检索结果-内蒙古大学图书馆

Solution of suspension cylinder subject to linear distribution pressure and different bending moment and shearing force on both ends

引用

ICIC Express Letters, Part B: Applications 2015年第6期6卷 1639-1644页

作者： Zhang, Chunhui Zhao, Jingyi Liu, Wen Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University No. 438 Hebei Ave Qinhuangdao China Key Laboratory of Advanced Forging and Stamping Technology and Science Yanshan University No. 438 Hebei Ave Qinhuangdao China Colloge of Science Yanshan University No. 438 Hebei Ave Qinhuangdao China

The suspension cylinder of a mining dump truck is usually stressed to deform and crack. In order to solve this problem so as to improve the service life and safety, the analytic solution meeting boundary conditions for internal surface of suspension cylinder subjected to linear distribution pressure and different bending moment and shearing force on both ends is deduced on the basis of structure of the cylinder and displacement functions. When strain values of cylinder are recorded by static strain tester on suspension cylinder, the experimental results are in accordance with the theoretic calculation. The study laid a foundation for the design and application of suspension cylinder. © 2015 ISSN.

关键词： Cylinders (shapes)

来源：评论

学校读者我要写书评

暂无评论

Numerical simulation analysis and experimental research on multistage throttle orifice

引用

ICIC Express Letters, Part B: Applications 2016年第11期7卷 2497-2504页

作者： Gao, Dianrong Yu, Meiqi Luo, Hongliang Key Laboratory of Advanced Forging & Stamping Technology and Science Yanshan University Ministry of Education of China No. 438 Heibei Ave. Qinhuangdao066004 China Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University No. 438 Heibei Ave. Qinhuangdao066004 China

Multistage orifice is widely used in large pipe transmission systems. In order to find the key factors which affect the energy dissipation, the orifice characteristics with different geometrical parameters were analyzed by numerical simulation and experiment. At first, numerical model of orifice was built. Then simulation results were got with different orifice thickness, distribution diameter and chamfering of orifice hole by Fluent. Finally, experiment was performed to verify the simulation which proved that the simulation results were correct and practical. © 2016 ICIC International.

关键词： Energy dissipation

来源：评论

学校读者我要写书评

暂无评论

Molecular Dynamics Simulation Analysis of the Indentation Hardness of Nano-Twinned Ni

SSRN

引用

SSRN 2022年

作者： Zhang, Qin Zhou, Bingrao Wang, Wei Li, Rongbin Lv, Zhiqing Key Laboratory of Advanced Forging & Stamping Technology and Science Yanshan University Ministry of Education of China Qinhuangdao066004 China State Key Laboratory of Metastable Material Science and Technology Yanshan University Qinhuangdao066004 China Shanghai Engineering Research Center of Hot Manufacturing Shanghai Dianji University Shanghai200245 China

Molecular dynamics simulations were employed to perform the nanoindentation analysis of nanocrystalline nickel with different crystal structures (single-crystal, polycrystalline, and nano-twinned) and twin layer thicknesses under a spherical indenter. To understand the effects of crystal structure and twin spacing on nanoindentation responses, the crystal structure, dislocation, strain, indentation force, temperature, hardness, Young's modulus, and elastic recovery rate of the indentation region were analyzed. It was noticed that crystal structure and twin spacing had great influences on the mechanical properties and elastic recovery rate of the three types of nanocrystalline nickel. In the single-crystal structure, plastic deformation occurred mainly due to dislocations and slips. In the polycrystalline structure, plastic deformation occurred due to dislocation–grain boundary interactions, whereas in the nano-twinned structure, dislocation–grain boundary and dislocation–twin boundary interactions were the main reasons for plastic deformation. In the single-crystal structure, the hydrostatic pressure was distributed in a "V"-shape below the indenter. In the polycrystalline structure, atoms under the compressive stress were distributed below the indenter and at crystal boundaries. In the nano-twinned structure, atoms under the compressive stress were mainly distributed below the indenter. © 2022, The Authors. All rights reserved.

