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Research on adaptive anti-rollover control of kiloton bridge transporting and laying vehicles

High technology Letters 2017年第2期23卷 203-211页

作者：郭锐 Shi Yu Wang Chao Tian Yaya Zhao Jingyi Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Key Laboratory of Advanced Forging & Stamping Technology and Science ( Yanshan University) College of Mechanical Engineering Yanshan University Qinhuangdao 066004 P. R. China Lianyungang Tianming Equipment Co. Ltd Lianyungang 222000 P. R. China

The SPMT construction method is a new rapid construction technology of large urban overpass with unblocked traffic,and unstability of SPMT construction method equipment cannot be accurately described due to the concrete beam size,irregular shape and complex transport conditions,which is called kiloton bridge transporting and laying *** anti-rollover performance of SPMT suspension system is studied,and vehicle side slip angle and load transfer rate(LTR) are regarded as the evaluation *** active suspension adaptive anti-rollover control model of SPMT,in which roll stability affected by the structural parameters and control parameters,is built based on fuzzy PID,and the effectiveness of the control method is verified through real vehicle test.

关键词： kiloton bridge transporting and laying vehicle SPMT construction method active suspension adaptive anti-rollover control

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Numerical Simulation and Analysis to the behavior of Inner Hole Defect of Integral Top Cover for Pressure Vessel

Numerical Simulation and Analysis to the behavior of Inner H...

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2013 2nd International Conference on Manufacture Engineering,Quality and Production System(ICMEQP 2013)

作者： Zhaoqing Yu Shaomin Nie Shaoyin Qi Rongsheng Qi Xingang Liu Miao Jin Key Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University) Ministry of Education of China

The integral top cover for nuclear reactor pressure vessel is an important force component in the pressure vessel. It works under the HPHT and radiation long time, which increases forging difficultly and needs extremely high quality. Due to the effect of bi-directional tensile stress in spherical part during the shape forming stage of the integral top cover, it is easy to make holes and other defects of the blank extend. Then, it is necessary to study the behavior of the inner hole defect of integral top cover. This paper, by numerical simulation technology, concrete analyses the volume of the hole defect, the size of the hole defect and variation of the hole edges in the stress-strain fields during the shape forming stage of the integral top cover. It researches the control scope of the original size of blank holes when the integral top cover forging meet the requirements of the flaw detection. Research results show that, according to the requirements of volume and maximum size permissible value, the diameter of holes in the integral top cover blank should be respectively less than 1.8 mm, 1.5 mm.

关键词： Integral top cover Hole defect Numerical simulation analysis Permissible value

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Simulation on the Transient Thermal Stress Field of the Wall-Shaped Part Deposited by Laser Direct Metal Powder Deposition

Simulation on the Transient Thermal Stress Field of the Wall...

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2012 International Conference on Biomaterial and Bioengineering(ICBB 2012)

作者： Mingzhe Xi Key Laboratory of Advanced Forging & Stamping Technology and Science(Yanshan University) Ministry of Education of China

A thermo-kinetic model for the transient thermal stress field of the wall-shaped part produced using laser direct powder deposition process is developed. In case of numerical modeling, the capabilities of ANSYS parametric design language and the the ‘birth and death' element technique were employed. The distribution of the thermal stress of the wall-shaped part at different time was calculated by the model. Results show that during process, the X-direction thermal stress within top layer of the wall-shape part and that within the interior deposited layers of the wall-shape part was tensile stress and compressive stress, respectively. The deformation of the wall-shaped part and base plate was also calculated.

关键词： Finite element analysis Transient thermal stress field Laser direct powder deposition 316L stainless steel powder

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Life prediction and test period optimization research based on small sample reliability test of hydraulic pumps

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High technology Letters 2017年第1期23卷 63-70页

作者：郭锐 Ning Chao Zhao Jingyi Wang Ping Shi Yu Zhou Jinsheng Luo Jing Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan UniversityKey Laboratory of Advanced Forging&Stamping Technology and Science(Yanshan University)Qinhuangdao 066004P.R.China Huachuang Tianyuan Industrial Developing Co. LtdLangfang 065000P.R.China College of Art and Design Yanshan UniversityQinhuangdao 066004P.R.China Beijing Research Institute of Automation for Machinery Industry Beijing 100120P.R.China

