一、前言在学习振动课程时,为了便于学生了解和掌握在同一方向上的两个简谐振动的合成以及在互相垂直方向上的两个简谐振动的合成,我们利用旋转矢量在轴上的投影能表示简谐振动的方法,设计制造了简谐振动合成仪,它能用慢动作逐渐地绘制出教科书上所列出的各种简谐振动合成的图形,描绘过程直观,有起点,有描绘方向,可达到直观教学的目的。通过课堂演示或学生亲自操作,能清楚地认识到位相和位 I. INTRODUCTION When learning vibration courses, in order to facilitate students to understand and master the synthesis of two simple harmonic vibrations in the same direction and the synthesis of two simple harmonic vibrations in mutually perpendicular directions, we use the rotation vector on the axis. The projection method can represent the method of simple harmonic vibration. The simple harmonic vibration synthesizer is designed and manufactured. It can gradually draw the various harmonic vibration synthesis patterns listed in textbooks in slow motion. The drawing process is intuitive and has a starting point. The direction of drawing can achieve the purpose of intuitive teaching. Students can clearly recognize the phase and position through classroom demonstrations or student hands-on