本文从理论和实验两个方面探究了二自由度系统的振动，在考虑摩擦力和空气阻力的影响后给出了运动方程. 使用3个弹簧和两个位置传感器搭建了实验装置，利用PASCO系统进行了实验，并比照数值模拟结果，得出了本系统两传感器滑块所受的摩擦力分别为0.003 075 N和0.003 225 N，空气阻力系数C为1.0，并验证了所研究系统建模的准确性. 本实验结果对多自由度系统的振动问题的研究有一定参考价值.

In this paper the vibration of two-degree freedom system was explored in theoretic and experimental way, and a set of motion equations was given by considering the influence of friction and air resistance. Three springs and two position sensors were used to build an experimental device. The PASCO system was used for experiments which were compared with the numerical simulation results. The friction forces of the two sensor sliders in this system were obtained as 0.003 075 N and 0.003 225 N, and the air resistance coefficient was C=1.0. The accuracy of the modelling of the studied system was also verified. The experimental results have a certain reference value for the study of vibration problem of two-degree freedom system.