Results 31 to 40 of about 35,267 (307)

Investigating wind turbine dynamic transient loads using contactless shaft torque measurements

open access: yesThe Journal of Engineering, 2019
The wind industry is showing increasing awareness about the importance of long-term direct shaft mechanical torque measurements to fully understand wind turbine (WT) dynamics, adopt proactive solutions for extreme load mitigation and enhance condition ...
Donatella Zappalá   +3 more
doaj   +1 more source

Flux observer algorithms for direct torque control of brushless doubly-fed reluctance machines [PDF]

open access: yes, 2009
Direct Torque Control (DTC) has been extensively researched and applied to most AC machines during the last two decades. Its first application to the Brushless Doubly-Fed Reluctance Machine (BDFRM), a promising cost-effective candidate for drive and ...
Chaal, Hamza, Jovanovic, Milutin
core   +2 more sources

Diagnosis of the Misaligned Faults of the Vertical Test Instrument of High-Precision Industrial Robot Reducer

open access: yesShock and Vibration, 2021
High-precision reducer is the core component of industrial robots. In order to achieve the comprehensive performance testing of precision reducers, an instrument with a vertical layout and a cylindrical structure is designed.
Zhen Yu, Yuan Zhang
doaj   +1 more source

A review of using the force/torque sensor in robotics application [PDF]

open access: yes, 2020
Nowadays, force/torque sensors ubiquitous in the robotics field. Most of the robots on the assembly line use a force/torque sensor in a complex assembly process.
Abdul Manaf, Mohamad Shukri   +3 more
core  

Physical and Chemical Roles of Metalworking Fluids in a Vibration-Assisted Tapping System

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2007
A vibration-assisted tapping system has been developed in which a piezoelectric-zirconate-titanate (PZT) oscillator applies small-amplitude vibrations to a workpiece and a torque transducer measures the time-evolving torque during the tapping process. To
Takeshi NOGAMI, Ken NAKANO
doaj   +1 more source

SAW torque transducers for disturbance rejection and tracking control of multi-inertia servo-drive systems [PDF]

open access: yes, 2004
The paper proposes a resonance ratio control (RRC) technique for the coordinated motion control of multi-inertia mechanical systems, based on the measurement of shaft torque via a SAW-based torque sensor. Furthermore, a new controller structure, RRC plus
Bingham, C M   +2 more
core   +1 more source

A combined loading transducer for calculating the bending moment and torque in a slender circular beam using the minimum numbers of strain gauges, strain grids, and measurement channels

open access: yesInternational Journal of Distributed Sensor Networks, 2020
The purpose of this work is to develop a new methodology that uses the minimum numbers of strain gauges, strain grids, and measurement channels to calculate the bending moment and torque in a slender circular beam under combined loading from measured ...
Bernard J Socha   +2 more
doaj   +1 more source

Design of Unimorph Type 3DOF Ultrasonic Motor

open access: yesApplied Sciences, 2020
A new design of 3 degrees of freedom (DOF) piezoelectric ultrasonic motor (USM) is introduced in this paper. The concept of this design is to incorporate a spherical rotor between two piezoelectric transducers.
Vytautas Jūrėnas   +2 more
doaj   +1 more source

An in vitro study evaluating the efficacy of a novel mount with torque control designed to tighten Osstell® transducers

open access: yesClinical and Experimental Dental Research, 2023
Objectives To evaluate the efficacy of a novel mount with torque control for tightening of Osstell® transducers and to determine the reliability of recorded ISQ measurements from implants placed in various bone densities.
David Naughton   +2 more
doaj   +1 more source

Evaluation of Axial Preload in Different-Frequency Smart Bolts by Laser Ultrasound

open access: yesSensors, 2022
We report here on a laser ultrasonic system to indirectly evaluate the preload force of different-frequency piezoelectric bolts. This newly developed system enables us to achieve the goal of non-contact excitation and synchronously collects the laser ...
Guanpin Ren   +5 more
doaj   +1 more source

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