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基于体积成形的虚拟试验体系

系统仿真学报 2005年第1期17卷 114-116,128页

作者：应富强潘孝勇浙江工业大学机电工程学院

重点提出了基于金属体积成形的虚拟试验体系的功能特点、集成模型以及各项计算机辅助技术在塑性产品开发中的作用,及基于网络实现集成与数据交换、协同工作的理论与方法。针对现状,提出金属体积成形的虚拟试验体系模型,重点阐述各个部... 详细信息

重点提出了基于金属体积成形的虚拟试验体系的功能特点、集成模型以及各项计算机辅助技术在塑性产品开发中的作用,及基于网络实现集成与数据交换、协同工作的理论与方法。针对现状,提出金属体积成形的虚拟试验体系模型,重点阐述各个部分的实现方法;对其中涉及到的关键技术进行讨论,并通过比较前人的实现方法,进行一定的改进;最后,通过简单的楔横轧虚拟试验进行初步验证其可行性。

关键词：体积成形虚拟试验 CAX技术协同

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高职院校学生综合素质的模糊综合系统分析

系统科学学报 2011年第3期19卷 82-86,96页

作者：黄会明陈宁浙江机电职业技术学院电气电子工程学院浙江杭州310053 浙江理工大学机械与自动控制学院浙江杭州310018

本文应用模糊数学理论建立了二级模糊综合评判模型,并应用于学生综合素质评价。首先,根据高职院校的教育特点,建立了一套反映高职学生综合素质的二级指标体系,采用改进的层次分析法来确定指标权重,通过引入隶属函数将定量指标模糊化,并... 详细信息

本文应用模糊数学理论建立了二级模糊综合评判模型,并应用于学生综合素质评价。首先,根据高职院校的教育特点,建立了一套反映高职学生综合素质的二级指标体系,采用改进的层次分析法来确定指标权重,通过引入隶属函数将定量指标模糊化,并建立了单因素评价矩阵;然后结合实例,阐述了模糊综合评判模型的具体步骤,实现了学生综合素质的定性分析与量化评价。结果表明,该模型合理、可靠,为综合素质的客观评价提供了科学依据。

关键词：综合素质指标体系隶属函数层次分析法模糊综合系统分析

RECURSIVE FORMULATIONS FOR DYNAMIC ANALYSIS OF A SMART CRACKED BEAM BASED ON THE METHOD OF REVERBERATION-RAY MATRIX

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RECURSIVE FORMULATIONS FOR DYNAMIC ANALYSIS OF A SMART CRACK...

2010全国压电和声波理论及器件技术研讨会

作者： Wei YAN~1,Jin-biao CAI~2,Wei-qiu CHEN~3,Ji WANG~4 1 faculty of Architectural,Civil engineering and Environment,Ningbo university, Ningbo 315211,china 2 Department of Civil engineering,zhejiang university,Zijingang Campus, hangzhou 310058,china 3 Department of engineering Mechanics,zhejiang university,Yuquan Campus, hangzhou 310027,china 4 faculty of mechanical engineering and Mechanics,Ningbo university,Ningbo 315211,china

An accurate electro-mechanical impedance(EMI) model for analytical crack detection of a Timoshenko beam is established based on the improved reverberation-ray matrix method via the recursive formulations. The crack is treated as a massless rotational spring.A pair of PZT patches with free ends symmetrically bonded onto the beam is assumed in a state of pure one-dimensional axial motion under an out-of-phase harmonic electric force and hence a pure bending excitation of the beam is created.A Kelvin-type viscoelastic law is introduced into the EMI model to account for the bonding effect in order to improve the signature sensitivity to *** order to develop the recursive formulations to reduce the size of the final equations in the method of reverberation-ray matrix(MRRM),new scattering relations are established by a matrix reduction ***,an analytical expression of impedance containing crack parameters as well as other physical parameters is derived for crack detection of beams.

