Article
Engineering, Marine
Lei Zhang, Yuanhui Wei, Yusi Deng, Han Yin, Yi Zhang, Yuchen Shang, Jianing Zhang
Summary: This paper proposes four overset mesh-based CFD self-propulsion numerical models and compares their characteristics through a Verification and Validation procedure, showing that the PID-controlled free-running SP model with a moving background and the PID-controlled surge-fixed SP model demonstrate advantages in computing resource consumption, accuracy, and efficiency.
Article
Automation & Control Systems
Darielson A. Souza, Vinicius A. de Mesquita, Laurinda L. N. Reis, Wellington A. Silva, Josias G. Batista
Summary: This paper investigates the design of LQI controllers commonly used in speed control of switched reluctance motors, optimizing parameters with metaheuristic algorithms for quicker controller adjustment. Comparing with PID controllers and selecting the best technique, it validates the effectiveness of hybrid controllers in controlling multivariable systems.
INTERNATIONAL JOURNAL OF CONTROL AUTOMATION AND SYSTEMS
(2021)
Article
Energy & Fuels
Xiaolin Duan, Pengfei Zhi, Wanlu Zhu, Haifeng Wei
Summary: This paper investigates the design of the speed control system for elevator permanent magnet synchronous traction motor, using SVPWM and direct torque control combined with fuzzy adaptive PID. The stability and reliability of this system are verified through analysis and simulation.
Article
Chemistry, Physical
R. Nanmaran, D. Balasubramaniam, P. Senthil Kumar, A. S. Vickram, A. Saravanan, S. Thanigaivel, S. Srimathi, Gayathri Rangasamy
Summary: This paper proposes a hydrogen compression model using MATLAB software, which provides the amount of hydrogen required and the compressor power for different compressor speeds. The results show that increasing the compressor speed increases the generated hydrogen volume and power requirement. Comparing with other controllers, the PID controller performs better in speed regulation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Ernesto Chavero-Navarrete, Mario Trejo-Perea, Juan Carlos Jauregui-Correa, Roberto Valentin Carrillo-Serrano, Guillermo Ronquillo-Lomeli, Jose Gabriel Rios-Moreno
Summary: This article introduces a control algorithm that automatically adjusts the PID gain values using a fuzzy logic controller (FLC) to achieve optimal response speed of the system in different wind conditions. The membership functions of the FLC are determined through measurement of wind speed, statistical analysis of wind variability, and dynamic analysis of wind path. Experimental results showed a 7% increase in electrical output and a 20% reduction in the risk of rotor damage due to vibrations or mechanical fatigue in 14 kW SHAWTs.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Multidisciplinary
Hossam Kotb, Ahmed H. Yakout, Mahmoud A. Attia, Rania A. Turky, Kareem M. AboRas
Summary: This paper proposes the use of two recent optimization techniques, Local Unimodal Sampling (LUS) and Spotted Hyena Optimizer (SHO), to optimize the cascaded PID controller for controlling the speed and reducing the torque ripples of the switched reluctance motor. The proposed algorithms have the advantage of better convergence and lower computational efforts compared to other optimization techniques. Experimental results demonstrate that the PID controller is superior to the fractional-order PID (FOPID) controller, and the SHO-based cascaded PID controller exhibits less current and torque ripples with improved speed response.
AIN SHAMS ENGINEERING JOURNAL
(2022)
Article
Engineering, Mechanical
Abhishek Shrivastava, Vijay Kumar Dalla, Kumar Abhishek
Summary: This study proposes an optimal joint and trajectory tracking control method for multi-axes space manipulator based on amnesia feedback controller. By recording trajectory tracking errors and sending them to the robot tip, the error between reference and actual trajectory is reduced.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Marine
C. L. Amoroso, A. Liverani, D. Francia, A. Ceruti
Summary: A numerical study was conducted to identify a PID control loop feedback scheme that can enhance the dynamics and seakeeping characteristics of high-speed flying yacht hulls. The study extended an existing lumped parameters model based on unsteady equations of motion and combined it with a regular ocean waves model to predict the performance of a specific engine-propelled flying yacht in calm and rough waters. The results showed the impact of using PID controllers on seakeeping performance and dynamics augmentation in dynamic systems.
Article
Engineering, Civil
James A. Bowker, Mingyi Tan, Nicholas Charles Townsend
Summary: Wave-propelled boats utilize submerged flapping foils to directly convert wave energy into propulsion. Predicting the forward speed for platforms driven solely by submerged flapping foils is challenging due to the time-varying nature, depending on the coupled responses of wave-induced hull motions and foil flapping motion. This study presents a hybrid numerical model and experimental results from a prototype ASV with tandem foils, showing good agreement in capturing the dynamics of the vessel and foils in oscillating forward speed.
