定点转动的CAI教学

The Computer-Aided Teaching of Revolving Round a Fixed Point

刚体的定点转动教学是理论力学教学中的难点之一。该文介绍了用3DSMAX3设计制作有关定点转动的系列动画,包括定点转动的概念——倒立圆锥的定点转动和陀螺的定点转动,定点转动的分解——纯自转、纯进动和纯章动,定点转动的合成及空间极面与本体极面,以及教学过程中对动画的使用方法。引入计算机辅助教学,将定点转动制作成动画,使定点转动的教学过程形象化,提高了教学效果。

The teaching of rigid body fixed- point rotation is one of the difficulties in the teaching of Theory Mechanics. This paper introduces the design and use of 3DSMAX3 series of fixed- point rotation animations,including the notion of fixed point rotation-the fixed point rotation of inverted cone and the fixed point rotation of gyroscope,the decomposition of fixed point rotation- pure rotation,pure precession and pure nutation,the synthesis of fixed point rotation,polhode polar and herpolhode polar,as well as the use method of animation in the teaching process. The introduction of computer-aided teaching with the fixed point ratation made into animation,the teaching process is thus visual and teaching effect is improved.