Results 21 to 30 of about 205,324 (238)

Positioning Errors Measurement of CNC Machine Tools Based on J-DBB Method

Applied Sciences, 2021
Due to the errors of the servo system and the errors of the ball screw drive system, the positioning errors inevitably occur in the process of CNC machine tools.
Tao Sun, Wen Wang, Zhanfeng Chen, Yewen Zhu, Kaifei Xu, Haimei Wu, Zhiqian Sang, Keqing Lu, He Yang   +8 more
doaj   +1 more source

An Investigation of Various Controller Designs for Multi-Link Robotic System (Robogymnast)

Knowledge, 2022
An approach to controlling the three-link Robogymnast robotic gymnast and assessing stability is proposed and examined. In the study, a conventionally configured linear quadratic regulator is applied and compared with a fuzzy logic linear quadratic ...
Bdereddin Abdul samad, Mahmoud Mohamed, Fatih Anayi, Yevgen Melikhov   +3 more
doaj   +1 more source

Retrospective study comparing the clinical outcomes of bar-clip and ball attachment implant-supported overdentures.

Journal of Oral Science, 2020
The aim of this study was to compare the clinical outcomes of implant-supported overdentures (ODs) with either bar-clip or ball attachments. The implant, prosthesis failure, and technical complications were the outcomes analyzed in this retrospective ...
B. Chrcanovic, P. Ghiasi, J. Kisch, Liselott Lindh, C. Larsson   +4 more
semanticscholar   +1 more source

Error Analysis of a Kind of 3D Laser Ball Bar

IOP Conference Series: Materials Science and Engineering, 2019
Laser tracker instruments are used wildly in the measurement of spatial position, but the instruments have complicated structure and high manufacture cost.
Liang Xu, Yuchen Tian, Z. Lou, Kuang-Chao Fan, Li-Ding Wang, Xiao-Dong Wang, Tongqun Ren   +6 more
semanticscholar   +1 more source

Research on Morphology Detection of Metal Additive Manufacturing Process Based on Fringe Projection and Binocular Vision

Applied Sciences, 2022
This paper considers the three-dimensional (3D) shape measurement of metal parts during an additive manufacturing process in a direct energy deposition (DED) printing system with high temperature and strong light; a binocular measurement system based on ...
Min Wang, Qican Zhang, Qian Li, Zhoujie Wu, Chaowen Chen, Jin Xu, Junpeng Xue   +6 more
doaj   +1 more source

Kinematic Analysis of Triple Ball Tie-rod in Ackermann Steering and Tilting Mechanism for Tricycle Application [PDF]

E3S Web of Conferences, 2019
Nowadays, a concept of tilting three-wheel vehicle is introduced, one of which is the electric tilting tricycle to provide an alternative mode of transportation.
Pramudita Wid Wimba, Syehan Aufar, Agus Sumarsono Danardono   +2 more
doaj   +1 more source

Evaluation of Synchronous Motion in Five-axis Machining Centers With a Tilting Rotary Table

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2007
This paper proposes a new method for evaluating the synchronous inaccuracy of a translational axis and a rotational axis in five-axis controlled machining centers with a tilting rotary table.
Masaomi TSUTSUMI, Daisuke YUMIZA, Keizo UTSUMI, Ryuta SATO   +3 more
doaj   +1 more source

Comparative Study on Health Monitoring of a Marine Engine Using Multivariate Physics-Based Models and Unsupervised Data-Driven Models

Machines, 2023
The marine engine is a complex-structured multidisciplinary system that operates in a harsh environment involving high temperatures and pressures and gas/fluid/solid interactions.
Chao Fu, Xiaoxia Liang, Qian Li, Kuan Lu, Fengshou Gu, Andrew D. Ball, Zhaoli Zheng   +6 more
doaj   +1 more source

EVALUATION OF IMPLANT-ASSISTED MANDIBULAR OVERDENTURE WITH NEW METAL TO METAL INTERFACE ATTACHMENT SYSTEM (IN VITRO STUDY) [PDF]

Alexandria Dental Journal, 2020
Introduction: A well-constructed two-implant-assisted mandibular overdenture can be a successful treatment option for completely edentulous patients as it helps improving the oral function and patient satisfaction through elimination of the fear of ...
Faten Mohamed, Mohamed Gepreel, Rania Ramadan   +2 more
doaj   +1 more source

Clinical evaluation of retention and biting force in complete mandibular overdentures retained by two implants using a solitary ball and socket versus solitary bar and clip attachments: A crossover study

Mansoura Journal of Dentistry
Objectives: a clinical evaluation of retention and biting force in complete mandibular overdentures retained by two implants using a solitary ball and socket versus solitary bar and clip attachments.
Mohamed Ali Manaa, Khaled Mohamed Zahran, Hesham El-sharkawy, Ashraf Anwar Gebreel   +3 more
doaj   +1 more source