摘要
从正弦激励下线性二阶系统的微分方程出发,结合阻尼振子的受迫振动以及RLC串联、并联谐振电路等具体物理情境,剖析了品质因数Q在频率特性、能量转换以及系统各物理参数等多个层次上的内涵,进而探讨如何更好地为工科各专业学生讲授品质因数这一概念.
Muhiple connotations of the quality factor Q associated with frequency characteristic, energy conversion, and various physical variables are analyzed. The analysis is based on the differential equation of second-order system with sinusoidal excitation, as well as the physical contexts of forced damping vibration and RLC serial/parallel resonant circuits. Then it is also discussed that how to teach the concept of quality factor Q better for engineering students.
出处
《大学物理》
北大核心
2017年第5期11-14,18,共5页
College Physics
基金
广西高等教育创优计划项目(优质本科专业)资助
关键词
品质因数
受迫振动
谐振电路
quality factor
damping vibration
resonant circuit
