Applied Mechanics and Materials Vols. 300-301

Abstract: The rise of the Flexible Manufacturing System (FMS) and the Computer Integrated Manufacturing System (CIMS) put forward a more urgent need for the practical fixture design software. 3D Visual Basic-based standard parts library is proposed in this paper. By calling the Application Program Interface (API) functions of Solidworks as the secondary development, the 3D standard parts library is established. And then the application program is made as plug-in to hanging onto the menu of Solidworks operating environment. When the assembly design starts, users can select the standard parts they need by clicking Solidworks menu. And then the application program can automatically query all the data required for drawing pictures. Finally the 3D entities of standard parts are generated so that they can be adopted for the assembly environment.

Abstract: According to the operating requirements of the linear range-extender used in range-extended electric vehicle, as well as structures and performances of the self-developed linear engine, a tubular permanent magnet (PM) linear ISG is designed. The impact of varying electromagnetic structure on the performance is studied by finite element analysis (FEA) in electromagnetic field. On that basis, optimum structural parameters for the linear ISG are determined using multi-objective optimization. The results show that the self-designed linear ISG can meet the performance requirements. After optimization, the output power increases 8.7 percent; the no-load induced electromotive force increases 12.1 percent; the standard deviation of detent force shows a 94.6 percent reduction; the efficiency basically remains constant.

Abstract: This paper introduces a BP algorithm which with the help of added multiple momentum terms can adjust network weight value online directly. This algorithm overcomes the classic BP network’s disadvantages, such as slow convergence rate and easily fall into local minimum, and apply the improved BP-PID algorithm to hot strip mill gauge control system. The simulation result proved that this algorithm has fast convergence rate and strong adaptive ability. So it is suitable for adjust PID parameters online.

Abstract: Customers’ individual and rapid product customization demands for 2K-V series reducers are taken as the study background. The rapid modeling method of the product skeleton and the parametric design method of the product level are studied. Products’ assembly models and templates of products’ skeleton models for series products are created on the basis of analyzing the structure similarity. Through changing parameters’ values of the skeleton template the product’s assembly model can be updated automatically and this template is rapidly transformed to the product instance so as to realize the rapid variant design. The above method not only is effective to 2K-V series reducers but also has reference value to others series products’ design.

Abstract: Taking Bracket sets as an example, we have discussed the construction methods of BIM-based Information model of the ancient architecture components. First, to build the three-dimensional model of the bracket sets with the method of CSG, and then write the information in the model with the technology of extended data and data dictionary, and to built Information model of the ancient architecture's components, at last we have given the key code to achieve it. The information model meet the rule about the ancient buildings’ modulus, it can be used for the measurement of existing ancient buildings, the repair and reconstruction of the ancient architecture, the design of antique architecture.

Abstract: A new hybrid power system with the “power grid-battery-ultracapacitor” was presented. The coupling relationship between the new hybrid power system and train driving was studied on the basis of considering the coupling relationship between train dynamics and the new hybrid power system. A traction simulation system was established. It could be used for traction simulation calculation on hybrid power train. It provided support for dynamics analysis of the new hybrid power train, design and optimization of the new hybrid power system and optimization of the train operation. In the end, traction simulation calculation for hybrid power train was done with actual line. The calculation results provided strong support for the development of the hybrid power train.

Abstract: In order to improve efficiency of Electro-Hydraulic regenerative braking system on electric bus, this paper will analysis dynamic performance and typical driving condition of electric bus based on ADAMS to establish electric bus simulation model and AMEsim to built hydraulic regenerative braking system simulation model. After simulation, displacement of Pump, volume and working pressure of accumulator, ratio of driving coupler will be optimized. The acceleration performance of electric bus will be enhanced obviously after applying hydraulic regenerative braking system.

Abstract: Ocean wave energy is one kind of potential renewable energy that its energy density is far greater than solar energy or wind energy. This paper put forward a new method of using wave turbine to absorb wave energy, then output mechanical energy through mechanical drivers to generator, finally convert to electric energy by generator. Generally, structure design of the wave-wing is very important to the device. It is the important component of the device for absorbing wave energy. For this study, we design the 3D modeling of the new wave power device through SolidWorks software, and generate the wave turbine on proportion of 1:1. We have tested the wave turbine in the pool of the laboratory and obtain the torque and power under certain conditions.

Abstract: For empirical mode decomposition (EMD) of Hilbert-Huang transform (HHT) exists the problem of mode mixing. An analysis method based on ensemble empirical mode decomposition (EEMD) is proposed to apply to fault diagnosis of rolling bearing. This paper puts forward, after signal pretreatment, applying EEMD method to acquire the intrinsic mode function (IMF) of fault signal. Then according to correlation coefficient for IMFs and the signal before decomposing by EEMD method, some redundant low frequency IMFs produced in the process of decomposition can be eliminated, then the effective IMF components are selected to perform a local Hilbert marginal spectrum analysis, then fault characteristics are extracted. Through the vibration analysis of inner-race fault bearing it shows that this method can be effectively applied to extract fault characteristics of rolling bearing.

Abstract: This paper proposes a multi-link algorithm to analyze the walking stability of a self-fabricated, full-size, biomimic, android robot. The stepping trajectory is prescribed and navigated along a horizontal plane without slipping motions and variable center of gravity. However, it may encounter different circumstances for less number of LDOF. Traditionally, walking equilibrium can be assured based on the stabilizable conditions of the dynamic structure of 5-7 leg-degrees of freedom (LDOF). Various kinks of the walking structure are analyzed with the loading effects of the upper-body on the robot. The multi-link fuzzy-logic controller (MLFLC) is also proposed to stabilize the multi-LDOF walking system. Finally, Lyapunov stability can be successfully assured using the proposed controller under the assumption of the theory of the dynamic zero-moment points