Results 21 to 30 of about 42,845 (360)
An impedance approach to reduce the contact-instability whilst drilling with active heave compensation [PDF]
, 2012 The bit-bounce, or contact-instability, phenomenon which occurs in the drill string suspended from a floating vessel with an active drill string compensator to maintain a steady weight on the drill bit is investigated.
Dunnigan, Mathew Walter, Hatleskog, Jan
core +1 more source
Bond Graph Modeling and Simulation of Hybrid Piezo-Flexural-Hydraulic Actuator
Engineering ProceedingsIn this study, a hybrid piezo-flexural-hydraulic actuator is modeled and simulated using bond graph methodology. The hybrid actuator comprises piezoelectric stack actuator, mechanical flexural amplifier, and hydraulic piston actuator.
Rudraksha Kelkar +3 more
doaj +1 more source
IEEE Access, 2018 This paper gives the kinematic description and mathematical dynamic model of a three-degrees-of-freedom manipulator, including hydraulic actuator dynamics, and then proposes a disturbance observer-based robust control scheme for the position and torque ...
To Xuan Dinh +3 more
doaj +1 more source
Control system modeling of hydraulic actuator with compressible fluid flow [PDF]
FME Transactions, 2012 The paper treats Riemann's partial differential equations in the form (1), where variable μ is defined by relation (2). Corresponding boundary conditions are defined in various forms, such as boundary conditions of pressure and flow on the fixed and ...
Janković Jovan J. +2 more
doaj
Design and Control of a Linear Rotary Electro-Hydraulic Servo Drive Unit
Applied Sciences, 2023 In this paper, a new solution for an electro-hydraulic servo drive is proposed, which consists of two electro-hydraulic servo drives: one with a hydraulic cylinder and one with a hydraulic rotary motor.
Andrzej Milecki +2 more
doaj +1 more source
A Spatiotemporal Domain-Coupled Clustering Method for Performance Prediction of Cluster Systems
ActuatorsThe performance prediction of the Five-hundred-meter Aperture Spherical radio Telescope (FAST) project represents one of the primary challenges faced by the system.
Yirui Zhang +4 more
doaj +1 more source
Radiator deployment actuator Patent [PDF]
, 1971 Hydraulic actuator design for space deployment of heat ...
Kolstee, H. M., Simpson, W. E.
core +1 more source
Novel Functional Materials via 3D Printing by Vat Photopolymerization
Advanced Functional Materials, EarlyView.This Perspective systematically analyzes strategies for incorporating functionalities into 3D‐printed materials via Vat Photopolymerization (VP). It explores the spectrum of achievable functionalities in recently reported novel materials—such as conductive, energy‐storing, biodegradable, stimuli‐responsive, self‐healing, shape‐memory, biomaterials, and
Sergey S. Nechausov +3 more
wiley +1 more source
Journal of Low Frequency Noise, Vibration and Active Control, 2021 This study investigates the vibration control issue of active suspension systems. Unlike previous results that neglect the actuator dynamics or consider the impractical symmetrical hydraulic cylinder model, this paper incorporates more reasonable ...
Dingxuan Zhao +4 more
doaj +1 more source
Hydraulic Actuator System for Rotor Control [PDF]
, 1991 In the last ten years, several different types of actuators were developed and fabricated for active control of rotors. A special hydraulic actuator system capable of generating high forces to rotating shafts via conventional bearings is addressed.
Althaus, Josef, Ulbrich, Heinz
core +1 more source