Simple harmonic motion synthesis demonstration instrument

The invention relates to a simple harmonic motion synthesis demonstration instrument. The demonstration instrument comprises a signal generator used for generating two sine wave signals; the two control modules are respectively used for receiving the two sine wave signals; the two galvanometer motor modules are each provided with a motor and a galvanometer, and the two control modules control the two motors to vibrate according to the received sine wave signals so as to drive the two galvanometers to vibrate; the imaging generation device comprises a laser pen and an imaging plane; laser is emitted to the first galvanometer through the laser pen, the first galvanometer reflects the received laser to the second galvanometer, and the second galvanometer reflects the received laser again to the imaging plane; the simple harmonic motion synthesis is realized through the two galvanometers in the vibration process, and a laser diagram generated by the simple harmonic motion is displayed on an imaging plane through