The Experts below are selected from a list of 7467 Experts worldwide ranked by ideXlab platform
Seungbok Choi - One of the best experts on this subject based on the ideXlab platform.
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effects of magnetic core parameters on landing stability and efficiency of magnetorheological damper based landing Gear System
Journal of Intelligent Material Systems and Structures, 2020Co-Authors: Chulhee Han, Bogyu Kim, Byunghyuk Kang, Seungbok ChoiAbstract:In this research, a new type of magnetorheological damper for a small-sized aircraft landing Gear System is proposed and its performance is evaluated with respect to design parameters of the magnet...
Yue Zong Xiang - One of the best experts on this subject based on the ideXlab platform.
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Research on Dynamic Load-Sharing Characteristics of Two-Stage Asymmetric Star Gear System
IEEE Access, 2019Co-Authors: Mo Shuai, Ma Shuai, Jin Guo Guang, Yue Zong XiangAbstract:It is well known that the asymmetric Gears of the transmission System enhances the load carrying capacity of System, but there is no relevant conclusion about the dynamic load-sharing characteristics of the asymmetric Gear transmission System. In order to analyze the dynamic performance of an asymmetric Gear System, taking two-stage asymmetric helical Gear star drive System as the research object, the load-sharing model of the two-stage asymmetrical helical star Gear System is established by the centralized mass method and Newton's second law. The load sharing characteristic of the star Gear is studied about the floating member and the tooth profile pressure angle. The influence of eccentricity error, load and input speed on the load sharing performance of the System is analyzed. Based on ADAMS virtual prototype model, through the simulation analysis of the dynamic meshing force of Gears, the load sharing coefficient of each star Gear is calculated, compare the results with the MATLAB solution to verify the correctness of the theory.
Régine Laleau - One of the best experts on this subject based on the ideXlab platform.
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Modeling a landing Gear System in Event-B
International Journal on Software Tools for Technology Transfer, 2017Co-Authors: Amel Mammar, Régine LaleauAbstract:This article describes the Event-B modeling of a landing Gear System of an aircraft whose complete description can be found in Boniol and Wiels (The Landing Gear System Case Study, ABZ Case Study, Communications in Computer Information Science, vol 433, Springer, Berlin, 2014). This real-life case study has been proposed by the ABZ'2014 track that took place in Toulouse, the European capital of the aeronautic industry. Our modeling is based on the Parnas and Madey's 4-Variable Model that permits to consider the different parts of a System. These parts are incrementally introduced using the Event-B refinement technique. The entire development has been carried out with the Rodin toolset. To ensure the correctness of the different components, we use several verification techniques (animation, model checking and proof) depending on the complexity and the kind of the properties to verify. Basically, prior to the proof phase that can be tedious and complex, we use the animator AnimB and the model checker ProB that permit to discover some trivial inconsistencies. Once no error is reported, we start the proof phase by using the Atelier B and SMT provers which we installed on Rodin. We conclude the article by drawing up some key findings of and lessons learned from this experience.
Chulhee Han - One of the best experts on this subject based on the ideXlab platform.
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effects of magnetic core parameters on landing stability and efficiency of magnetorheological damper based landing Gear System
Journal of Intelligent Material Systems and Structures, 2020Co-Authors: Chulhee Han, Bogyu Kim, Byunghyuk Kang, Seungbok ChoiAbstract:In this research, a new type of magnetorheological damper for a small-sized aircraft landing Gear System is proposed and its performance is evaluated with respect to design parameters of the magnet...
Norman M. Wereley - One of the best experts on this subject based on the ideXlab platform.
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vibration control of a landing Gear System featuring electrorheological magnetorheological fluids
Journal of Aircraft, 2003Co-Authors: Young-tai Choi, Norman M. WereleyAbstract:The feasibility and effectiveness of electrorheological (ER) and magnetorheological (MR) fluid-based landing Gear Systems on attenuating dynamic load and vibration due to the landing impact are demonstrated. First, the theoretical model for ER/MR shock struts, which are the main components of the landing Gear System,is developed based on experimental data. The analysis of a telescopic-type landing Gear System using the ER/MR shock struts is theoretically constructed, and its governing equation is derived. A sliding mode controller, designed to be robust against parameter variations and external disturbances, is formulated, and controlled performance of the simulated ER/MR landing Gear System is theoretically evaluated during touchdown of the aircraft.
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Vibration Control of a Landing Gear System Featuring Electrorheological/Magnetorheological Fluids
Journal of Aircraft, 2003Co-Authors: Young-tai Choi, Norman M. WereleyAbstract:The feasibility and effectiveness of electrorheological (ER) and magnetorheological (MR) fluid-based landing Gear Systems on attenuating dynamic load and vibration due to the landing impact are demonstrated. First, the theoretical model for ER/MR shock struts, which are the main components of the landing Gear System,is developed based on experimental data. The analysis of a telescopic-type landing Gear System using the ER/MR shock struts is theoretically constructed, and its governing equation is derived. A sliding mode controller, designed to be robust against parameter variations and external disturbances, is formulated, and controlled performance of the simulated ER/MR landing Gear System is theoretically evaluated during touchdown of the aircraft.