关键词： Nanoindentation

来源：评论

学校读者我要写书评

暂无评论

Active Disturbance Rejection Trajectory Tracking Control for Pneumatic Servo System Based on Backstepping Approach

Active Disturbance Rejection Trajectory Tracking Control for...

引用

第三十四届中国控制会议

作者： Yafei Yang Ling Zhao Xiaozhao Fan Zhixin Liu School of Electrical Engineering Yanshan University Hebei Province Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Key Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University) Ministry of Education of China College of Mechanical Engineering Yanshan University

ISBN: (纸本)9781467374439

This paper presents an improved active disturbance rejection controller to study the trajectory tracking problem of a pneumatic servo system. It is a challenging job to track a given trajectory for pneumatic system with strong nonlinearity. The designed active disturbance rejection controller consists of tracking differentiator, extended state observer and nonlinear *** differentiator is designed to arrange a transition process for the given signal and get its corresponding differential *** state observer has advantages in observing states and estimating the nonlinear part of system. Moreover, a nonlinear controller is derived on the basis of backstepping approach. Finally, simulation results indicate the capabilities of the proposed method.

关键词： Active disturbance rejection control,Backstepping approach,Rodless pneumatic cylinder,Trajectory tracking

来源：评论

学校读者我要写书评

暂无评论

Study and Implementation of Non-Smooth Weld Identification Based on LabVIEW

Study and Implementation of Non-Smooth Weld Identification B...

引用

第六届工程机械与车辆工程新进展国际学术会议

作者： Liu Tao Zhang lian-meng Zhang Dan Li wei-jian Zhang xin-yu Hebei Province Laboratory of Heavy Machinery Fluid Power Transmission and Control Key Laboratory of Ministry of Education for Advanced Forging Press Forming Technology and Science

Machine vision is widely used in welding intelligent technology,weld identification is an important prerequisite and *** paper expounds the identification method of non-smooth welds and use

关键词：

来源：评论

学校读者我要写书评

暂无评论

Study on Double Differential Pressure Dynamic Flowmeter

Study on Double Differential Pressure Dynamic Flowmeter

引用

第六届工程机械与车辆工程新进展国际学术会议

作者： Liu Tao Yin zhi-gang Zhang lian-meng Zuo zhi-bing Hebei Province Laboratory of Heavy Machinery Fluid Power Transmission and Control Key Laboratory of Ministry of Education for Advanced Forging Press Forming Technology and Science

In the test of electro-hydraulic proportional valve,it is necessary to test the high frequency dynamic flow with *** of the limitation of piston stroke,no load hydraulic cylinder is only suit

关键词：

来源：评论

学校读者我要写书评

暂无评论

Research on algorithm of braking pressure estimating for anti-lock braking system of motorcycle

Research on algorithm of braking pressure estimating for ant...

引用

IEEE International Conference on Aircraft Utility Systems (AUS)

作者： Jing Yao Yang Zhang Juan Wang Ministry of Education of China Key Laboratory of Advanced Forging & Stamping Technology and Science Qinhuangdao Hebei Province Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Qinhuangdao CO China School of Mechanical Engineering Yanshan University Qinhuangdao CO China

ISBN: (纸本)9781509010882

An effective pressure estimation algorithm of ABS for motorcycles was proposed in this paper to get the relatively accurate wheel cylinder pressure. Firstly, the performance characteristics of hydraulic control unit was studied and the vehicle model was established by using BikeSim. Next, the pressure estimation algorithms of master cylinder and wheel cylinder were studied. The estimated pressure is modified according to different vehicle braking stages. Finally, based on an actual motorcycle the wheel cylinder pressure was obtained under different pavements and braking initial speeds by ABS experimental platform to validate the effectiveness of wheel cylinder pressure estimation algorithm. The results show that the actual wheel cylinder pressure can be well tracked by the estimated wheel cylinder pressure with an allowable pressure error.

