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Wang F.-S.,Anhui Communications Vocational and Technical college
Chang'an Daxue Xuebao (Ziran Kexue Ban)/Journal of Chang'an University (Natural Science Edition) | Year: 2011

In order to forecasting the embankment settlement accurately, based on the consolidation theory of soil, the additional stress factor is introduced to improve the traditional delamination summation-method of the total embankment settlement, and the improved calculation theory and formula are put forward. A new calculation and prediction model is built based on the improved delamination summation-method and practical survey. The calculation program Settlement_Calculation for the calculation and prediction of embankment settlement is wrote based on the improved delamination summation-method and practical survey data. The survey and theory calculation for the test section of a secondary road in Anhui province is carried out adopting the calculation method and program. The results show that the error of the prediction value compared to the one of survey is less than 2.0%. Source


Lou Z.,Anhui Communications Vocational and Technical college
Applied Mechanics and Materials | Year: 2012

This paper introduces a digital signal processor based system design, through the computer acquisition individuals EMG(Electromyographic)signal data to monitor the dynamic activity of muscles, and the estimation of normal and pathological conditions of the acquired data of the power spectrum. In the collection system, the input signal of the two differential amplifier signal preprocessing and obtain the EMG signal linear feature. Obtain electromyographic signal is then digitized, and transmitted to the computer analysis. The optimization system for detection and Analysis on the clinical diagnosis of human functional status and rehabilitation has important significance. © (2012) Trans Tech Publications. Source


Yang L.,Hefei University of Technology | Yang L.,Anhui Communications Vocational and Technical college | Chen W.,Hefei University of Technology | Wang H.,Hefei University of Technology
Zhongguo Jixie Gongcheng/China Mechanical Engineering | Year: 2012

To improve hydraulic vehicle active suspension system control performance, the hydraulic actuators and the car vertical acceleration sensor fault diagnoses and isolation method were put forward. The half-vehicle four degree-of-freedom hydraulic active suspension system dynamical model was firstly built, considering ordinary fault of hydraulic actuator and sensor, the suspension fault models were then built. A fault detection filter was designed by pole placement, and the actuators' deadlocking and gain faults, the sensors' gain fault were diagnosed through the residual error information. To fix the fault place accurately, the faults were isolated by the correlation coefficients and fault vector length values. Finally, under the MATLAB/Simulink environment, the considerable simulations were carried out to the fault suspension systems. The results show that the actuators or the sensors faults can be diagnosed sensitively when the residual error fluctuation exceeds a threshold; the vehicle hydraulic active suspension actuators' faults can be isolated accurately by the maximal correlation coefficient, and the car vertical acceleration sensor fault can be isolated accurately by the maximal correlation coefficient and the minimal fault vector length value. Source


Yang L.,Hefei University of Technology | Yang L.,Anhui Communications Vocational and Technical college | Chen W.,Hefei University of Technology | Wang H.,Hefei University of Technology
Zhongguo Jixie Gongcheng/China Mechanical Engineering | Year: 2012

To improve control reliability and performance of a vehicle active suspension system, an optimal robust fault tolerant control method was put forward based on H2/H∞ control for active suspension system with suspension parameter disturbance and actuator fault. The fault suspension models were built considering the ordinary actuator faults and parameter disturbance for suspension's stiffness disturbance and damping coefficient disturbance. Based on the multi-objective H2/H∞ state-feedback control approach and by bounded real cited theorem, the design condition of the optimal robust fault tolerant control for the suspension models was derived. By linear matrix inequality toolbox, an optimal robust fault tolerant controller under out-line state was designed for fault closed-loop system. Finally under the MATLAB/Simulink environment, the considerable simulations were carried out. The results show that proposed controller can improve the ride comfort performance of vehicle active suspension and of fault suspension too. Furthermore, control performance of the optimal robust fault tolerant controller is superior to the controller designed under the state of perfect suspension without faults. Source


Zhong L.-S.,East China Jiaotong University | Yan Z.,Anhui Communications Vocational and Technical college | Yang H.,East China Jiaotong University | Qi Y.-P.,East China Jiaotong University | And 2 more authors.
Tiedao Xuebao/Journal of the China Railway Society | Year: 2013

Along with raising of train speeds, dynamic interaction between train and catenary, track and air intensifies, which sets high requirements for modeling and control of high-speed trains. In this paper, the predictive controller, based on data driven subspace approach, was designed for high-speed trains. The high-speed train multivariate dynamic system was established on the basis of the state space model. The high-speed train predictive subspace model was designed from input and output data. The method of designing the predictive controller was analyzed in detail and the predictive control algorithm was given. Through numerical simulation of high-speed trains, the effectiveness of the proposed control method is proved. Source

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