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Analysis of the Influence of Downhole Drill String Vibration on Wellbore Stability

open access: yesMachines, 2023
Most studies related to aspects of wellbore stability, such as wellbore breakage, block dropping, and wellbore expansion, revolve around the physicochemical interaction between drilling fluid and surrounding rock, but relevant studies show that drill ...
Yonggang Shan   +4 more
doaj   +3 more sources

Safe Predictor-Feedback CACC with V2X-Aware Adaptive Spacing for Heterogeneous Vehicle Platoons [PDF]

open access: yesSensors
Vehicle-to-everything (V2X)-enabled cooperative adaptive cruise control (CACC) is a key technology for improving both traffic efficiency and driving safety in vehicle-platooning scenarios.
Jaehyeon Shin, Junhyeok An, Sungjin Lee
doaj   +2 more sources

String Stability Analysis and Design Guidelines for PD Controllers in Adaptive Cruise Control Systems [PDF]

open access: yesSensors
This paper proposes a practical design guideline for selecting control parameters in adaptive cruise control (ACC) systems to ensure both individual vehicle stability and string stability in vehicle following systems with homogeneous longitudinal ...
Kangjun Lee, Chanhwa Lee
doaj   +2 more sources

Stability Analysis of the Vehicular Platoon with Sensing Delay and Communication Delay: CTCR Paradigm via Dixon Resultant

open access: yesApplied Sciences, 2023
For the vehicular platoon consisting of connected automotive vehicles, time delays degrade both the internal stability and string stability. In this study, the internal stability and string stability of the vehicular platoon suffering from sensing delay ...
Xu Zhu   +3 more
doaj   +1 more source

Exploring the Role of Sampling Time in String Stabilization for Platooning: An Experimental Case Study

open access: yesMathematics, 2023
In this article, we investigate the behavior of vehicle platoons operating in a predecessor-following configuration, implemented through sampled-data control systems.
Felipe I. Villenas   +2 more
doaj   +1 more source

A Novel Path Planning Algorithm for Truck Platooning Using V2V Communication

open access: yesSensors, 2020
In truck platooning, the leading vehicle is driven manually, and the following vehicles run by autonomous driving, with the short inter-vehicle distance between trucks.
Yongki Lee   +4 more
doaj   +1 more source

Alleviation of traffic congestion using distributed autonomous control in mixed traffic flow of vehicles with adaptive cruise control and human-driven vehicles

open access: yesNihon Kikai Gakkai ronbunshu, 2022
The number of vehicles equipped with adaptive cruise control (ACC) is increasing, reflecting a trend toward autonomous vehicle development. It is expected that ACC systems will improve traffic in terms of string stability (i.e., attenuation of spacing ...
Masahiko KURISHIGE   +2 more
doaj   +1 more source

PL-TOON: A Low-Cost Experimental Platform for Teaching and Research on Decentralized Cooperative Control

open access: yesSensors, 2021
In this paper, we present the development of a low-cost multi-agent system experimental platform for teaching, and research purposes. The platform consists of train-like autonomous agents equipped with local speed estimation, distance sensing to their ...
Andrés A. Peters   +4 more
doaj   +1 more source

Potential Function-Based String Stable Controller for Heavy Road Vehicle Platoons

open access: yesIEEE Access, 2021
Heavy Commercial Road Vehicle (HCRV) platooning is a promising solution to meet increasing freight transportation demands. This paper applies the concept of Artificial Potential Functions (APF) to design a string stable controller, viz., Potential ...
K. B. Devika   +2 more
doaj   +1 more source

Nonlinear Buckling Analysis and Optimization Design of the Y-Type Composite Insulator String

open access: yesAdvances in Civil Engineering, 2022
Under the action of extreme wind load, the overhead transmission line will lead to the fracture of the traditional V-type insulator string, which greatly affects the safety of the power system.
Hua Bao   +5 more
doaj   +1 more source

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