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Xu Y.-Z.,Shandong Provincial Key Laboratory of Ocean Environment Monitoring Technology | Xu Y.-Z.,Shandong Academy of Sciences | Xu Y.-Z.,Nanjing Southeast University | Cao Y.-P.,Nanjing Southeast University | Zhong R.,Nanjing Southeast University
Dianji yu Kongzhi Xuebao/Electric Machines and Control | Year: 2015

A nonlinear multi-input multi-output (MIMO) model based on least squares support vector machine (LSSVM) was built according to the measured prototype characteristics, aiming at the problem of accumulated errors with multi-variable output of nonlinear switched reluctance motor (SRM) model. An improvement in structure was conducted compared with the traditional LSSVM modeling of SRM, and the inputs of LSSVM are angle and flux, and, outputs are current, torque and flux partial derivatives of the angle, what's more, this multi-output LSSVM avoids the accumulated errors caused by the previous combination of multi single-output LSSVM. The simulation of LSSVM model was complemented in Simulink using S function. It has been shown by experiments that the current waveform obtained by simulation is consistent with the experimental current waveform. When the peak current is 42A, peak angle is 6.36° and turn-off current is 29A in experiment, the corresponding simulation results are 43.5A, 6.58° and 29A, which verify the correctness and effectiveness of the proposed modeling method. ©, 2015, Editorial Department of Electric Machines and Control. All right reserved. Source


Yuan J.,Shandong Provincial Key Laboratory of Ocean Environment Monitoring Technology | Yuan J.,Shandong Academy of Sciences
Applied Mechanics and Materials | Year: 2014

The hydroacoustic transponder based on the principle of laser interferometry is investigated, which consists of three parts: 1) the front-end module, which is a signal receiving and pre-processing module, and consists of a laser interferometric receiver and a filter group; 2) the signal processing module, which consists of the data acquisition module and a data processing system; 3) the back-pulse module, which consists of an automatic gain adjustment module, a transmitter module and a back-transducer. We give the detailed designing flow charts of the hardware and software programs. © (2014) Trans Tech Publications, Switzerland. Source


Yu B.L.,Shandong Provincial Key Laboratory of Ocean Environment Monitoring Technology | Yu B.L.,Shandong Academy of Sciences | Li J.,Nanjing Southeast University | Li W.Y.,Nanjing Southeast University
Applied Mechanics and Materials | Year: 2014

A novel low-noise amplifier (LNA) suitable for COMPASS receiver applications is designed in SiGe-BiCMOS technology. Inductively degenerated technique and resistive feedback technique are employed to reduce the noise figure. With 1.8V power supply, the measured results achieve 17.23dB power gain and 2.58dB noise figure at 1.561GHz. © (2014) Trans Tech Publications, Switzerland. Source


Yu B.L.,Shandong Provincial Key Laboratory of Ocean Environment Monitoring Technology | Yu B.L.,Shandong Academy of Sciences | Chen J.,Nanjing Southeast University | Li W.Y.,Nanjing Southeast University
Advanced Materials Research | Year: 2013

A monolithically integrated 10Gbps Vertical Cavity Surface Emitting Laser (VCSEL) current driver is implemented in SMIC 0.18μm RF CMOS technology. High current driving capability as well as agile switching speed is achieved by shunt peaking technique and cascade structure. Test result shows that the driver can drive the common anode VCSEL well working at 10Gbps, and delivers 9.7mA modulation current. With single 1.8V power supply, the core power consumption is 22.5mW and the die size is 800μm×500μm. © (2013) Trans Tech Publications, Switzerland. Source


Mu H.,Center for Monitoring Research | Mu H.,Shandong Provincial Key Laboratory of Ocean Environment Monitoring Technology | Mu H.,Shandong Academy of Sciences | Yuan J.,Center for Monitoring Research | And 2 more authors.
Applied Mechanics and Materials | Year: 2014

The optimal control of autonomous profiling monitoring underwater vehicle(APMUV) is investigated. Firstly, dynamics equations in vertical plane with disturbances are constructed, and the equations are converted into a linear system by feedback linearization method and then feedforward and feedback optimal control (FFOC) law is designed for the linear system. To solve the unpractical problem of the control law, we construct a disturbance observer to observe the system states to make a quick convergance of the observed system states. Numerical simulations show the effectiveness of the control scheme. © (2014) Trans Tech Publications, Switzerland. Source

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