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Yu R.,Changzhou Vocational Institute of Engineering | Shi W.,Changzhou Vocational Institute of Engineering
Revista de la Facultad de Ingenieria | Year: 2017

The rolling bearing as one of the important parts of automobile transmission system, its lubricating property and fatigue life directly decides the service life of the automobile, in order to improve the service life of automobile transmission system, the automobile rolling bearing was regarded as the research object, the mathematical model of the automobile rolling bearing was established in the process of movement, the different external load, speed and other parameters on the influence of the rolling bearing lubrication characteristics were studied by the use of the numerical method. The research results show that with the automobile external load increase, the rolling bearing oil film pressure increased, while thickness decreases, it is not all rolling bearing oil film lubrication; with the increase of vehicle speed, the thickness of the rolling bearing with increased, while the oil film pressure decreases, the lubrication condition can reduce rolling bearing wear and invalidation such as agglutination; but as the automobile speed increasing, the rolling bearing working temperature increases sharply, its working condition is worsening, unfavorable to automobile rolling bearing life; which provide important reference for selection of rolling bearing load, speed to realize its good lubrication condition, and prolonging the service life of automobile rolling bearing.

Yu R.,Changzhou Vocational Institute of Engineering
Revista de la Facultad de Ingenieria | Year: 2017

Starting with the design of bench test based on Hardware -In-the-Loop, the principle has been analyzed, the dSPACE simulation system and CAN field were incorporated; a controlling tool has been created with ControlDesk during Matlab/Simulink environment to carry out the Hardware-In-the-Loop simulation analysis and research the quality parameters related to shifting, which can provide the base for improve the development of shifting quality in terms of engineering aspects.

Yan J.,Central South University | Yan J.,Changzhou Vocational Institute of Engineering | Liu S.,Central South University
Proceedings - 2016 International Conference on Robots and Intelligent System, ICRIS 2016 | Year: 2016

In this paper, a fatigue life model of aeronautic rolling bearing made by M50NiL steel was established with Goodman formula and material P-S-N curves, based on Lundberg-Palmgren fatigue life theory (L-P theory) and Hertz contact theory, considered the effect of thermomechanical coupling. The model was mostly related to the maximum Hertz contact stress and material coefficients. To solve the stress by the software of ANSYS, thermoplastic finite element method was adopted, the thermal load was calculated, and the distribution of heat stress was used for boundary conditions of stress analysis, then the regularities of loading distributions under the effect of thermo-mechanical coupling were determined. According to the data above, the fatigue life evaluation method for rolling bearing under varieties of working conditions based on loading spectrum was finally obtained, and an example which proves the method reasonable under one working condition was given, the error with the test value was 11.61%. The results show that the evaluation result calculated by this method is securer than the test result, which indicate that the method is a safe and effective evaluation method of fatigue life. © 2016 IEEE.

Yu R.,Changzhou Vocational Institute of Engineering
Chemical Engineering Transactions | Year: 2015

Considering the parameters of the traditional PID control algorithm are not capable of online adjustment and do not have adaptive capability once they are determined, which can not satisfied the precision control requirement of servo system with complex nonlinear friction, a PID controller based on radial basis function neural network (RBFNN) is designed, the advantages of RBFNN such as infinity approaching nonlinear system, little operation quantity and speedy constringency are combined with PID control technology organically to obtain high position tracking accuracy. The simulate results show that compared with common PID control, the RBFNN PID controller can adaptively adjust the controller parameters, greatly improving the control precision of the system. Copyright © 2015, AIDIC Servizi S.r.l.

Li D.-M.,Changzhou Vocational Institute of Engineering
Conference Proceedings of the 4th International Symposium on Project Management, ISPM 2016 | Year: 2016

The success of enterprises in the future lies in two important elements, flow (reduce lead time) and flexibility (equipment, personnel and product), which require enterprises to continuously carry out lean production VSM based on macro strategy and reduce waste during production. Waste during production usually adopts the form of shotpoint to be promoted and improved in the hope of decreasing total production cycle time (namely increasing flow of enterprise product). Total freight volume management discussed in this paper is a theory to present flow and flexibility of enterprise products based on the product of hauling distance and hauling weight during all production links within total production cycle time under VSM. Total freight volume fully reflects waste and efficiency of VSM during production and is presented to enterprise managers in the form of macro data.

