Simulation Analysis on Decreasing Vibration of Motorcycle Engine Suspension System

With the development of high-speed and high-power, the motorcycle vibration from engine become one of the major factors affecting the performances of motorcycle. Elastic suspension structure is adopted between the engine and frame for the vibration during the process of designing a certain type of motorcycle with 200 cc engine in some enterprise.Through optimization of the suspension system performance parameters, inherent frequency of suspension system keeping away from the activated frequency of engine in common use is essential. Isolation performance is improved and the vibration is solved. As a result, the comfort is improved.     

Sensitivity analysis of a motorcycle frame using the Monte Carlo method

Sensitivity analysis of motorcycle frames is useful for improving the design success rate. Based on sensitivity analysis theory and using the Monte Carlo and numerical simulation methods, a new 250 type integral motorcycle model was built and dynamic sensitivity analysis conducted. Sensitive design parameters that have great influence on frame vibration were discovered. By modifying the values of sensitive design parameters, the vibration of some measuring points was reduced. This reduction shows that the sensitivity analysis method is reliable and practical, and it can be used in sensitivity analyses of other complicated structures.     

Intelligent CAD/CAE''s System of Motorcycle-design

Takes the motorcycle system design as the target , and researched motorcycle total scheme design and total layout design and kinetics matching optimization to design, KBE's technique , CAX's technique , PDM's technique and to target and so on technique is used in the synthesis , and intelligent CAD/CAE's system of the motorcycle system design work distance traveled by a stream of water and the architectural structure and integrated technique of every application sub system meritorous service capacity composition and CAD/CAE/CAT has been underway research, Open up a model system , and still unite the fund motorcycle produce development , and verifies.     

Influence of Motorcycle Noise on Gear Transmission

The study of motorcycle's acoustic signal shows that gears noise take a great proportion on the whole acoustic of motorcycle.So how to control the noiseof gears is very helpful for reducing the whole motor's acoustic.This paper discusses the engine matching with transmission system in reason,primary transmission and gear geometry design parameter & the mend of tooth body(tooth form & tooth direction) how to influence the acoustic of motorcycle.The study shows that the gear transmission System's matching with engine in reason can notable improve the efficiency of motorcycle.In the meaning time the exactly choosing the primary transmission gear geometry design parameter and the mend of primary transmission gear's tooth body can effectively reduce the acoustic of motorcycle.This paper has engineering practice sense.     

Parameterized Design System of Motorcycle Based on Adams Virtual Prototyping Technology

This paper uses motorcycle as the research object and uses ADAMS/View as tools to deal with the inconvenience of constructing Motorcycle simulation model in ADAMS/View.The parameterized design system of Motorcycle is developed according to the requirements of simulation model by using ADAMS/View secondary development technology.The system has solved very complicated problem of motorcycle modeling in ADAMS/View,whose spatial structure is very complicated,and solved the problem of model imported by other CAD software which has information lose,model scale tends to heavy,follow-up simulation difficult and so on.The system is used to make the simulation model in ADAMS/View easier for follow-up simulation according to the basic dimension of Motorcycle and user's needs,and shorten the development period of the motorcycle,reduce the development cost,and carry on the series design.     

Analytic Method for the Free Vibration of Plane Frame Structure

The analytic method for the free vibration of plane frame structure is presented. It is achieved by transforming the general eigenvalue problem of natural frequency and vibration mode of continuously distributed property system into typical boundary value problem of ordinary differential equation (ODE). A series of ODE, corresponding to the general eigenvalue problem, is formed, and then is solved by an general ordinary differential equation solver-COLSYS. Each component of a frame structure is regarded as an element in the analytic method. This makes it more efficient than that of finite element method which needs to increase elements to get the value of high-class natural frequency and vibration mode accurately. Some applications of the method show that it can solve the free bending vibration of plane-frame structure with various types of displacement constraint. The result indicates that this method is precise and efficient.     

A Develop Mode Of The New Type Motorcycle

This paper introduced a develop mode of new type motorcycle. Based on research on apply techniques of general design products with ATOS,RP and PRO/E, idea design,structure design and entity dynamic embnator, celerity collection data to expedite rate of esse sculpt, manufacture of prompt pattern and small batch mould was researched, and the corresponding methods of tap mode of new motorcycle are proposed to meet the demands of products prompt development.     

