Using magnetorheological (MR) fluids in hydraulic engine mount for damping vehicle noise and vibration is opposed firstly, the structure of passive type and its mechanical model are described. The analysis of the expe...Using magnetorheological (MR) fluids in hydraulic engine mount for damping vehicle noise and vibration is opposed firstly, the structure of passive type and its mechanical model are described. The analysis of the experimental data show that the dynamic characteristics of MR mount such as dynamic stiffness and loss angles vary distinctly as the excitation frequency, and MR fluids as one type of attracting controllable fluids are fit for hydraulic engine mounts. The author advises to work out potentialities of MR fluids, the semi control or active control MR fluids filled hydraulic engine mount must be developed.展开更多
In the high-speed maglev system,accurate real-time information of the train position is essential forstable,safe and efficient train operation.To detect the relative position of the high-speed maglev trainfrom a refer...In the high-speed maglev system,accurate real-time information of the train position is essential forstable,safe and efficient train operation.To detect the relative position of the high-speed maglev trainfrom a reference position,a location method based on long stator slot detection was proposed.Besides,aprototype system has been successfully developed.The hardware structure of the system,as well as itsworking principle was described.Moreover,a subdivision algorithm for calculating the pole location anglesignal was elucidated.Experiments show that the proposed method is feasible.The technical indexes ofthe detection system satisfy the requirements of the vehicle operation control system.The relative positionsensing system can be put into practice.展开更多
The content of this subject research is to conduct optimization for engine mounting system, and through optimization, it can make the vibration between engine and vehicle body achieve a minimum, using Adams software f...The content of this subject research is to conduct optimization for engine mounting system, and through optimization, it can make the vibration between engine and vehicle body achieve a minimum, using Adams software for simulation. It studies the isolation vibration of the engine mounting system and conducts goal optimization for fixed frequency. This paper uses two methods for optimization. One is to use the rational allocation of fixed frequency to optimize the fixed frequency, and the other is to use energy decoupling method to optimize the fixed frequency. It uses Adams software for simulation of the optimized fixed frequency and conducts comparison of simulated results. The simulated results show that the optimized energy distribution situation almost achieves 90%. Compared with original data, decoupling degree also has a very great improvement, illustrating that the optimized data has greater effect for the isolated vibration of engine, in order to further verify the feasibility of optimization design method.展开更多
文摘Using magnetorheological (MR) fluids in hydraulic engine mount for damping vehicle noise and vibration is opposed firstly, the structure of passive type and its mechanical model are described. The analysis of the experimental data show that the dynamic characteristics of MR mount such as dynamic stiffness and loss angles vary distinctly as the excitation frequency, and MR fluids as one type of attracting controllable fluids are fit for hydraulic engine mounts. The author advises to work out potentialities of MR fluids, the semi control or active control MR fluids filled hydraulic engine mount must be developed.
基金the National High Technology Research and Development Program of China(No.2001AA505000,2004AA505240)
文摘In the high-speed maglev system,accurate real-time information of the train position is essential forstable,safe and efficient train operation.To detect the relative position of the high-speed maglev trainfrom a reference position,a location method based on long stator slot detection was proposed.Besides,aprototype system has been successfully developed.The hardware structure of the system,as well as itsworking principle was described.Moreover,a subdivision algorithm for calculating the pole location anglesignal was elucidated.Experiments show that the proposed method is feasible.The technical indexes ofthe detection system satisfy the requirements of the vehicle operation control system.The relative positionsensing system can be put into practice.
文摘The content of this subject research is to conduct optimization for engine mounting system, and through optimization, it can make the vibration between engine and vehicle body achieve a minimum, using Adams software for simulation. It studies the isolation vibration of the engine mounting system and conducts goal optimization for fixed frequency. This paper uses two methods for optimization. One is to use the rational allocation of fixed frequency to optimize the fixed frequency, and the other is to use energy decoupling method to optimize the fixed frequency. It uses Adams software for simulation of the optimized fixed frequency and conducts comparison of simulated results. The simulated results show that the optimized energy distribution situation almost achieves 90%. Compared with original data, decoupling degree also has a very great improvement, illustrating that the optimized data has greater effect for the isolated vibration of engine, in order to further verify the feasibility of optimization design method.