Hydraulic pumps belong to reliable long-life hydraulic components. The reliability evaluation includes characters such as long test period,high cost,and high power loss and so on. Based on the principle of energy-saving and power recovery,a small sample hydraulic pump reliability test rig is built,and the service life of hydraulic pump is predicted,and then the sampling period of reliability test is optimized. On the basis of considering the performance degradation mechanism of hydraulic pump,the feature information of degradation distribution of hydraulic pump volumetric efficiency during the test is collected,so an optimal degradation path model of feature information is selected from the aspect of fitting accuracy,and pseudo life data are obtained. Then a small sample reliability test of period constrained optimization search strategy for hydraulic pump is constructed to solve the optimization problem of the test sampling period and tightening end threshold,and it is verified that the accuracy of the minimum sampling period by the non-parametric hypothes is tested. Simulation result shows it could possess instructional significance and referenced value for hydraulic pump reliability life evaluation and the test's research and design.

关键词： hydraulic pump small sample test volumetric efficiency degradation path model life span period optimal

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The deformation characteristics of hydro-forming of differential gear box for automobile

The deformation characteristics of hydro-forming of differen...

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作者： Huang, Wen Yu, Hai Bo Lu, Hong Qin, Si Ji National Engieering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan University Qinhuangdao Hebei 066004 China Key Laboratory of Advanced Forging and Stamping Technology and Science Yanshan University Ministry of Education of China Qinhuangdao Hebei 066004 China

ISBN: (纸本)9783038351221

The hydroforming process of differential gear box for automobile under axial compressive load and internal bulging pressure was simulated and the load paths were optimized. The hydroforming process is divided into two steps. The deformation under different load paths was investigated using dynamic explicit finite element method. The distribution of equivalent strain and thickness was investigated as well. The simulation results show that the forming path for the first step is optimal when internal pressure changes linearly from 37MPa to 65MPa with the axial displacement. © (2014) Trans Tech Publications, Switzerland.

关键词： Finite element method

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Analysis on performance and test of a new type of ultra-high pressure pipe joint

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High technology Letters 2018年第2期24卷 203-207页

作者： Zhai Fugang Kong Xiangdong Sun Yugang Wang Zhong Hao Xiaobei College of Mechanical Engineering Yanshan University Qinhuangdao 066004 P. R. Chin Key Laboratory of Advanced Forging ＆ Stamping Technology and Science （Yanshan University） Ministry of Education of China Qinhuangdao 066004 P. R. Chin Huaye Power Technology Co. Foshan 528300 P. R. China

Analysis as well as application of ultra-high pressure hydraulic system and elements has become a trend. The structure and operation principle of a new type of ultra-high pressure pipe joint is introduced. The structure of the new type of ultra-high pressure pipe joint is simple and is easy to be produced. The finite element model on two working conditions( preload condition with 30 N·m torque and static-loading condition with 70 MPa pressure) is built and computed. The width of contact area,the equivalent stress status,as well as the contact pressure status are plotted and analyzed. According to the national standard,test on air-tightness,blasting,and cyclic endurance is conducted and the results show that the new type of ultra-high pressure pipe joint has the sealability for ultra-high pressure up to 70 MPa,and the DN6 ultra-high pressure pipe joint can provide effective seal under70 MPa fluid pressure. The research can provide a thinking and method on designing ultra-high pressure pipe joint and push forward the development of ultra-high pressure hydraulic system.

关键词： pipe joint ultra-high pressure sealing performance hydraulic system

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Analysis of a Five-Degree-of-Freedom Hybrid Robot RPR/RP + RR + P 23rd

Analysis of a Five-Degree-of-Freedom Hybrid Robot RPR/RP + R...