Integration framework and implementation technologies of integrated workshop production management system for motorcycle parts enterprise

According to the urgent need for motorcycle parts enterprise to improve the ability of information exchange and business collaboration between the production process and other links such as the marketing, design, production planning, outsourcing, purchasing and delivering, an integration framework of the intergraded workshop production management system for motorcycle parts enterprise is presented. It can be integrated with the designing and production planning management systems upwards, the workshop equipments and workers downwards, and the subcontract production and supply chain management systems outwards. Then, some key technologies are studied, such as the realization scheme of system integration based on Service Oriented Architecture (SOA), the data integration and sharing mechanism of heterogeneous information system based on eXtensible Markup Language (XML), and the real-time interaction technology of workshop information based on the multi-functional interactive information terminals, etc. Finally, the system is developed and successfully applied in a motorcycle parts enterprise, and good results are obtained.     

云制造资源语义描述和服务匹配策略

针对云制造环境下资源语义描述和服务匹配问题,在充分考虑用户个性化需求与制造资源异构性的基础上,分析了云制造资源描述和服务匹配的难点,利用规范化描述的特点,将制造资源描述问题转化为Web语义描述问题,提出一种通用的制造资源语义描述框架。结合4种相似度算法,设计了阀值和权重,提出了基于过滤器的服务匹配策略。实验结果证明了该策略和算法的有效性和可行性。应用这4种相似度算法能够有效缩小匹配的规模,提高了服务的查找效率与准确度。     

京承农业合作案例研究

从市场需要,北京农业的特点、产业结构调整以及京承农业资源互补等角度分析了京承农业合作的动因。回顾了京承农业合作的历程,总结了京承农业合作的特点、成效和经验,提出京承农业合作是破解环京津贫困带问题的一个有效途径,是环渤海地区农业合作的典范。认为京承农业合作已经初步形成了模式,并提出把京承农业合作进一步拓展为"国家支持、市场主导、政府推动、企业主体、社会力量参与、一体化运作、农民受益"模式的建议。     

Fingerprint Identification Using Point Pattern Matching

Fingerprint is those lines distributing on the finger surface. It's unique and stable. It has been hundreds years to use fingerprint to identity. AFIS (Auto Fingerprint Identification System) has been widely used. Besides traditional criminal, AFIS has been used to validate user in OS and web access, and embedded AFIS also has been used in ATM, credit card and door-lock. Fingerprint matching is one of the most important problems in AFIS. In general, the minutiae such as ridge endings and ridge bifurcation is to be used to represent a fingerprint and the fingerprint matching through minutiae matching. Based on this observation and by representing the minutiae as a point pattern, an automatic fingerprint verification problem may be reduced to a point pattern matching (minutia matching) problem. Point pattern matching is a famous problem in the field of pattern recognition. For a good point pattern matching approach, it is able to perform the geometrical invariant quantities (translation, rotation, and scaling) efficiently. Various algorithms have been proposed for point pattern matching. For example, the relaxation approach handles translational difference only and the complexity of triangles approach is very high. In this paper, an algorithm for fingerprint identification using point pattern matching based on cluster approach is proposed, which effectively solves the problems of optimal matching between two fingerprint minutiae images under geometrical transformation and minutiae quantity change. Process which bases on the matching of vector pairs is developed to determine the registration parameters. The experimental results show that the proposed matching algorithm is fast and has high accuracy.     

An Electronic Fuel Injection System Based the Monolithic Processor of MC68HC08

According to the motors working principle, the authors design and complet an electronic fuel injection system based the monolithic processor of MC68HC08. Then the authors complete a matching experiment of single-plunger fourstroke engine CG125 applying this system to the trestle. As the system used, fairly well has been settled the contradiction among the driving force of engine, the economization of fuel consumption and the letting of exhaust gas. After the testing, the power of motorcycle engine has increased about 10%, the oil consumption has decreased about 15 %, and the exhaust gas has decreased about 20%,     

Reasoning Method Based on Motorcycle Design

According to the needs of setting up a professional system based on motorcycle design,the CBR(case based reasoning) and RBR(rule based reasoning) methods are introduced.After discussing the difference between the two kinds of reasoning,a method of integrating them into the motorcycle design flow is put forward to realize the design reusable technology and improve the design efficiency,by using the CBR in the step of selecting the similar motorcycle and the RBR in project's modification according to correlative rules.     

Design and Optimization of VVT System Parameters for Motorcycle Engine

An original variable valve timing mechanism with two-mode intake timing was developed according to the structural characteristics of small medium displacement motorcycle engine. Based on cycle simulation, the effects of the VVT mechanism structural parameters, control parameters and operational parameters on the engine performance were analyzed by embedding the VVT mechanism operational mode and control strategies in the engine cycle simulation. Optimum design for the late intake valve closing, the valve lift, as well as the switching speed of the VVT system was carried out. It has been proved that power and torque of the JH125 motorcycle engine can be effectively improved by loading the new type VVT system.     

