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Adaptive control of track tension estimation using radial basis function neural network

Defence Technology（防务技术） 2021年第4期17卷 1423-1433页

作者： Ping-xin Wang Xiao-ting Rui Hai-long Yu Guo-ping Wang Dong-yang Chen Institute of Launch Dynamics Nanjing University of Science and TechnologyNanjing210094China College of Electrical Energy and Power EngineeringYangzhou UniversityYangzhou225000China

Track tension is a major factor influencing the reliability of a *** order to reduce the risk of track peel-off,it is necessary to keep track tension ***,it is difficult to measure the dynamic tension during off-road *** on the analysis of the relation and external forces depending on free body diagrams of the idler,idler arm,road wheel and road arm,a theoretical estimation model of track tension is *** estimation results with multibody dynamics simulation results,the rationality of track tension monitor is *** the aid of this monitor,a track tension control system is designed,which includes a self-tuning proportional-integral-derivative(PID)controller based on radial basis function neural network,an electro-hydraulic servo system and an idler *** tightness of track can be adjusted by turning the idler *** results of the vehicle starting process indicate that the controller can reach different expected tensions quickly and *** with a traditional PID controller,the proposed controller has a stronger anti-disturbance ability by amending control parameters online.

关键词： Track tension Monitor Multibody dynamics Neural network anti-disturbance ability

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Effect of disturbances on the Operation Process of a Methane-Fueled Free-Piston Engine Generator

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Journal of Thermal Science 2023年第2期32卷 881-896页

作者： HUANG Fujun XIAO Huihui GUO Shuman WANG Lijun YANG Zhenzhong KONG Wenjun School of Mechanics North China University of Water Resources and Electric PowerHenan 450045China Henan International Joint Laboratory of Thermo-Fluid Electro-Chemical System for New Energy Vehicle Henan 450045China School of Astronautics Beihang UniversityBeijing 102206China

In this paper,the effect of disturbances on the operation process of a methane-fueled free-piston engine generator(FPEG)was experimentally *** disturbance sources,namely step change of external load,mixture flow rate fluctuation,random misfire of a cylinder,and elastic collision,were identified and applied to the *** results showed that the FPEG successfully achieved a steady-state operation with *** maximum instantaneous electric power of 127 W and the average effective electric power of 38.9 W were *** an external load was instantaneously disconnected,the engine frequency increased from 26.7 Hz to 31.3 *** fluctuation amplitudes of induced voltage,pressure and compression ratio were 18.9%,24.7%and 52.2%respectively in the *** contrast,when the external load was instantaneously connected,the corresponding values were 42.2%,31.3%and 64.3%respectively,indicating that the instantaneous external load connection had a greater disturbance impact on the FPEG operation *** encountering the step change of external load,the FPEG can still restore stable operation and show good anti-disturbance *** with increasing mixture flow rate,reducing the mixture flow rate has a greater disturbance impact on the engine operation *** random misfire of a cylinder will cause remarkable fluctuations in piston displacement and cylinder pressure,the FPEG will not stop running,but continues to work as a single-piston *** collision event may adversely affect the stability of engine operation,but will not lead to the FPEG ***,serious collision event may lead to ignition failure and shutdown accident.

关键词： free-piston engine generator disturbance sources operation stability anti-disturbance ability

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