Advanced Materials Research Vols. 765-767

Abstract: The 5-DOF man-vehicle-road coupled vibration model is established by the relationship among three interactions of man-vehicle-road and the vibration differential equation of the 5-DOF man-vehicle-road model is obtained by Newtons method. The mathematical model is conversed into the derived simulation model based on MATLAB/SIMULINK software. The vibration characteristics of the 5-DOF couple model are analyzed by the excitations of ride speed and random road surface roughness time series since the corresponding parameters have been set. The paper demonstrates the acceleration curves and their response characteristics of the bodywork and man-chair system. The study results have a guiding significance and reference value to analyze the vehicle ride comfort.

Abstract: In this paper, kinematics analysis software ADAMS/Car was used to establish the FSAE car racing double wishbone independent front suspension simulation model, kinematics simulation analysis has been used to get the wheel beats of each parameters variation. For the simulation results, part of the suspension of the hard points position have been optimized by ADAMS/Insight module, to improve the characteristics of the suspension movement.

Abstract: Transmission shaft is an important component of automotive transmission, parts of which are facing the problem of fatigue failure. This paper mainly analyzed the performance of the transmission shaft based on finite element method. Firstly, stress contour is obtained of the shaft. secondly, get the fatigue performance according to material S-N curve. Finally, The dynamic characteristics including vibration modal and frequency response are analyzed. The results can provide reference for dynamic design of transmission shaft , as well as the structure optimization design of the transmission shaft .

Abstract: Computer simulation was used to study WSP (Wheel Slide Protection) system in this paper. The model of WSP system was built. Simulation model can avoid real vehicle tests or laboratory bench which will cost a lot of time and expenses. The WSP system model was composed of pneumatic model, mechanical model and control model. Three models were connected with each other and formed a closed loop system. The result shows that the simulation model has most characteristics of WSP system. The model can be used in the study of WSP system instead of the real system.

Abstract: Based on the geometry of the cutter, the dynamic force model of face milling was established. Meanwhile, the fast and effective identification method of milling force model coefficients was provided, which combining the virtues of both orthogonal design theory and partial least-square regression (PLSR) method. Milling experiments have been conducted to verify the proposed face milling force model. Good agreements between the experimental and simulated results were presented.

Abstract: A 7-DOFs vehicle dynamics model which includes active suspension system (ASS) is established, and a LQR controller for active suspension system was designed based on optimal control theory. The simulation models for active suspension system and passive suspension system were built, and a simulation experiment was carried out with MATLAB/Simulink Software. The simulation results show that the optimal control of active suspension system can reduce vertical, roll and pitch accelerations of sprung mass, and the vehicle ride comfort and handling stability were improved effectively.

Abstract: In order to accurately characterize the lateral dynamic characteristics of articulated heavy vehicle, 3-dof simplified yaw model of articulated heavy vehicles is established and key parameters of models are identified by genetic algorithm. MAPs of key parameters, which the vehicle speed and steering wheel angle are independent variables for, are formed using the key identification parameters. Simulation study of dynamic state is carried out by the MAPs of key identification parameters and 3-dof simplified yaw model. That simulation result compared with Trucksim data indicates that key parameters can be accurately identified and the MAPs of key identification parameters satisfies the need of characterizing the actual state of vehicle.

Abstract: Co-simulation based on LMS Virtual.Lab Motion and Imagine.Lab AMESim was used on aircraft cabin door hydromechanical drive system design. By analysis of 1-D hydraulic model and 3-D mechanism model co-simulation, we draw the conclusion that over-running load accounts for hydraulic motor over speed. To improve hydraulic system, the one-way throttle valve was employed to balance the over-running load according to the co-simulation results. Subsequently, the co-simulation outcome showed the improved-designed hydraulic system controlled the over-running load more effectively. Therefore, a convenient, reliable and accurate method of hydraulic system based on over-running load balance was available.

Abstract: In order to analyze dynamical strength reliability of mechanism, in taking the component section sizes, the material strength, the material density and acceleration of gravity as the random variables, and basing on the movement analysis and the dynamical analysis while taking the Assur-Group as the unit, the method of dynamical strength reliability analysis for the crank-rocker mechanism was established. The example was analyzed with using Monte Carlo (MC) method. The result indicates that computing speed of this method is high, precision of this method is high, and it has good universal property. It can be used in scientific research and the engineering practice.

Abstract: Computer integrated manufacturing, CIM, has attracted many interests both in academic research and practical implementation. Design and implementation of a CIM project involves the massive modeling, simulation, and verification of production operations, machines, and operators. Overhead hoist transporter, OHT, is one of the effective tools for the automated material handling system that often applied in CIM projects to ultimate the utilization of footprint of a factory. This paper presents a case study for the OHT system design in a CIM project for automated food processing production line. The effectiveness of the number of OHTs installed for the production line and the proper operation scenarios for different production planning are studied. Modeling and simulation results are performed to suggest an efficient OHT system design for the CIM project.