Wei Han

Nanchang University

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Xichao Su

Naval Aeronautical and Astronautical University

Jie Liu

Wuhan University of Technology

Rongwei Cui

Naval Aeronautical and Astronautical University

Fang Guo

Shenzhen University

Da Zhao Yu

Naval Aeronautical and Astronautical University

Xinwei Wang

Dalian University of Technology

Xiao Hong Zheng

Changsha University of Science and Technology

Haijun Peng

Dalian University of Technology

Yong Zhang

Shenzhen Institutes of Advanced Technology

Jie Liu

Shandong University

Cooperative Institutions

Naval Aeronautical and Astronautical University

Civil Aviation University of China

Chinese Academy of Sciences

National University of Defense Technology

Hong Kong Polytechnic University

PLA Army Engineering University

Tsinghua University

Sichuan University

Northwestern Polytechnical University

Zhengzhou University

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Optimization for the Storage Management and Job Scheduling Based on Expert System

Zeng Ming-ru Zong Huliang Wei Han

To improve the efficiency of automated storage and retrieval system, expert systems will be used in automated storage and retrieval system use management and job scheduling optimization. By analyzing the experience of experts in the field based on the knowledge base of production rules, the application of forward inference engine designed the flow of reasoning. The experimental results show that, in the automated storage and retrieval system, the use of expert systems cargo space management and job scheduling optimization, can effectively improve the operation of automated storage and retrieval system efficiency.

10.1109/ssme.2009.55

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Citations (2)

Flap motion of helicopter rotors with novel, dynamic stall model

Open Physics (2016)

Wei Han Jie Liu Chun Liu Lei Chen Xichao Su

Abstract In this paper, a nonlinear flapping equation for large inflow angles and flap angles is established by analyzing the aerodynamics of helicopter blade elements. In order to obtain a generalized flap equation, the Snel stall model was first applied to determine the lift coefficient of the helicopter rotor. A simulation experiment for specific airfoils was then conducted to verify the effectiveness of the Snel stall model as it applies to helicopters. Results show that the model requires no extraneous parameters compared to the traditional stall model and is highly accurate and practically applicable. Based on the model, the relationship between the flapping angle and the angle of attack was analyzed, as well as the advance ratio under the dynamic stall state.

Stall (fluid mechanics)

Flapping

Helicopter rotor

Inflow

10.1515/phys-2016-0019

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Citations (1)

A heuristic solution framework for the resource-constrained multi-aircraft scheduling problem with transfer of resources and aircraft

Expert Systems with Applications (2023)

Xichao Su Rongwei Cui Changjiu Li Wei Han Jie Liu

Deadline-monotonic scheduling

Cockpit

10.1016/j.eswa.2023.120430

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Citations (3)

Automated Sortie Scheduling Optimization for Fixed-Wing Unmanned Carrier Aircraft and Unmanned Carrier Helicopter Mixed Fleet Based on Offshore Platform

Drones (2022)

Zixuan Liu Wei Han Yu Wu Xichao Su Fang Guo

Optimizing naval aircraft deck sortie scheduling is important for improving the sortie efficiency of naval aircraft groups. It is also an important link in realizing the automated scheduling of aircraft carriers. Firstly, a single-aircraft surface transit path library was constructed. This paper used the improved A* algorithm and the optimal control deck path planning algorithm to construct the transit path library between the deck parking position and take-off position, or between warmable and non-warmable parking positions. Secondly, a mathematical optimization model was constructed for the sortie scheduling of a mixed fleet of fixed-wing carrier aircraft and carrier helicopters. The model took the maximum sortie time of the fleet and taxiing time of the fleet of fixed-wing aircraft as the optimization objectives, and considered the process flow, spatial, and resource constraints. Thirdly, a discretized improved whale optimization algorithm (IWOA) was designed to solve the problem. To improve the optimization-seeking capability of the algorithm, we discretized the algorithm, optimized its coding method, and introduced pre-constraints, learning factors, parameter improvements, and population restart. Finally, we set up various cases and proposed a new strategy for simulation experiments: these simulations verified the validity of the model, the excellent optimization performance of the IWOA, and the superiority of the sortie strategy. The research in this study will help to implement automated aircraft carrier scheduling.

Crew scheduling

Takeoff

10.3390/drones6120375

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Citations (3)

Dynamic Fault Tree Based on Weibull Distribution

Advanced materials research (2011)

Wei Gang Guo Wei Han Shu Yan Liu

The fault tree analysis is a widely used method for evaluation of systems reliability and safety. Dynamic fault tree (DFT) extend traditional FT by defining additional gates called dynamic gates to model these complex interactions. Markov models are used in solving dynamic gates. However, state space becomes too large for calculation with Markov models when the number of gate inputs increases. In addition, Markov model is applicable for only exponential failure and repair distributions. But in engineering, the failure mode is mostly obeyed to weibull distribution for mechanism and electronic units. Combined the weibull distribution and Markov model, this paper presents dynamic fault tree quantitative analysis method based on weibull distribution.

