Abstract
Springs are used for various purposes, particularly for vibration control and the removal of machines. However, the use of a spring generates high amplitude at the resonance point; therefore, it is difficult to eradicate vibration from all frequency bands. To solve this issue, the variable rate spring was developed, which is composed of a magnetic spring. This variable rate spring can change the spring constant. Basically, the natural frequency of the vibration system fluctuates with changes in the spring constant. As a result, the problem can effectively be resolved by changing the resonance point and eradicating the vibration. The variable rate spring is composed of a magnetic spring and a compression spring; the utility of this spring was verified by an experiment.