

1,116 citations

Journal ArticleDOI
TL;DR: A brief introduction of RUL prediction is given and the start-of-the-art DL approaches in terms of four main representative deep architectures, including Auto-encoder, Deep Belief Network, DBN, Convolutional Neural Network and Recurrent Neural Network are reviewed.

78 citations

Journal ArticleDOI
TL;DR: In this paper, an experimental investigation of an indirect solar dryer integrated with phase change material has been carried out for drying Valeriana Jatamansi in the Himalayan region, Solan (latitude − 30.91°N, longitude − 77.09°E), Himachal Pradesh (India).

75 citations

Journal ArticleDOI
TL;DR: This work highlights the development history and focuses particularly on the research of piezoelectric pumps in four aspects: configuration design, working mode, optimization and application, respectively, and attempts to provide both a guidance for piezOElectric pump researchers on improving their output performances and a resource for those outside the field who wish to identify the best piezoeselectric pump for a particular application.

66 citations

Journal ArticleDOI
TL;DR: In this article, the authors developed a general mathematical model of trochoidal gearing that can be applied for Gerotor pumps and cyclo reducers, where the inner gear profile is described by peritrochoid equidistance and the outer gear profile by circular arc.
Abstract: This paper explains development of the general mathematical model of trochoidal gearing that can be applied for gerotor pumps and cyclo reducers. The model analyzes geometry and physics of the gearing pair in trochoidal pump where the outer gear has one tooth more than the inner gear. The inner gear profile is described by peritrochoid equidistance and the outer gear profile by circular arc. Mathematical model of gearing with clearances is based on the principle of an ideal profile development. Minimum clearance height between teeth profiles in relation to instantaneous gear ratio is determined. The influence of gear profile geometrical parameters on gearing process, clearance height change, and pulsation of drive moment is analyzed and presented in numerical examples. Obtained results can be used for the design of the trochoidal gearing where accurate and silent operation is required. [DOI: 10.1115/1.4005621]

51 citations