Article
Automation & Control Systems
Dongwook Lee, Byeonggwan Jang, Minwoo Han, Kyung-Soo Kim
Summary: This paper presents a novel electric power steering (EPS) system controller that separates the steering feel design problem from the system stability and control performance problem, providing a unique methodology for each issue. The proposed controller, the target steering torque feedback controller, is composed of two modules to define the steering feel and control the assist motor. By disassociating nonlinear elements related to steering feel tuning from the feedback controller, the conventional EPS controller's difficulties are overcome. The design includes rack-force-based steering feel generation logic and criteria for steering torque feedback controller in the frequency domain to ensure robust stability, tracking performance, and noise attenuation.
CONTROL ENGINEERING PRACTICE
(2021)
Article
Computer Science, Artificial Intelligence
Kittinan Wansasueb, Sorasak Panmanee, Natee Panagant, Nantiwat Pholdee, Sujin Bureerat, Ali Riza Yildiz
Summary: This paper proposes a new hybrid algorithm for aeroelastic optimization of aircraft wings and demonstrates its superior performance through various tests.
KNOWLEDGE-BASED SYSTEMS
(2022)
Article
Chemistry, Multidisciplinary
Rui Chen, Yifan Shao, Yi Zhou, Yongdi Dang, Hongguang Dong, Sen Zhang, Yubo Wang, Jian Chen, Bing-Feng Ju, Yungui Ma
Summary: In this study, a semisolid micromechanical beam steering system based on micrometa-lens arrays (MMLAs) is demonstrated. It is operated by manipulating the probe beam over two sets of decentered MMLAs potentially driven by high-speed piezo-electric motors. The system optimizes overall technical parameters with small f-numbers, well-corrected aberration, and easy lateral reproduction of micrometa-lenses. As a proof-of-concept, the device achieves diffraction-limited resolution within a large field of view of 30 degrees X 30 degrees and shows potential in light detection and ranging applications.
Article
Automation & Control Systems
Ahmed Ktari, Mohamed El Mansori
Summary: This paper presents an intelligent approach for modeling and optimization of filling system design in the sand casting process of aluminum alloy, combining finite element method, artificial neural networks, and genetic algorithm. The proposed method was found to be reliable and robust, accurately predicting the values of melt flow behavior indexes.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Agronomy
Baocheng Zhou, Xin Su, Hongjun Yu, Wentian Guo, Qing Zhang
Summary: With the development of agricultural mechanization and information technology, automatic navigation tractors are becoming more common. This study proposes an adaptive time-domain parameter combined with model predictive control (MPC) to improve the accuracy and real-time performance of path tracking control for articulated steering tractors. The proposed algorithm reduces lateral deviations and maintains tracking stability in both simulations and real tractor tests.
Article
Engineering, Multidisciplinary
Pan Zou, Jianxin (Roger) Jiao, Feng Zhou
Summary: This paper proposes a twofold update quantum-inspired genetic algorithm to solve combinatorial optimization problems in engineering system design. The method outperforms traditional techniques and exhibits better robustness and efficiency.
JOURNAL OF ENGINEERING DESIGN
(2023)
Article
Computer Science, Artificial Intelligence
Ao Liu, Peng Li, Xudong Deng, Liang Ren
Summary: This paper investigates the reasons why the firefly algorithm (FA) gets stuck in local optima and proposes an improved version, IFA. The empirical results show that IFA can strike a good balance between global exploration and local exploitation, providing the best solutions for most global optimization problems.
CONNECTION SCIENCE
(2021)
Article
Thermodynamics
Shanshuo Xing, Jili Zhang
Summary: The authors propose a hybrid optimisation method for a chiller-pump system in parallel-arranged systems with non-identical chillers and pumps. The method achieves overall minimum energy consumption through trade-off between chillers and pumps.
APPLIED THERMAL ENGINEERING
(2022)
Article
Mathematics
Martin Straka
Summary: This article discusses two methods for calculating the location of a point on a surface, one using traditional iterative methods and the other using an author-created expert system. The results show that high-precision location solutions can be obtained through the 32nd and 6th iterations respectively.
Article
Engineering, Marine
Zhixun Yang, Jun Yan, Svein Saevik, Qingzhen Lu, Naiquan Ye, Jinlong Chen, Qianjin Yue
Summary: This study established an approximate model to achieve an optimised design of a dynamic umbilical by considering both local and global parameters simultaneously, improving computational efficiency and fatigue life significantly.
Article
Automation & Control Systems
Chenming Li, Han Zhao, Shengchao Zhen, Ye-Hwa Chen
Summary: In this article, a high-order control is applied to a dynamical system with uncertainty, where the uncertain part is described in a fuzzy aspect and systems are uniformly bounded and ultimately bounded with a deterministic controller based on Lyapunov theory. Noncooperative game theory is used to optimize parameters and D-operation is proposed for uncertainty related to fuzzy numbers. Finally, numerical simulations of a steering-by-wire system are conducted for verification.
IEEE TRANSACTIONS ON CYBERNETICS
(2022)
Article
Automation & Control Systems
Bing Hua, Rui Ni, Mohong Zheng, Yunhua Wu, Zhiming Chen
Summary: By designing a control strategy based on cooperative game, the singularity problem of control moment gyroscope (CMG) system is solved, allowing the system to quickly escape singularity and achieve optimal strategy with minimized energy consumption and angular momentum. Simulation results prove the feasibility of the CMG system steering law based on cooperative game.
JOURNAL OF SYSTEMS ENGINEERING AND ELECTRONICS
(2023)
Article
Geosciences, Multidisciplinary
Dong Kangxing, Zhao Xinrui, Lu Qiuyu, Liu Wei, Chang Siyuan
Summary: This paper uses the Grey relational algorithm to determine the optimal connected injection-production well group by studying the dynamic relationship between oil and water wells. It also proposes a Sparrow search algorithm optimisation model based on Sine mapping to specifically predict water injection. The new algorithm, Sine-SSA-BP, improves the predictive accuracy of water injection volume compared to the original BP algorithm.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Mathematics
Alessandro Niccolai, Francesco Grimaccia, Marco Mussetta, Riccardo Zich, Alessandro Gandelli
Summary: Reflectarray antennas are low-profile high-gain systems widely used in the aerospace industry. The design complexity and the need for high scanning capabilities have led to the development of an optimization environment that can be applied with evolutionary optimization algorithms.
Article
Engineering, Marine
Guojun Zhu, Jianjun Feng, Ping Li, Zhaoning Wang, Guangkuan Wu, Xingqi Luo
Summary: A hydrofoil optimisation method is proposed in this study, which combines deep belief network (DBN) and non-dominated sorting genetic algorithm II (NSGA-II). The method reduces the number of objective functions through performance distance formula and establishes the response relationship between geometric parameters and hydrodynamic performance using Multi-DBN. The results show that the optimized hydrofoil has better performance than the initial design at different attack angles, with a maximum improvement of 10.63% in lift-drag ratio and 11.44% in minimum pressure coefficients within the range of 0 to 14 degrees.