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
This paper highlights the available numerical computation techniques in mechanical engineering field with focus on application of modeling and simulation within renewable energy conversion machines as a particular res...This paper highlights the available numerical computation techniques in mechanical engineering field with focus on application of modeling and simulation within renewable energy conversion machines as a particular research case. The study makes special focus on simulation approaches based on finite elements and multibody dynamics that are currently focused within the research community. Developing the simulation model in a computer-aided design （CAD） tool is a precondition for a successful simulation-based mechanical system research. The article discusses and elaborates the methods imple- mented to integrate design data with other computer-aided engineering functions. The motivation is the fact that simulation-based research is useful for design optimization of mechanical systems that operate in harsh and unfriendly environment where conducting physical testing of proto- types is difficult. In addition, the manufacturing environ- ment is benefiting from the developments in numerical computation techniques through machining simulation that significantly reduce the time-to-market and thus increase competitiveness. The study is also intended to explore the existing gaps of capabilities in current approaches in application of computational techniques in order to draw at- tention to future challenges and trends.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。
文摘This paper highlights the available numerical computation techniques in mechanical engineering field with focus on application of modeling and simulation within renewable energy conversion machines as a particular research case. The study makes special focus on simulation approaches based on finite elements and multibody dynamics that are currently focused within the research community. Developing the simulation model in a computer-aided design （CAD） tool is a precondition for a successful simulation-based mechanical system research. The article discusses and elaborates the methods imple- mented to integrate design data with other computer-aided engineering functions. The motivation is the fact that simulation-based research is useful for design optimization of mechanical systems that operate in harsh and unfriendly environment where conducting physical testing of proto- types is difficult. In addition, the manufacturing environ- ment is benefiting from the developments in numerical computation techniques through machining simulation that significantly reduce the time-to-market and thus increase competitiveness. The study is also intended to explore the existing gaps of capabilities in current approaches in application of computational techniques in order to draw at- tention to future challenges and trends.
