Papers by Author: Cheng Long Wang

Abstract: In order to satisfy the practical requirement, Durability test-bed for new developed hydraulic pump is designed which mainly includes design of hydraulic systems, design of data acquisition and processing system and design of test bench and electronic control system. According to application, it shows that the Durability test-bed is effective for durability test of new developed hydraulic pump and it can help to improve the design of hydraulic pump

Abstract: An energy recovery method during the durable test is put forward in this essay, and the durable test-bed of the hydraulic pump is developed. The efficiency and accuracy data acquisition is realized by using High-Speed High-Resolution sensor and data collection module. Control automation is come true by using PLC, industrial tablet PC and electric command device. The instrument panel constructed by LabWindows/CVI made the operation more concision, flexible and easy-to-use. This test bed has been put into use for a year and shows that the system can realize duration and efficient test of hydraulic pump easily and reliable.

Abstract: In this paper, a hydraulic excavator is used as an example, and a model of the hydraulic circuit of the excavator arm is established using the graphical modeling method of EASY5. Through the simulation and analysis of the results, it can be seen that the simulation results can accurately simulate the dynamic characteristics of actual hydraulic circuit, and show the variation of the pressure in the hydraulic cylinder chambers. It not only provides a basis for the system performance analysis and the further improvement, but also provides a new method for the optimization design and overall performance analysis of the engineering machinery hydraulic system. And it also provides a new idea of design for the development of new product.

Abstract: Basing on the introduction of Multidisciplinary Design Optimization (MDO), Multidisciplinary Design Optimization method based on iSIGHT is given, which includes one general process model and one optimization algorithm. Optimization of one bearing is selected as one example. According to its application, it approves that MDO methods can solve practical engineering problems more effectively because of comprehensive consideration of the internal problems in all disciplines.

Abstract: Different with the traditional expert classification of building ontology, Web-platform folksonomy is used to analyze the tagging of mechanical components in the networked and collaborative environment. And according to the combination of tags of mechanical components and ontology technology, the ontology model is given based on one instance by protégé to reveal the information characteristics of mechanical components more realistically and more completely. With the trend of realization of manufacturing informationization, the mechanical components ontology provides a contribution to the communication, sharing and knowledge reusing of mechanical products.

Abstract: In large inclined angle mining condition, in order to decrease the effect of sliding force, a lightweight design for hydraulic support is presented in this paper. Taking minimum mass of top beam as optimization objective, the three-dimensional model of it is built firstly. The whole top beam is simplified into top plate, side plate, bottom plate and main reinforcement on the premise of unchanging its topology configuration, and only strength constraint is chosen as constraint, which reduces the number of constraint functions and calculation cycles. By means of ANSYS zero-order optimization module, the mass of top beam is decreased about 16.9%. Finally, the optimal lightweight structure is fully evaluated under the same load as pre-optimization, and finite element analysis results prove that its stress and strain satisfy the need of strength. This lightweight design measure is used in the practical manufacturing with a lower cost of materials, which also increases the stability of hydraulic support in large inclined angle mining condition.

Abstract: The development process of vibration roller is a collaborative and concurrent process involved with mechanics, electronics and hydraulic disciplines. Poor collaboration among multiple design disciplines can result in frustrating re-work, delayed product launches, blown budgets and sometimes even expensive recalls of shipped products, which is a big challenge to vibration roller development for the traditional Chinese manufacturing enterprises.Workflow technology in vibration roller development is studied and applied in this paper. A workflow model is given, which comprises team member management model and process model. Team member management model defines the organization, the role and the authority of integrated product team (IPT) members involved in the development process of vibration roller. Process model described the general development process of vibration roller, which includes activities, roles related to activities and rules in detailed. According to the models defined above, new workflow software, which is named “Workflow Management System for Mechatronic System” is developed and used to implement the workflow of “the cooperative development of Vibration roller (YZ18JA) of ChangLin Company”. Practice indicates that the implementation of workflow technology can ensure that right information can be delivered to right person at right time in a right way so as to improve the management and control of the whole process, shorten product development cycle and reduce cost.

Abstract: Workflow technology in multiple-disciplinary system development is studied and applied in this paper. After the problems during the process of multiple-disciplinary system development are analyzed, workflow technology in multiple-disciplinary system development is studied and the method of overall using workflow technology in multiple-disciplinary system development process is given. Finally an example is presented for application, which shows validity of this method.

Abstract: Plug-in hybrid electric vehicles (PHEVs) have been seen as promising vehicles which have merits of hybrid electric vehicles and electric vehicles. Because of difficulties of plug-in hybrid electric vehicles’ development, it is necessary to study revamped method on the base of original car. Electric power steering (EPS) is an advanced steering system that uses an electric motor to provide steering assist. Because PHEVs are often on electric-electric operating mode, steering system power should be supplied with electric motor. Also, reconfigration of the power system including batteries results in added weight and the load change on front axle and rear axle. The steering characteristic of the revamped car are different from that of the original car. Based on the analysis and actual size, mass-force, etc. of the overall car and the parts of EPS, the multi-body dynamic model of the car equipped with EPS is established with multi-rigid-body dynamics analysing software (ADAMS). Based on the virtual prototype, simulation of steady state steering characteristic and transient state response characteristic of revamped car compared with original car under angulus step input of steering wheel have been finished. According to the simulation results, steering characteristic of the revamped car meets the design requirements. The research method is feasible.

Abstract: The technologies of expert system, ontology modeling and reasoning are studied and applied in this paper. A framework of ontology-based expert system for equipment selection and matching in fully mechanized caving face is built up. The OWL(Web Ontology Language) based equipment knowledge base is set up, and the redundant test is made in the protégé environment. The equipment selection and matching rules are built up by using SWRL(Semantic Web Rule Language). By using JAVA language, the output of equipment selection expert system is optimized based on the theory of Analytic Hierarchy Process. At last, the functions of the expert system are achieved under JESS(Java Expert System Shell) environment. Practical application shows that the equipments selected and matched by ontology-based expert system are more realistic.