关键词： Wheels Motorcycles Force Estimation Mathematical model Valves Pistons

来源：评论

学校读者我要写书评

暂无评论

Sliding mode control for network control systems with packets dropout

Sliding mode control for network control systems with packet...

引用

第三十四届中国控制会议

作者： Luyang Zhang Ling Zhao Li Li Institute of Electrical Engineering Yanshan University Hebei Province Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Key Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University) Ministry of Education of China College of Mechanical Engineering Yanshan University

ISBN: (纸本)9781467374439

In this paper, we investigate the problems of stabilization of networked control systems with packets dropout via delta operator approach. A sliding mode controller is constructed to analyze the stochastic stability of the closed-loop networked control systems. The process of packets dropout is modeled as a Bernoulli process. Sufficient LMI conditions are developed to guarantee the existence of the discrete linear sliding surfaces. By solving the conditions, a linear sliding surface is characterized and a sliding mode controller is designed. Simulation results are given to demonstrate the effectiveness of the proposed approach.

关键词： Sliding mode control,network control systems(NCSs),delta operator system,packets dropout

来源：评论

学校读者我要写书评

暂无评论

Structural Design and Simulation Optimization of New Type Telescoping Heavy Hydraulic Trailer Steering System

Structural Design and Simulation Optimization of New Type Te...

引用

The 16th International Conference on Fluid Dynamic and Mechanical & Electrical Control Engineering(FDMECE2012)

作者： Rui Guo Jingyi Zhao Yongchang Wang Decai Han Hebei Province key laboratory of heavy machinery fluid power transmission and control Ministry of education key laboratory of Advanced forging technology and science Environmental Management College of China

ISBN: (纸本)9783037855164

The length variability of telescoping heavy hydraulic trailer wills casue friction and sliding,increasing drag torque and power consumption of steering,moreover,and reducing the security and reliability of steering,so the new type follow-up steering system is designed and studied. In order to reduce the turning radius and tire wear,the adjustable steering wheel structure and double front axle mechanism are *** this basis,the theoretical analysis of the steering system is carried out,and the mathematical model is *** minimum error of actual and ideal angle is regarded as the optimization goal of pure rolling condition,and the simulation optimization and experimental research is *** results show that:the steering structural optimization is feasible, the performance is optimal on the condition that the actual and ideal angle valves of inside and outside wheels of each axis are approximately equal in turning process,and can reflect the advantage of new follow-up steering system in lowering power consumption,improving product life cycle and other areas.

关键词： telescoping heavy hydraulic trailer follow-up steering system steering error simulation optimization

来源：评论

学校读者我要写书评

暂无评论

Study on the safety design of main arm mechanism in slag pot carrier

Study on the safety design of main arm mechanism in slag pot...

引用

The 16th International Conference on Fluid Dynamic and Mechanical & Electrical Control Engineering(FDMECE2012)

作者： Rui Guo Jingyi Zhao Decai Han Yongchang Wang Hebei Province key laboratory of heavy machinery fluid power transmission and control Ministry of education key laboratory of Advanced forging technology and science Environmental Management College of China

ISBN: (纸本)9783037855164

According to the new kind of the upper arm mechanism of the slag pot carrier,optimization design,simulation and experimental research are carried out,in which the combination of conventional design,three dimensional virtual design and experimental study are *** motion law of multi-segment arc slide way of main arm is given by means of researching the motion process of slag ladle in the main arm slide *** functional relationship among the internal parameters of the arm mechanism,and between load force and arm movement is revealed by studying kinematics of mechanism and dynamics law of the upper arm *** finite element analysis of the upper arm mechanism is carried out to get the weak links of structure strength,and then the improvement solution is *** experiments,the method correctness of optimization and design of upper arm mechanism is testified by the coincidence of the trial results and experimentation results.

关键词： slag pot carrier mechanism design Virtual technology Simulation and Optimization Experimental study

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：