摘要：
According to the requirements of dynamic design for high-speed and heavy-loading marine gear, in view of slotting processing advantages, modification profile slotting cutter used to achieve modify high-speed and heavy-loading marine gear, and the modification profile of slotting cutter designed to the profile which consists of multiple segments of different profile shape profile angle, the modification profile angles of slotting cutter corresponding sections of involutes deduced using the profile angle error analysis theory, modification profile of slotting cutter precision designed based on engagement principle of slotting gear.
作者机构：
School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou,Guangdong 510006, C;School of Mechanical Sci.&Engin.,Huazhong Univ.of Sci.and Technology,Wuhan 430074,China;University of South China, School of Mechanical Engineering, Hengyang, China, 421001
会议名称：
2011 International Conference on Mechatronics and Materials Processing(2011年机电一体化与材料加工国际会议 ICMMP)
会议时间：
2011-11-18
会议地点：
广州
会议论文集名称：
2011 International Conference on Mechatronics and Materials Processing(2011年机电一体化与材料加工国际会议 ICMMP)论文集
关键词：
Stiction;Control valve;Detection of loop;pv-op plot
摘要：
Stiction is a common problem in spring-diaphragm type valves, which are widely used in the process industry. A non-invasive method for detecting and quantifying stiction in control valve has been presented in this paper. Although there have been many attempts to understand and detect stiction in control valves, none of the current methods can simultaneously detect and quantify stiction. The method first detects nonlinearity in a control loop by the use of the sensitivity of the normalized bispectrum or bicoherence to the nonlinear interactions that may be present in the control error signal.If nonlinearity is detected, then controlled variable(pv) and controller output(op) signals are filtered using frequency domain wiener filter to obtain filtered pv and op signals.This work describes a model free method that can detect and quantify stiction that may be present in control valves using routine operating data obtained from the process. No additional excitation or experimentation of the plant is required.
摘要：
This paper utilized self-made high-frequency micro-forging machine to treat NiCrBSi alloy cladded by laser, Optical Microscopy(OM) to study geometric characteristic of plastic deformation, OM and SEM to observe influence on surface microstructure and cracking behavior of the laser cladding layer under micro-forging. The results have shown that: Regularly dendrite microstructure, which is peculiar of laser cladding layer, was broken into pieces. Cracking behavior of laser cladding layer improved greatly.
会议论文集名称：
2011 International Conference on Mechatronics and Materials Processing(2011年机电一体化与材料加工国际会议 ICMMP)论文集
关键词：
Inspection and test instrument;Radial direction displacement precise;Round shape part;Labview
摘要：
In the past, the instrument in the test station is usually using analogy technology, the testing and inspecting with the device executed with discrete and isolated way, in order to improve the efficiency and effectiveness, the digital instrument of radial direction preciseness for round shape part is designed and composed based on Labview in this research. The mechanic section of this instrument is an inspection device, the acquisition section use the acquisition module of NI, the software of the instrument is developed with Labview. The instrument is fitted to apply in the shop floor of factory.
作者：
Chen, G. J.;Chen, Y. M.*;Tan, Y. Y.;Liu, X. W.
作者机构：
[Chen, Y. M.; Chen, G. J.; Liu, X. W.; Tan, Y. Y.] Hunan Univ, Coll Civil Engn, Changsha 410082, Hunan, Peoples R China.;[Chen, G. J.] Univ South China, Coll Mech Engn, Hengyang 421001, Hunan, Peoples R China.
会议名称：
The 7th International Symposium on Heating,Ventilating and Air Conditioning(第七届采暖通风与空气调节国际会议 ISHV AC 2011)
会议时间：
2011-11-06
会议地点：
上海
会议主办单位：
[Chen, G. J.;Chen, Y. M.;Tan, Y. Y.;Liu, X. W.] Hunan Univ, Coll Civil Engn, Changsha 410082, Hunan, Peoples R China.^[Chen, G. J.] Univ South China, Coll Mech Engn, Hengyang 421001, Hunan, Peoples R China.
会议论文集名称：
The 7th International Symposium on Heating,Ventilating and Air Conditioning(第七届采暖通风与空气调节国际会议 ISHV AC 2011)论文集
摘要：
Problems involving heat and moisture transfer in porous building envelope arise in a number of engineering interests, such as cooling/heating load calculating of air conditioning, indoor environment controlling, managing of thermal performance of the envelope and so on. This paper is mainly about the significant efforts that have been made to mathematically model the coupled flow of heat and mass that occur in the porous building envelope. After showing the problem in a schematic view, this paper presents a review of the development of modeling for coupled heat and moisture transfer. And a one-dimensional model was proposed. Vapor content and temperature were chosen as the driving potentials. The numerical solution was based on the control volume finite difference technique with fully implicit scheme in time. A comparison between experimental results and the results obtained by the numerical model proves that they are fully consistent with each other.
摘要：
As the constantly growth of embedded Technology, embedded products put into use in almost everywhere around our life. This paper mainly introduce how to set up the Qt/Embedded Cross-compiling environment in Linux system platform, and the development and transplant of embedded fault diagnosis system use development tools of Qt/Embedded. This system achieve those functions, including fault display, signal analysis, diagnostic model training and data storage or transmittal, by graphical interfaces designing and performance function addition. And finally create the application document which applies to ARM framework embedded processor by Cross-compiling. In the end, the application document is transplanted and run in the target platform, and testing the diagnosis effects.