关键词： EMI damage detection method of reverberation-ray matrix recursive formulations

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齿轮点蚀的多通道数据融合识别方法

振动．测试与诊断 2014年第1期34卷 63-68,190页

作者：熊炘杨世锡甘春标叶红仙浙江大学液压传动及控制国家重点实验室杭州310027 上海大学机电工程与自动化学院上海200072 杭州电子科技大学机械工程学院杭州310018

针对齿轮箱振动信号中混杂其他零部件振动频率的问题,提出一种基于小波包分解独立分量分析(wavelet package independent component analysis,简称WPICA)和多维经验模式分解(multivariate empirical mode decomposition,简称MEMD)的齿轮箱齿面点蚀故障信号的多通道数据融合识别方法。首先,利用一种窄带独立分量分析(sub-band decomposition independent component analysis,简称SDICA)方法—WPICA,从水泵机组多通道信号中提取齿轮箱振源,确定齿轮箱振动包含的特征频率成分;其次,借助MEMD分解多通道机组振动信号,将所获得的多维固有模式函数(intrinsic mode function,简称IMF)进行矩阵互信息运算,完成多通道数据的融合;最后,通过定义IMF故障敏感因子,确定故障敏感IMF的阶数并获得了齿轮点蚀故障的特征频率。数据分析结果证明了本研究方法的有效性。

关键词：齿轮箱齿轮点蚀小波包分解独立分量分析多维经验模式分解

DELAMINATION DETECTION IN LAMINATED COMPOSITE BEAMS USING ELECTRO-mechanical IMPEDANCE SIGNATURES

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DELAMINATION DETECTION IN LAMINATED COMPOSITE BEAMS USING EL...

第三届全国压电和声波理论及器件技术研讨会

作者： Wei YAN faculty of Architectural,Civil engineering and Environment,Ningbo university,Ningbo,zhejiang 315211,china Jin-biao CAI,Wei-qiu CHEN Department of Civil engineering,zhejiang university,hangzhou,zhejiang 310058,china

This paper focuses on the delamination detection in composite beams using electro-mechanical impedance(EMI) signatures,which is directly related to the structure’s mechanical impedance.A model of a laminated beam including a delamination as well as installed PZT transducers is ***,the model has to take into account the dynamic behavior of the piezoelectric patches and simulate the presence of the imperfect bonding between the PZT patch and the host laminate based on a classic shear lag ***,an analytical expression of impedance involving information on the size and the position of a delamination in this coupled smart structure system is derived via the reverberation matrix method(RMM).Comparison with existent experimental and numerical results is presented to validate the present *** numerical simulations allow us to study more closely the influence of some geometrical parameters such as sensor size and *** analysis in this paper provides necessary theoretical basis for delamination detection in composite structures.

关键词： Composite beams delamination electro-mechanical impedance(EMI) reverberation matrix method(RMM)

Dynamic Simulation and Analysis of Planetary Transmission of Ultra-precision Planar Polishing Machine

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Dynamic Simulation and Analysis of Planetary Transmission of...

The 7th International Conference on Computer-Aided Industrial Design and Conceptual Design (CAID&CD’2006)

作者： Zhao Yanwei Wen Siwei Guo Mingfei Ye Yongwei (The MOE Key Laboratory of mechanical Manufacture and automation of zhejiang university of technology hangzhou zhejiang 310032)

Planetary transmission of ultra-precision planar polishing has crucial effects on polishing path and quality. It studies the PE-1 style of ultra-precision double sided polishing machine. Combining with three-dimensional model in SolidWorks, the virtual prototype of the planetary transmission system is established based on ADAMS. The veracity of VP is validated by dynamic simulation. It analyses the relationships between the contact force changing and angular velocity. It provides advantage for further studies on mechanical polishing process.