10.4028/www.scientific.net/amr.308-310.1322

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Citations (1)

A Robust Scheduling Optimization Method for Flight Deck Operations of Aircraft Carrier With Ternary Interval Durations

IEEE Access (2018)

Xichao Su Wei Han Yu Wu Yong Zhang Jingyu Song

The sortie and recovery operations of the carrier-based aircraft fleet are carried out in a cyclic mode, and there are uncertainties during the flight deck operations, which is the main factor that influences the sustainability of cyclic operations. The robust scheduling problem for flight deck operations (RSPFDO) with uncertain duration is studied in this paper. First, the robust scheduling model of flight deck operations with ternary interval durations is established. In this model, the precedence and resource constraints including personnel, equipment, workstation space, and supply resource are taken into account, and the uncertain duration is modeled as a ternary interval number. Second, to make a proactive plan, serial schedule generation scheme is used to generate baseline schedules, and a robust personnel allocation scheme is designed. In terms of executing schedules, a pre-constrained scheduling policy is proposed to evaluate the ternary interval of makespan. Third, a double-population and self-adaptive differential evolution (DSDE) algorithm is presented to optimize the robust plan, which is embedded in a population-based double justification scheme, self-adaptive selection of mutation and crossover factors, and a chaotic catastrophe operator based on the scouts mode of artificial bee colony algorithm. The validity of the established model and the superiority of the DSDE algorithm are verified by simulations with mission cases and algorithm comparison. The results demonstrate that the proposed robust scheduling method can effectively improve the robustness of the flight deck operations.

Cockpit

Robustness

10.1109/access.2018.2879503

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Citations (8)

Computation of Aerial Towed Cable Aerodynamic Performances with Large Eddy Simulation

Applied Mechanics and Materials (2011)

Wei Han Xiao Wei Kang Yun Liang Wang Xiao Hong Zheng

The dynamics characteristic of aerial towed cable has been investigated with many models. Because of the coupling between the components of the towed cable system, the dynamics of the towed cable is complex and nonlinear. Though the aerodynamic performances of cable is studied for a long time, the results are quiet different with researchers. The ideal method to obtain the aerodynamic forces is to simulate the flow structure around the towed cable.The purposes of this paper are to simulate the flow field of the towed cable with the different inclined angles by using Large Eddy Simulation (LES) with sub-grid scale model of Smagorinsky-Lily and to study the variation of the aerodynamic forces and its influences on flow structure. The results show that the LES can predict the flow structure of the cable reasonably.

Detached-Eddy Simulation

Aerodynamic force

Large-Eddy Simulation

Scale model

Unstructured grid

10.4028/www.scientific.net/amm.105-107.606

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The Effects of Exfoliation Corrosion on Upper Wing Skins Structural Integrity

Applied Mechanics and Materials (2012)

Da Zhao Yu Wei Han Shu Yan Liu

Based on initial discontinuity state (IDS) of material, this paper presents a preliminary analytical model which was developed to evaluate the effect of exfoliation corrosion on the residual fatigue life of upper wing skins. A life prediction was then carried out using constant amplitude compression dominated loading for various exfoliation corrosion levels by AFGROW, and the prediction agreed reasonably with the available test data. The result suggest that exfoliation can be treated as a process zone located initially at a surface, and then at the base of an evolving general stress concentration representing the loss of material in the exfoliation region. The major effect of the exfoliation corrosion on fatigue life is to cause a dramatic reduction in life with small corrosion depths, and most of the fatigue effect is associated with the introduction of small pits, rather than more general stress concentration associated with the bulk of the exfoliation attack. But the effect of pit on fatigue life is gradually reduced with increasing pit size. A pit with a constant depth can be applied to the model described in this paper for long exposure structure. A preliminary recommendation for the pit depth is about 0.3mm for LY12CZ.

Exfoliation joint

Discontinuity (linguistics)

10.4028/www.scientific.net/amm.151.19

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Carrier Landing Flight Path Angle Control via Higher-Order Sliding Mode

Junfeng Chen Wei Han Guang Pu Xu

The accuracy of flight path angle is significant in carrier landing, thus the control of flight path angle is studied in this paper. A flight control system is designed via higher-order sliding mode which is bounded, continuously time-dependent, and provides higher accuracy than standard sliding mode. The robust exact differentiator is used to calculate the higher-order derivatives of sliding mode manifold. Based on aforementioned system, the automatic power compensate system is designed via PID controller. The simulation results are presented.

Differentiator

Mode (computer interface)

Manifold (fluid mechanics)

10.1109/ihmsc.2014.138

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Citations (2)

A Proactive Robust Scheduling Method for Aircraft Carrier Flight Deck Operations with Stochastic Durations

Complexity (2018)

Xichao Su Wei Han Yu Wu Yong Zhang Jie Liu

The operations on the aircraft carrier flight deck are carried out in a time‐critical and resource‐constrained environment with uncertainty, and it is of great significance to optimize the makespan and obtain a robust schedule and resource allocation plan for a greater sortie generation capacity and better operational management of an aircraft carrier. In this paper, a proactive robust optimization method for flight deck scheduling with stochastic operation durations is proposed. Firstly, an operation on node‐flow (OONF) network is adopted to model the precedence relationships of multi‐aircraft operations, and resource constraints categorized into personnel, support equipment, workstation space, and supply resource are taken into consideration. On this basis, a mathematical model of the robust scheduling problem for flight deck operation (RSPFDO) is established, and the goal is to maximize the probability of completing within the limitative makespan (PCLM) and minimize the weighted sum of expected makespan and variance of makespan (IRM). Then, in terms of proactive planning, both serial and parallel schedule generation schemes for baseline schedule and robust personnel allocation scheme and equipment allocation adjustment scheme for resource allocation are designed. In terms of executing schedules, an RSPFDO‐oriented preconstraint scheduling policy ( C PC ) is proposed. To optimize the baseline schedule and resource allocation, a hybrid teaching‐learning‐based optimization (HTLBO) algorithm is designed which integrates differential evolution operators, peak crossover operator, and learning‐automata‐based adaptive variable neighborhood search strategy. Simulation results shows that the HTLBO algorithm outperforms both some other state‐of‐the‐art algorithms for deterministic cases and some existing algorithms for stochastic project scheduling, and the robustness of the flight deck operations can be improved with the proposed resource allocation schemes and C PC policy.

Cockpit

Ordinal optimization

10.1155/2018/6932985

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Citations (15)