Neural network based boundary control of a vibrating string system with input deadzone
Sign Up to like & getrecommendations! Published in 2018 at "Neurocomputing"
DOI: 10.1016/j.neucom.2017.09.050
Abstract: Abstract In this paper, a boundary control scheme is developed for a vibrating flexible string system subject to input deadzone and external disturbance. First, a basic boundary control scheme is proposed to suppress the string’s… read more here.
Keywords: control; string system; neural network; input deadzone ... See more keywords
Hybrid Interval Type-2 Fuzzy PID+I Controller for a Multi-DOF Oilwell Drill-String System
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Access"
DOI: 10.1109/access.2022.3185021
Abstract: The control of multibody drill-string systems is not easy and designing such systems is considered challenging because of the difficulty in the dynamic analysis of its nonlinear characteristics and parametric uncertainties. An optimal hybrid interval… read more here.
Keywords: system; drill string; control; type fuzzy ... See more keywords
Adaptive Control of a Flexible String System With Input Hysteresis
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Transactions on Control Systems Technology"
DOI: 10.1109/tcst.2017.2669158
Abstract: In this brief, a vibration suppression scheme is investigated for a flexible string system with input hysteresis. The input hysteresis is formulated as a linear desired input and a “disturbance-like” term, whose unknown bound is… read more here.
Keywords: system; control; string system; input hysteresis ... See more keywords
Improving Rate-of-Penetration and Reducing State Fluctuation of Drill-String System Based on Multiobjective Optimization
Sign Up to like & getrecommendations! Published in 2025 at "IEEE Transactions on Industrial Informatics"
DOI: 10.1109/tii.2025.3567393
Abstract: This article is concerned with the balance between improving rate-of-penetration and suppressing drill-string vibrations by optimizing weight-on-bit and rotational speed. The main contribution of this article lies in three points. First, due to the lack… read more here.
Keywords: drill string; fluctuation drill; rate penetration; string system ... See more keywords
Axial vibration characterization analysis of drilling rig's drilling-string system with ABAQUS and MATLAB co-simulation
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DOI: 10.1142/s0219455427501070
Abstract: Complex geological layers lead to unstable drilling quality and frequent drilling string failures in pile foundation construction. To address this, this paper studied the axial vibration characteristics of the drill-string system in miniature steel-pipe-pile rigs… read more here.
Keywords: system; axial vibration; drilling string; simulation ... See more keywords
Non-Linear Dynamic Analysis of Drill String System with Fluid-Structure Interaction
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DOI: 10.3390/app11199047
Abstract: In this research, the non-linear dynamics of the drill string system model, considering the influence of fluid—structure coupling and the effect of support stiffness, are investigated. Using Galerkin’s method, the equation of motion is discretized… read more here.
Keywords: system; string system; non linear; drill string ... See more keywords