IEEE JOURNAL OF OCEANIC ENGINEERING
(2021)
Article
Engineering, Chemical
Huma Khan, Shahida Khatoon, Prerna Gaur, Mohamed Abbas, Chanduveetil Ahamed Saleel, Sher Afghan Khan
Summary: Mobile robots are automatic vehicles with wheels that can be moved automatically. They are controlled by PID controllers, where kinematic modeling is used to design appropriate robots. The PID controller adjusts the motor speed based on the proportional, integral, and derivative gains. To avoid variations in robot speed due to changes in direction, the Social Spider Optimization (SSO) algorithm is utilized. This paper aims to demonstrate the effectiveness of the proposed approach in achieving precise speed control of the robot, even in the presence of disturbances and uncertainties.
Article
Engineering, Marine
W. Y. Duan, S. X. Tang, J. K. Chen
Summary: This paper proposes a fast and effective method to predict ship speed and power in head waves, using TEBEM for numerical simulation and considering the influence of waves on performance.
Article
Engineering, Aerospace
Yong Li, Zhengwu Chen
Summary: The study investigates the attenuation of spatially evolving instability Tollmien-Schlichting (T-S) waves in the boundary layer of a flat plate with zero pressure gradients using an active feedback control scheme. Results show that feedback control can effectively reduce three-dimensional disturbances in the boundary layer, demonstrating practical potential.
CHINESE JOURNAL OF AERONAUTICS
(2021)
Article
Green & Sustainable Science & Technology
Galal Al-Muthanna, Shuhua Fang, Ibrahim AL-Wesabi, Khaled Ameur, Hossam Kotb, Kareem M. M. AboRas, Hassan Z. Al Garni, Abdullahi Abubakar Mas'ud
Summary: Improving the performance of photovoltaic systems is crucial, and this article proposes a hybrid PSO-PID algorithm to address the limitations of the PSO technique under partial shadowing circumstances. The proposed approach outperforms conventional PSO and bat algorithms in terms of tracking efficiency, power ripples, and response time.
Article
Computer Science, Artificial Intelligence
R. Shanthi, S. Kalyani, P. M. Devie
Summary: This article focuses on the design of the artificial neural network with fuzzy inference system (ANFIS) for the speed control of permanent magnet synchronous motor (PMSM). The simulation results in MATLAB demonstrate the high efficiency and stability of the proposed model, exhibiting good transient efficiency and handling of uncertainties.
Article
Engineering, Electrical & Electronic
Pallav Dutta, Santanu Kumar Nayak
Summary: The study compared the results of tuning PID controller parameters based on Grey Wolf Optimization and Particle Swarm Optimization techniques, and found that the Grey Wolf Optimization method performs better in improving the dynamic performance of BLDC motors.
JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY
(2021)
Article
Engineering, Marine
Alba Ricondo, Laura Cagigal, Beatriz Perez-Diaz, Fernando J. Mendez
Summary: This research presents a site-specific metamodel based on the SWASH numerical model simulations, which can predict coastal hydrodynamic variables in a fast and efficient manner. The metamodel uses downscaled and dimensionality reduced synthetic database to accurately reproduce wave setup, wave heights associated with different frequency bands, and wave runup. This method has great potential in coastal risk assessments, early warning systems, and climate change projections.
Article
Engineering, Marine
Xiao Yu, Wangjun Ren, Bukui Zhou, Li Chen, Xiangyun Xu, Genmao Ren
Summary: This study investigated and compared the compression responses and energy absorption capacities of coral sand and silica sand at a strain rate of approximately 1000 s-1. The results showed that coral sand had significantly higher energy absorption capacity than silica sand due to its higher compressibility. The study findings suggest that using poorly graded coral sand can improve its energy absorption capacity.
Article
Engineering, Marine
Jingxi Zhang, Junmin Mou, Linying Chen, Pengfei Chen, Mengxia Li
Summary: This paper proposes a cooperative control scheme for ship formation tracking based on Model Predictive Control. A predictive observer is designed to estimate the current motion states of the leader ship using delayed motion information. Comparative simulations demonstrate the effectiveness and robustness of the proposed controller.
Article
Engineering, Marine
Yu Yao, Danni Zhong, Qijia Shi, Ji Wu, Jiangxia Li
Summary: This study proposes a 2DH numerical model based on Boussinesq equations to investigate the impact of dredging reef-flat sand on wave characteristics and wave-driven current. The model is verified through wave flume experiments and wave basin experiments, and the influences of incident wave conditions and pit morphological features on wave characteristics are examined.
Article
Engineering, Marine
Jayanta Shounda, Krishnendu Barman, Koustuv Debnath
Summary: This study investigates the double-average turbulence characteristics of combined wave-current flow over a rough bed with different spacing arrangements. The results show that a spacing ratio of p/r=4 offers the highest resistance to the flow, and the double-average Reynolds stress decreases throughout the flow depth. The advection of momentum-flux of normal stress shows an increase at the outer layer and a decrease near the bed region after wave imposition. Maximum turbulence kinetic energy production and diffusion occur at different layers. The turbulence structure is strongly anisotropic at the bottom region and near the outer layer, with a decrease in anisotropy observed with an increase in roughness spacing.