关键词： ultra-precision double sided polishing planetary transmission virtual prototyping dynamic simulation

EXACT SOLUTION OF ANGLE-PLY PIEZOELECTRIC-LAMINATED CYLINDRICAL SHELL IN CYLINDRICAL BENDING WITH VISCOELASTIC INTERFACES

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EXACT SOLUTION OF ANGLE-PLY PIEZOELECTRIC-LAMINATED CYLINDRI...

庆祝中国力学学会成立50周年暨中国力学学会学术大会’2007

作者： YAN Wei~(*,2)) CHEN Weiqiu~(**) *(faculty of Architectural,Civil engineering and Environment,Ningbo university,Ningbo 315211) **(Department of Civil engineering,zhejiang university,hangzhou 310027)

The electro-mechanical behavior of a simply supported,angle-ply piezoelectric-laminated cylindrical panel in cylindrical bending with viscoelastic interfaces is *** evidence has indicated that the bonding adhesive usu... 详细信息

关键词： exact solution cylindrical shell Kelvin-Voigt viscoelastic model state-space method variable substitution technique

基于改进离散微粒群优化算法的混流装配线多目标排序

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系统仿真学报 2009年第22期21卷 7103-7108页

作者：董巧英阚树林桂元坤蔡纯之上海大学机电工程与自动化学院上海200072 浙江工业大学机械学院杭州310032

产品投产排序是混流装配线有效运作的关键,它是标准微粒群算法无法直接应用的离散空间问题。提出改进离散微粒群优化算法来解决混流装配线多目标排序问题。提出了适应离散编码的粒子位置编码方式,有效避免了不可行解的产生,提高算法效... 详细信息

产品投产排序是混流装配线有效运作的关键,它是标准微粒群算法无法直接应用的离散空间问题。提出改进离散微粒群优化算法来解决混流装配线多目标排序问题。提出了适应离散编码的粒子位置编码方式,有效避免了不可行解的产生,提高算法效率。引入了动态参数及自适应逃逸机制增强了粒子的多样性和搜索性能。分析了装配线参数变化对目标函数和相应投产序列的影响,并确定出了能够获得最优解的合理参数范围。提出评价指标对改进离散微粒群优化算法与基本离散微粒群优化算法进行了对比,对实际混流装配线的仿真实验表明提出的改进微粒群优化算法可以直接应用于离散排序问题,是一种高效的混流装配线排序算法。改进微粒群优化算法与遗传算法的仿真实验对比显示了提出方法在混流装配线排序问题中的优越性。

关键词：混流装配线排序改进离散微粒群优化算法多目标总调整费用总闲置-超载费用

Integrated Control of Semi-active Suspension and ABS Based on Sliding Mode Theory

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Integrated Control of Semi-active Suspension and ABS Based o...

第二十九届中国控制会议

作者： LOU Shaomin 1,FU Zhen 2,ZHANG Lechao 2,XU Cangsu 2 1.College of mechanical and Automotive engineering,zhejiang university of science and technology,hangzhou 3.001.,P.R.china2.Power engineering Department,zhejiang university,hangzhou 310027,P.R.china

An Integrated Controller of semi-active suspension system and Vehicle Anti-lock Braking System（ABS）using a quarter-car model and a single wheel-car braking model is built on the basis of the sliding mode control *** adjusting of the suspension control system aims at improving suspension performance as well as the braking force while *** adjusting of the ABS aims at getting the optimal sliding rate of the wheel and advancing braking *** software is used to verify the effectiveness of the integrated controller in the normal driving condition and the braking *** simulation results show that when in normal driving condition,the Body Acceleration,the Suspension Working Space and the Dynamic Tyre Displacement were effectively inhibited,and the vehicle’s ride and comfort were significantly improved;While in braking condition,the integrated controller can not only effectively prevent the wheel being locked,significantly shortening the braking distance and braking time,but also can improve the vehicle’s *** integrated sliding mode controller shows good control performance.

关键词： Sliding Mode Control Theory Integrated Control Reference Model Semi-active Suspension ABS