寄生阻尼因数的确定对基于惯性耦合的谐振式振动能捕获微型发电机的模型求解、性能优化等至关重要。针对电磁式(electromagnetic,EM)振动能发电机,提出利用发电机空载时惯性质量块的阻尼自由衰减振荡过程,采用有限元分析(finite element...寄生阻尼因数的确定对基于惯性耦合的谐振式振动能捕获微型发电机的模型求解、性能优化等至关重要。针对电磁式(electromagnetic,EM)振动能发电机,提出利用发电机空载时惯性质量块的阻尼自由衰减振荡过程,采用有限元分析(finite element analysis,FEA)、模型数值求解来获得线圈空载电压的仿真值,将所得仿真值与实验测量结果比对,在最小均方误差(least mean square error,LMSE)准则下确定出寄生阻尼因数的新方法。结果表明,此方法是可行的,且与常规方法相比具有更好的普适性。展开更多
By introducing a fictitious mode to be a counterpart mode of the system mode under review we introduce the entangled state representation （η｜, which can arrange master equations of density operators p（t） in quant...By introducing a fictitious mode to be a counterpart mode of the system mode under review we introduce the entangled state representation （η｜, which can arrange master equations of density operators p（t） in quantum statistics as state-vector evolution equations due to the elegant properties of （η｜. In this way many master equations （respectively describing damping oscillator, laser, phase sensitive, and phase diffusion processes with different initial density operators） can be concisely solved. Specially, for a damping process characteristic of the decay constant k we find that the matrix element of p（t） at time t in 〈η｜ representation is proportional to that of the initial po in the decayed entangled state （ηe^-kt｜ representation, accompanying with a Gaussian damping factor. Thus we have a new insight about the nature of the dissipative process. We also set up the so-called thermo-entangled state representation of density operators, ρ = f（d^2η/π）（η｜ρ〉D（η）, which is different from all the previous known representations.展开更多
文摘寄生阻尼因数的确定对基于惯性耦合的谐振式振动能捕获微型发电机的模型求解、性能优化等至关重要。针对电磁式(electromagnetic,EM)振动能发电机,提出利用发电机空载时惯性质量块的阻尼自由衰减振荡过程,采用有限元分析(finite element analysis,FEA)、模型数值求解来获得线圈空载电压的仿真值,将所得仿真值与实验测量结果比对,在最小均方误差(least mean square error,LMSE)准则下确定出寄生阻尼因数的新方法。结果表明,此方法是可行的,且与常规方法相比具有更好的普适性。
基金supported by President Foundation of Chinese Academy of Sciences and National Natural Science Foundation of China under Grant Nos. 10775097 and 10874174
文摘By introducing a fictitious mode to be a counterpart mode of the system mode under review we introduce the entangled state representation （η｜, which can arrange master equations of density operators p（t） in quantum statistics as state-vector evolution equations due to the elegant properties of （η｜. In this way many master equations （respectively describing damping oscillator, laser, phase sensitive, and phase diffusion processes with different initial density operators） can be concisely solved. Specially, for a damping process characteristic of the decay constant k we find that the matrix element of p（t） at time t in 〈η｜ representation is proportional to that of the initial po in the decayed entangled state （ηe^-kt｜ representation, accompanying with a Gaussian damping factor. Thus we have a new insight about the nature of the dissipative process. We also set up the so-called thermo-entangled state representation of density operators, ρ = f（d^2η/π）（η｜ρ〉D（η）, which is different from all the previous known representations.