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23rd IFToMM China International Conference on Mechanism and Machine science and Engineering, IFToMM CCMMS 2022

作者： Ma, Xuejian Xu, Yundou Wang, Yu Yang, Fan Zhao, Yongsheng Yao, Jiantao Zhou, Yulin Laboratory of Parallel Robot and Mechatronic System of Hebei Province Yanshan University Qinhuangdao066004 China Key Laboratory of Advanced Forging and Stamping Technology and Science Yanshan University Qinhuangdao066004 China School of Mechanical Engineering Yanshan University Qinhuangdao066004 China

ISBN: (纸本)9789811993978

This work proposes a hybrid machining robot RPR/RP + RR + P based on a planar parallel mechanism. Based on the screw theory, the characteristics of the degree of freedom of the hybrid robot are analyzed, and then the inverse and forward kinematics are solved by geometric methods. And size optimization is carried out by taking the workspace and driving forces as the objects. Then the working space of the hybrid robot is calculated by the Monte Carlo method. Finally, the three-dimensional model of the mechanism is established, and through ADAMS simulation, the accuracy of the inverse kinematics solution was verified. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Inverse kinematics

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Simulation and experimental research of digital valve control servo system based on CMAC-PID control method

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High technology Letters 2017年第3期23卷 306-314页

作者：赵劲松 Zhao Zining Wang Zhipeng Zhang Chuanbi Yao Jing Hebei Province Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Qinhuangdao 066004 P. R. China Key Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University) Ministry of Education of China Qinhuangdao 066004 P. R. China School of Mechanical Engineering Yanshan University Qinhuangdao 066004 P. R. China

Digital valve control servo system is studied in this paper. In order to solve the system problems of poor control precision and slow response time,a CMAC-PID( cerebellar model articulation controller-PID) compound control method is proposed. This compound controller consists of two components: one is a traditional PID for the feedback control to guarantee stability of the system; the other is the CMAC control algorithm to form a feed-forward control for achieving high control precision and short response time of the controlled plant. Then the CMAC-PID compound control method is used in the digital valve control servo system to improve its control performance. Through simulation and experiment,the proposed CMAC-PID compound control method is superior to the traditional PID control for enhancing stability and robustness,and thus this compound control can be used as a new control strategy for the digital valve control servo system.

关键词： electro-servo system digital hydraulic digital valve CMAC-PID compound control rapid control prototyping technology

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Research on active online diagnosis technology of hydraulic system

Research on active online diagnosis technology of hydraulic ...

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4th International Conference on Frontiers of Manufacturing science and Measuring technology, ICFMM 2014

作者： Yang, Cheng Gang Zhang, Chun Hui Zhao, Jing Yi Zhao, Shi Ming Tangshan Industrial Vocational and Technical College Tangshan 063000 China Hebei Province Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Qinhuangdao 066004 China Key Laboratory of Advanced Forging and Stamping Technology and Science Yanshan University Qinhuangdao 066004 China

ISBN: (纸本)9783038351924

Based on the introduction of the hydraulic diagnostic techniques which are commonly used and existed defects in these methods, the active hydraulic diagnosis technology is put forward. Besides, theory analysis of active online test is elaborated. The theory of active diagnose is used in the hydraulic system of heavy transporter to describe online diagnosis method. The results show that the active hydraulic diagnosis is appropriate for all kinds of hydraulic system which is a general diagnosis method. © (2014) Trans Tech Publications, Switzerland.

关键词： Hydraulic equipment

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Effects of structural parameters on hydraulic performance of flow regulator

Effects of structural parameters on hydraulic performance of...

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CSAA/IET International Conference on Aircraft Utility Systems, AUS 2018

作者： Li, Yong Zong, Xuemei Yuan, Xiaoming Zhao, Shiyi State Key Laboratory of Intelligent Manufacturing of Advanced Construction Machinery Jiangsu Xuzhou Construction Machinery Research Institute Xuzhou Construction Machinery Group Co. Ltd. Xuzhou China Hebei Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Key Laboratory of Advanced Forging and Stamping Technology and Science Yanshan University Qinhuangdao Hebei China

ISBN: (纸本)9781785617911

In order to evaluate the hydraulic performance of a regulator, the pressure loss and the stabilization performance of the regulator installed in the fire water monitor were introduced. The effects of structures on a regulator were investigated by the structural model made in UG and the flow simulation conducted in ANSYS. The hydraulic performance of a star-shaped regulator was analyzed with different structure parameters, such as the blade number, axial length and rounded-corner. The effects of structure parameters on the regulator were revealed, based on which the hydraulic performance of the improved regulator with different blade numbers was analyzed. The results show that the improved regulator with two cross-sections in dislocation and six even-distributed blades has the better hydraulic performance. The preliminary experimental results show that the improved regulator can improve the jet range of a fire water monitor. © 2018 IET Conference Publications. All rights reserved.

关键词： Flow simulation

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