Improved Modal Capacity Spectrum Method for Estimating Seismic Performance of Structures

Performance-based seismic design involves how to confirm inelastic displacement demand of structures under earthquake in concise and reasonable way. Two shortages need to improve in analyzing the elastic-plastic seismic responses of structures if the traditional capacity methods are employed. The shortages are the uncertainty of equivalent high damp of elastic-plastic structures and the limitation of the higher order vibration mode effect being not taken into account. To solve these problems, the authors propose the concept and analyzing process of improved capacity spectrum method based on modal pushover analysis and the elastic seismic responses spectrum modified by strength reduction coefficient and ductile coefficient. The example of analyzing the performance of frame structure is shown which may be a simple and effective method used in engineering. This method has application potential in Performance-based seismic design.     

Analysis and Research on VVT System Control Strategy for Motorcycle Engine

An original variable valve timing mechanism with two-mode intake timing parameters is developed according to the structural characteristics of small-medium displacement motorcycle engine. Based on cycle simulation, a cycle simulation model of VVT mechanism for motorcycle engine is created. The control strategy of variable valve timing and lifting running-model are carried out at idle speed low negative load, middle negative load, low speed high negative load and high speed high negative load. It has been proved that the performance of JH125 motorcycle engine can be effectively improved by loading the new type VVT system.     

YS-YGQ-1A型烟秆清理机的设计与试验

为了解决人工清除烟秆劳动强度大且烟蔸根系出田不彻底的问题,实现保护性地将烟秆连同根系清除出烟田,满足次年烟草连茬种植需求。通过理论分析和试验探索,研制出与DF-151型或工农-121型手扶拖拉机配套的YS-YGQ-1A型烟秆清理机。该机采用骑垄前行作业,由挖掘转子反转挖掘将烟秆连同根系掘起,输送转子振动去除根系附土并传送到集料斗,然后集中倾倒在烟田成堆摆放。通过性能检测和验证试验,该机田间通过能力较强,各项性能指标达到设计要求且符合烟草农艺需求。该机作业效率达0.91 hm2/8 h且性能稳定,能显著提高生产效率、降低劳动强度和作业成本,且能降低拔秆后烟田旋耕作业成本。     

A Key Technology in Automatic Fingerprint Identification System:Directional Image

Because fingerprint directional image represents the basic structural feature really and abstractly, It has very important research value in automatic fingerprint identification system. Now it has been widely used to solve the problem of image enhancement, global feature extraction, automatic classification, template matching and image encoding. Especially the Gabor filter based on directional image gets a marvelous effect, which can filter the noises along ridges. Combining the author's research work, several newly developed methods to get directional image are introduced. The performance of real-time and robust to noise of these methods are assessed,and the mending methods are presented also. In the end, the typical applications are systematically overviewed and the direction for further study is provided.     

Product Development Method Based on Product Development Domain

Product development is an integrated and interactive process. This paper proposes that there are three domains in the process of product development, i.e. product domain, organization domain and process domain, viewed at three angles of product, organization and process of product development. It is proposed that product domain is the core of these three domains, and then gets interrelations within them. The method of classifying parts and components in product domain is put forward, and the corresponding organization domain and process domain are put forward. The direction of parts and components domain is pointed out. In the end, this paper gives an example applied to the method in a motorcycle enterprise.     

YS-1GVFM-125A型起垄施肥铺膜联合作业机的设计与试验

为了解决烟草耕整地与施肥、覆膜时多道工序重复用工的问题,实现机械化作业,降低劳动强度,提高生产效率。通过理论分析和试验探索,研制出与东风-151型或工农-121型手扶拖拉机配套的YS-1GVFM-125A型起垄施肥铺膜联合作业机。该机采用反转旋耕起垄、搅笼输送施肥、压槽盖土覆膜,能在平板田上进行一次性起垄、施肥、覆膜联合作业。通过性能检测和试验验证,该机作业效果基本能达到烟草农艺要求,能极显著提高作业效率、降低劳动强度和作业成本,且对烤烟产质量不产生明显影响;使用该机进行耕作,无需调整施氮量、氮肥基追肥比等烤烟施肥措施,提早施肥耕作时间不宜超过移栽前30天;但该机对耕作土壤水分要求较普通起垄机稍高。