Yu R.,Changzhou Vocational Institute of Engineering
Chemical Engineering Transactions | Year: 2015

Storage battery's thin energy density has directly restricted the industrial development of electric vehicles, the pivotal parameters have been matching based on the theoretical analysis of circulating operation, and combined with genetic algorithm's superior ability, the peak power of motor and ratio of transmission have been optimized with the consideration of dynamic restriction. The results show that the optimized parameter can lead the automobile' driving mileage to increase 18.78% on the basic dynamic requirement of national standard. Copyright © 2015, AIDIC Servizi S.r.l.

Yu R.,Changzhou Vocational Institute of Engineering
International Journal of Control and Automation | Year: 2016

Aiming at the market shares of automatic mechanical transmission, the driving smoothness was studied. Based on the dynamical model of automatic mechanical transmission, the numerical model of automatic mechanical transmission had been established and a shifting strategy was analyzed. The result shows that the impact of automatic mechanical transmission on the condition of shifting fast can meet the national legislation. © 2016 SERSC.

Bao L.,Changzhou University | Chen X.,Changzhou Vocational Institute of Engineering | Yang B.,Changzhou University | Tao Y.,Changzhou University | Kong Y.,Changzhou University
ACS Applied Materials and Interfaces | Year: 2016

Polysaccharides of sodium carboxymethyl cellulose (CMC) and chitosan (CS) were integrated together via amidation reactions between the carboxyl groups on sodium CMC and the amino groups on CS. Compared with individual sodium CMC and CS, the integrated polysaccharides with a mass ratio of 1:1, CMC-CS (1:1), exhibited a three-dimensional (3D) porous network structure, resulting in a significantly enhanced hydrophility due to the exposed polar functional groups in the CMC-CS (1:1). Chiral interfaces were constructed with the integrated polysaccharides and used for electrochemical enantiorecognition of tryptophan (Trp) isomers. The CMC-CS (1:1) chiral interfaces exhibited excellent selectivity toward the Trp isomers owing to the highly hydrophilic feature of CMC-CS (1:1) and the different steric hindrance during the formation of H bonds between Trp isomers and CMC-CS (1:1). Also, the optimization in the preparation of integrated polysaccharides such as mass ratio and combination mode (amidation or electrostatic interactions) was investigated. The CMC-CS (1:1) presented the ability of determining the percentage of d-Trp in racemic mixtures, and thus, the proposed electrochemical chiral interfaces could be regarded as a potential biosensing platform for enantiorecognition of chiral compounds. © 2016 American Chemical Society.

Ji D.,China Pharmaceutical University | He X.,China Pharmaceutical University | He X.,Changzhou Vocational Institute of Engineering | Zhu Q.,China Pharmaceutical University | Xu Y.,China Pharmaceutical University
Organic Letters | Year: 2016

An efficient and facile process was developed for the remote C-H bond amidation of 8-aminoquinoline scaffolds on the C5 position which is geometric. The method only made use of PhI(OAc)2 as a mediator and showed good tolerance toward numerous dibenzenesulfonimides and amides, giving the corresponding products in moderate to excellent yield. © 2016 American Chemical Society.

Wu Y.,Changzhou Vocational Institute of Engineering | Wei Y.,Nanjing University of Aeronautics and Astronautics
Hanjie Xuebao/Transactions of the China Welding Institution | Year: 2015

The first intelligentialized welding CAPP system was developed by combining expert system based on the current research situation of welding CAPP at home and abroad. This system can complete welding document preparation with its welding process design module, process cards compile module and material cost quota calculation module. Welding process design module can deduce welding process parameters based on welding knowledge base, welding inference engine and welding explanation facility. There are three ways to compile process cards: the typical procedure method, the similar procedure method and the menu method. Thus the user can complete the work easily and fast. By parametric groove and iteration method, the total and every layer consumption of multi-pass welding can be calculated. ©, 2015, Harbin Research Institute of Welding. All right reserved.

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