Yulong Lan

Nanjing University of Aeronautics and Astronautics

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Co-Authors

Guangku Xue

Craft Group (China)

Bangyi Li

University of South China

Andrew Mogga

Albany Medical Center Hospital

Erin Johnson

University of Utah

Mai S. Elsheikh

National Research Centre

Manjari Tripathi

All India Institute of Medical Sciences

Ashish Upadhyay

Johns Hopkins University

Yasmin Khakoo

Cornell University

Agnies M. van Eeghen

Emma Kinderziekenhuis

Katsuhiro Kobayashi

Okayama University Hospital

Cooperative Institutions

All India Institute of Medical Sciences

Texas Children's Hospital

Baylor College of Medicine

Cincinnati Children's Hospital Medical Center

Boston Children's Hospital

University of Cape Town

Craft Group (China)

Okayama University Hospital

Children's Mercy Hospital

All India Institute of Medical Sciences Bhopal

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Research on spindle fault diagnosis technology of six- axis five-linkage Bridge CNC machine tool

Yulong Lan Guangku Xue Xifeng Fan Shiyong Liu Yingbai Xie

The electric spindle is the executive body of the numerical control products, because of its highly integrated structure, the industry has not yet summarized a scientific and efficient method of fault diagnosis, resulting in its fault diagnosis thinking mode and long processing cycle, the normal processing of the product is seriously affected. Taking the fault diagnosis process of Fisher Electric spindle used in a six-axis five-linkage bridge CNC machine tool as an example, this paper studies and summarizes the process of distinguishing and analyzing the typical fault causes by using the Datsan method, this paper presents a method for rapid diagnosis of machine tool spindle faults, which can be used for reference by engineers and technicians in dealing with similar equipment faults.

Bridge (graph theory)

Machine tool

Linkage (software)

10.1109/icmimt52186.2021.9476187

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Citations (1)

Aircraft Pipe Geometric Feature Modeling and Error Compensation Based on Assembly Constraints

Research Square (Research Square) (2020)

Yulong Lan Songlin Chen Wenxiang Gao Bangyi Li Mutian Tang

Abstract An error compensation method based on the assembly constraints of aircraft pipe is proposed for solving the problem of frequent failures caused by high assembly stress in the actual assembly process. Firstly, the pipe assembly process’ geometric modeling is carried out using geometric modeling method, and a new modeling method based on axis vector is proposed. On this basis, the Rodrigues formula was used to establish a pipe space pose calculation model based on actual assembly conditions. Then, the assembly constraints are analyzed, and the key constraint features are identified based on the pipe assembly requirements. Subsequently, the pipe assembly scenarios under different constraint forms are analyzed, and the pipe error compensation methods under a single constraint and associated constraint are respectively proposed. Finally, a typical flaring pipe is selected for the test; the pipe assembly error compensation calculation and the pipe installation air tightness test are carried out respectively. The results show that the proposed method could effectively realize the theoretical space pose adjustment and the pipe parameter compensation, and the air tightness of the compensated pipe is better than that of the uncompensated one.

Feature (linguistics)

10.21203/rs.3.rs-116062/v1

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Table of Contents

Pediatric Neurology (2023)

Andrew Knox Nancy Bass Yasmin Khakoo Roberta Solazzi Giuliana Nanni

Table (database)

10.1016/s0887-8994(23)00295-3

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Research on Position Keeping Technology of FIVE-axis CNC Machine Tool under Abnormal State in Fixed Angle Machining of Swing Shaft

Guangku Xue Yulong Lan Chun Liu Xuemeng Xia Zhongping Huang

The swing shaft of five-axis CNC machine tool is usually used for fixed angle machining of products. The reliability of the position state of the swing shaft directly affects the quality of product processing. In this paper, aiming at the problem that the servo position changes in the abnormal condition during the fixed swing Angle machining of the B axis of a five-axis CNC machine tool affect the machining quality of the product, a set of methods and devices to solve the above problems are proposed and designed from the aspects of mechanical, electrical and hydraulic system analysis, and realize the maintenance of the angle position of the product under the abnormal state of the fixed swing angle machining of the machine tool. So that, the product processing quality is guaranteed.

Machine tool

Position (finance)

Servomechanism

10.1109/icmimt59138.2023.10199617

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Research on precision picking technology of Aircraft Assembly Standard Parts

Yulong Lan Guangku Xue Ying Xie Liu Shi-yong Jie Li

In the aviation manufacturing industry, the single aircraft assembly process needs thousands of standard parts, more than one hundred thousand, and tens of thousands of assembly processes, the product assembly process used in the standard parts specifications, the number of traceability has strict requirements. However, the current method of manual selection is difficult to guarantee the accuracy of specifications and quantities in the process of standard parts selection. Once the specifications and quantities of standard parts used are wrong, it is easy to cause changes in the load-carrying capacity of the whole machine or to produce redundant materials, finally, the safety, fatigue life and stability of the aircraft are affected. Aiming at the above-mentioned outstanding problems, in the process of automatic selection of standard parts, the precise selection of specification and quantity of standard parts is realized in the process of automatic selection of standard parts for aircraft assembly, ensure the quality of product assembly.

Traceability

10.1109/icmimt52186.2021.9476145

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Game Theoretical Approach for Customer Driven Job Scheduling Considering Carbon Emissions In Service-Oriented Manufacturing

Yulong Lan Changle Tian Bangyi Li Jinbu Fan Chun Liu

This paper presents a novel scheduling solution for optimizing the carbon emissions and makespan of each job from different customers in service-oriented manufacturing environments. The paper first presents a new job scheduling problem considering carbon emissions by distinguishing the concepts and requirements of job scheduling in the service-oriented manufacturing environment from those in the traditional manufacturing environment. Secondly, a game-theory mathematical model is constructed to deal with this new job scheduling problem. In this model, the scheduling problem is formulated as an N-person non-cooperative game with complete information, where the players refer to the jobs submitted by different customers, a set of strategies of each player refer to machines in a service-oriented manufacturing workshop, and the payoffs refer to the makespan and carbon emissions of each job. Therefore, obtaining the optimal scheduling results is determined by the Nash Equilibrium (NE) point of this game. To find the NE point, a genetic algorithm combining local search is developed to effectively solve the above model. Finally, simulation case is designed and the results demonstrate the feasibility of the approach.

Job shop

10.1109/icmimt55556.2022.9845264

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Capacity planning for a twin fab

Jiankun Chen Yang-Chih Fan J.Y. Wang T. Lin S.H. Leea

A capacity planning system (CPS) is developed for a twin fab based on the assumption of infinite capacity. CPS consists of three major modules: WIP-pulling module, workload allocation and accumulation module, and wafer release module. To meet the master production schedule (MPS), the WIP-pulling module pulls WIP from the end of the process routine. The workload allocation and accumulation module then calculates the expected equipment loading in different time periods. If WIP cannot satisfy the MPS requirement, the wafer release module is used to determine the planned wafer start time and the start production fab. On the basis of experimental design, simulation results show that CPS can smooth equipment loading in different time periods and balance the workload between fabs.

Wafer fabrication

10.1109/issm.1999.808799

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Citations (5)