Beihang University 7 articles published in JoVE Engineering Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator Yongling Fu1,2, Yuxuan Ma1,2, Zhenyu Gou3, Tuanhui Guo1,2, Junhao Liu1,2, Jiangao Zhao2,4 1School of Mechanical Engineering and Automation, Beihang University, 2Laboratory of Aerospace Servo Actuation and Transmission, Beihang University, 3AVIC Chengdu Aircraft Design & Research Institute, 4Research Institute for Frontier Science, Beihang University In this paper, an adaptive filter based on a normalized least mean square (NLMS) algorithm and a rotational speed estimation method are introduced to detect the electrical and hydraulic faults of the electro-hydrostatic actuator (EHA). The efficacy and feasibility of the aforementioned methods are verified through simulations and experiments. Engineering Modeling and Experimental Analysis of the Single-Shaft Coaxial Motor-Pump Assembly in Electrohydrostatic Actuators Jiangao Zhao1,2, Deming Zhu2,3, Yuxuan Ma2,3, Yongling Fu2,3, Jian Fu2,3 1Research Institute for Frontier Science, Beihang University, 2School of Mechanical Engineering and Automation, Beihang University, 3Laboratory of Aerospace Servo Actuation and Transmission, Beihang University We built a simulation model to evaluate pump flow characteristics and performance of the single-shaft coaxial motor-pump assembly in electrohydrostatic actuators and investigate the overall efficiency in a wide set of working conditions of the motor-pump assembly experimentally. Engineering A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump Xu Han1, Peng Zhang2, Tatiana Minav3, Yongling Fu1, Jian Fu1 1School of Mechanical Engineering and Automation, Beihang University, 2Beijing Institute of Precision Mechatronics and Controls, 3Innovative Hydraulics and Automation, Tampere University A simulation model specifically supporting the preliminary design of an electro-variable displacement pump (EVDP) is developed and partially verified by experiments. The control performance, life, reliability, etc., can all be evaluated using the proposed model, which covers the main performance requirements under the EVDP preliminary design task. Medicine Augmented Reality Navigation-Guided Core Decompression for Osteonecrosis of Femoral Head Qi Wang*1,3, Qiuyuan Wang*2,3, Ran Ding3, Youjie Yao4, Junjun Pan5, Weiguo Wang3 1China-Japan Friendship School of Clinical Medicine, Peking University, 2Graduate School of Beijing University of Chinese Medicine, 3Department of Orthopedic Surgery, Beijing Key Lab of Immunes-Mediated Inflammatory Disease, China-Japan Friendship Hospital, 4Beijing Normal University, 5State Key Laboratory of Virtual Reality Technology and Systems, Beihang University Augmented reality technology was applied to core decompression for osteonecrosis of the femoral head to realize real-time visualization of this surgical procedure. This method can effectively improve the safety and precision of core decompression. Bioengineering Microfluidic Model to Mimic Initial Event of Neovascularization Ping Zhao1, Xing Zhang1, Xiao Liu1, Li Wang4, Haoran Su1, Liyi Wang1, Dongrui Zhang1, Xiaoyan Deng3, Yubo Fan1,2 1Beijing Advanced Innovation Centre for Biomedical Engineering, Key Laboratory for Biomechanics and Mechanobiology of Chinese Education Ministry, School of Biological Science and Medical Engineering, Beihang University, 2School of Engineering Medicine, Beihang University, 3Artificial Intelligence Key Laboratory of Sichuan Province, School of Automation and Information Engineering, Sichuan University of Science and Engineering, 4Beijing Research Center of Urban System Engineering Here, we provide a microfluidic chip and an automatically controlled, highly efficient circulation microfluidic system that recapitulates the initial microenvironment of neovascularization, allowing endothelial cells (ECs) to be stimulated by high luminal shear stress, physiological level of transendothelial flow, and various vascular endothelial growth factor (VEGF) distribution simultaneously. Engineering A 100 KW Class Applied-field Magnetoplasmadynamic Thruster Baojun Wang1, Haibin Tang2, Yibai Wang1, Chao Lu1, Cheng Zhou3, Yangyang Dong1, Ge Wang3, Yuntian Cong3, Daniel Luu4, Jinbin Cao2 1Key Laboratory of Spacecraft Design Optimization & Dynamic Simulation Technologies of Ministry of Education, School of Astronautics, Beihang University, 2Key Laboratory of Spacecraft Design Optimization & Dynamic Simulation Technologies of Ministry of Education, School of Space and Environment, Beihang University, 3Beijng Institute of Control Engineering, 4School of Aerospace Engineering and Geodesy, University of Stuttgart The goal of this protocol is to introduce the design of a 100 kW class applied-field magnetoplasmadynamic thruster and relevant experimental methods. Engineering Preparation and High-temperature Anti-adhesion Behavior of a Slippery Surface on Stainless Steel Pengfei Zhang1, Chen Huawei1, Guang Liu1, Liwen Zhang1, Deyuan Zhang1 1School of Mechanical Engineering and Automation, Beihang University Slippery surfaces provide a new way to solve the adhesion problem. This protocol describes how to fabricate slippery surfaces at high temperatures. The results demonstrate that the slippery surfaces showed anti-wetting for liquids and a remarkable anti-adhesion effect on soft tissues at high temperatures.
