基于编码器的复摆设计与实验研究  

The Design and Experimental Research of Compound Pendulum Based on Encoder

作　　者：张凯[1] 姚宇峰[1] 刘紫[1] 张智鹏[1] 

机构地区：[1]北京林业大学,北京100083

出　　处：《大学物理实验》2014年第5期23-26,共4页Physical Experiment of College

基　　金：北京林业大学"2013年北京市大学生物理实验竞赛项目"

摘　　要：针对复摆实验,设计了一种基于编码器的复摆实验装置。该装置将摆锤和多孔摆结合起来,可以采用多种方式对重力加速度、转动惯量进行求解,并验证了刚体的平行轴定理。在实验过程中,采用Matlab进行最小二乘法线性拟合,创新性地完成了对重力加速度的求解和平行轴定理的验证。实验结果表明,相比于传统的复摆,该装置更为简便,精度更高。Aimed at the experiment of compound pendulum,a experiment equipment of compound pendulum based on encoder is designed. The equipment combines pendulum bob with multihole pendulum. The gravity acceleration and inertia moment can be solved in various ways. The parallel-axis theorem of rigid body can be verified with this physical pendulum. In the process of experiment,linear least-squares fitting with Matlab is used to solve the gravity acceleration and verifies the parallel-axis theorem creatively. The results confirm that it is more simple and more accurate than the traditional compound pendulum.

关 键 词：复摆 编码器 重力加速度 转动惯量 平行轴定理 MATLAB 

分 类 号：O313.3[理学—一般力学与力学基础]