Article
Engineering, Marine
Meng Zhang, Lianghui Sun, Yaoguo Xie
Summary: The research proposes a method for online identification of wave bending and torsional moment in hull structures. For structures without large openings, the method optimizes sensor positions and establishes a mathematical model to improve accuracy. For structures with large openings, a joint dual-section monitoring method is proposed to simultaneously identify bending and torsional moments in multiple key cross sections.
Article
Engineering, Marine
Longming Chen, Shutao Li, Yeqing Chen, Dong Guo, Wanli Wei, Qiushi Yan
Summary: This study investigated the dynamic response characteristics and damage modes of pile wharves subjected to underwater explosions. The results showed that the main damaged components of the pile wharf were the piles, and inclined piles had a higher probability of moderate or more significant damage compared to vertical piles. The study also suggested that replacing inclined piles with alternative optimized structures benefits the blast resistance of pile wharves.
Article
Engineering, Marine
I. -C Kim, G. Ducrozet, V. Leroy, F. Bonnefoy, Y. Perignon, S. Bourguignon
Summary: Previous research focused on the accuracy and efficiency of short-term wave fields in specific prediction zones, while we developed algorithms for continuous wave prediction based on the practical prediction zone and discussed important time factors and strategies to reduce computational costs.
Article
Engineering, Marine
Hang Xie, Xianglin Dai, Fang Liu, Xinyu Liu
Summary: This study investigates the load characteristics of a three-dimensional stern model with pitch angle through a drop test, and reveals complex characteristics of pressure distribution near the stern shaft. The study also shows that the vibration characteristics of the load are influenced by the drop height and pitch angle, with the drop height having a greater effect on the high-frequency components.
Article
Engineering, Marine
Hangyuan Zhang, Wanli Yang, Dewen Liu, Xiaokun Geng, Wangyu Dai, Yuzhi Zhang
Summary: The deep-water bridge is more vulnerable to earthquake damage than the bridge standing in air. The larger blocking ratio has a significant impact on the added mass coefficient, which requires further comprehensive study. The generation mechanism of block effect is analyzed using numerical simulation software ANSYS Fluent. The results show that the recirculation zone with focus reduces the pressure on the back surface of the cylinder, resulting in the peak value of in-line force not occurring synchronously with the peak value of acceleration. The change in position and intensity of the recirculation zone with focus, as well as the change in water flow around the cylinder surface, are identified as the generation mechanism of the block effect, which has a 10% influence on the hydrodynamic force. The changing rule of the added mass coefficient with blocking ratio is discussed in detail, and a modification approach to the current added mass coefficient calculation method is suggested. Physical experiments are conducted to validate the modification approach, and the results show that it is accurate and can be used in further study and real practice.
Article
Engineering, Marine
Golnesa Karimi-Zindashti, Ozgur Kurc
Summary: This study examines the performance of an in-house code utilizing a deterministic vortex method on the rotation of circular and square cylinders. The results show that rotational motion reduces drag forces, suppresses fluctuating forces, and increases lift forces. The code accurately predicts vortex shedding suppression and identifies the emergence of near-field wakes in the flow over rotating square cylinders.
Article
Engineering, Marine
George Dafermos, George Zaraphonitis
Summary: The survivability of damaged ships is of great importance and the regulatory framework is constantly updated. The introduction of the probabilistic damage stability framework has rationalized the assessment procedure. Flooding simulation tools can be used to investigate the dynamic response of damaged ships.
Article
Engineering, Marine
Xuyue Chen, Xu Du, Chengkai Weng, Jin Yang, Deli Gao, Dongyu Su, Gan Wang
Summary: This paper proposes a real-time drilling parameters optimization method for offshore large-scale cluster extended reach drilling based on intelligent optimization algorithm and machine learning. By establishing a ROP model with long short-term memory neurons, and combining genetic algorithm, differential evolution algorithm, and particle swarm algorithm, the method achieves real-time optimization of drilling parameters and significantly improves the ROP.
Article
Engineering, Marine
Sung-Jae Kim, Chungkuk Jin, MooHyun Kim
Summary: This study investigates the dynamic behavior of a moored submerged floating tunnel (SFT) under tsunami-like waves through numerical simulations and sensitivity tests. The results show that design parameters significantly affect the dynamics of the SFT system and mooring tensions, with shorter-duration and higher-elevation tsunamis having a greater impact.
Article
Engineering, Marine
G. Clarindo, C. Guedes Soares
Summary: Environmental contours are constructed using the Inverse-First Order Reliability Method based on return periods. The paper proposes the use of the Burr distribution to model the marginal distribution of long-term significant wave heights. The newly implemented scheme results in different environmental contours compared to the reference approach.