| 1 | The system executes simple harmonic motion. | |
| 2 | According to the cycle formula of simple harmonic vibration, the cycle formula of simple pendulum could be figured out. | |
| 3 | Now, as long as I am in the linear portion of the curve, I can generate a simple harmonic motion. | |
| 4 | The frequency response functions of relative displacement and absolute acceleration are derived under acting of harmonic ground excitation. | |
| 5 | Aiming at the deficiency of simple harmonic motion in materials, author puts forward some measures to improve the experiment of simple harmonic motion. |