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Liu L.,Xian Jiaotong University | Ding W.,Xian Jiaotong University | Liu C.,Xian Jiaotong University | Ji H.,Yongji Xinshisu Electrical Equipment Co. | Cao C.,National University of Singapore
Nonlinear Dynamics | Year: 2014

This paper considers the design of adaptive sliding mode control approach for synchronization of a class of fractional-order arbitrary dimensional hyperchaotic systems with unknown bounded disturbances. This approach is based on the principle of sliding mode control and adaptive compensation term for solving the problem of synchronization of the unknown parameters in fractional-order nonlinear systems. In particular, a novel fractional-order five dimensional hyperchaotic system has been introduced as a representative example. Furthermore, global stability and asymptotic synchronization between the outputs of master and slave systems can be achieved based on the modified Lyapunov functional and fractional stability condition. Simulation results are provided in detail to illustrate the performance of the proposed approach. © 2014 Springer Science+Business Media Dordrecht. Source

Sun G.-Q.,China Jiliang University | Niu Z.-J.,Yongji Xinshisu Electrical Equipment Co. | Cai H.,China Jiliang University | Wang B.-R.,China Jiliang University
Jiliang Xuebao/Acta Metrologica Sinica | Year: 2015

A method based on multi-objective evolutionary algorithms (MOEAs) for real-time and in-situ efficiency determination of induction motor is introduced. The multi-objective algorithm is optimized, and it introduces a low-intrusive level method based on non-dominated sorting genetic algorithm-II (NSGA-II) and strengths Pareto evolutionary algorithm 2 (SPEA2) for efficiency estimation of the induction motor. Therefore, the equivalent circuit method, and the segregated losses method combine with MOEAs. Through the practice of a 5.5 kW motor, it shows that, the method on the estimation of induction motor efficiency is effective, and in the normal range of the load, the estimating value and the actual value of test error is less than 3%. And compared to each other, it is found that NSGA-II results are slightly superior to that of the SPEA2. ©, 2015, Chinese Society for Measurement. All right reserved. Source

Mu D.-S.,Tongji University | Liu G.,Tongji University | Song D.-C.,Tongji University | Zhao C.-X.,Yongji Xinshisu Electrical Equipment Co.
Applied Mechanics and Materials | Year: 2012

A new 3D crankshaft model and a re-manufacturing one were built respectively together with piston, link and etc., According to the static structural module and the fatigue module embedded in ANSYS workbench, their stress distribution charts and fatigue life charts were obtained. By comparison, it can prove that fatigue life of the re-manufacturing crankshaft is very close to new one. © (2012) Trans Tech Publications, Switzerland. Source

Sun G.-Q.,China Jiliang University | Cai H.,China Jiliang University | Niu Z.-J.,Yongji Xinshisu Electrical Equipment Co. | Wang B.-R.,China Jiliang University
Dianji yu Kongzhi Xuebao/Electric Machines and Control | Year: 2014

Based on the typical pulse width modulation (PWM) modulation of brushless DC motor (BLDCM), a new PWM switch mode was presented, and to confirm that it can eliminate diode freewheeling of non commutation zone and non conduction phase winding, thereby greatly reducing non commutation torque pulsation. In the commutation torque ripple suppression of BLDCM system, through current analysis of rising and falling of opening phase and closing phase in commutation zone, a ZETA converter in main circuit of inverter was put forward. The ZETA converter eliminates commutation torque ripple based on fixed relationship between DC power supply voltage and the motor back electromotive force (EMF). When BLDCM enter the commutation zone, the ZETA converter supply power to the inverter and power supply voltage to maintain four times in the back EMF. The experimental confirmed that non commutation zone and the commutation torque ripple of BLDCM drive system have been improved. ©, 2014, Editorial Department of Electric Machines and Control. All right reserved. Source

Li L.,Tianjin Polytechnic University | Yanmin L.,Yongji Xinshisu Electrical Equipment Co.
2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011 | Year: 2011

With the development of the logistics, it's necessary to require us to reform the logistics system from an environmental point of view, thus forming an symbiotic type of logistics management system and transforming the one-way relationship between economic development and logistics and between consumption cycle and logistics. In order to prevent logistics from causing damage to the environment, it's absolutely essential to form a modern logistics system that can enhance the healthy development of economy and consumption cycle, namely transformation into green logistics. © 2011 IEEE. Source

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