So from this discussion, it should be clear that the cantilever beam frequencies can only shift so far when a spring is considered at the tip of the beam.
那么综上所述，很显然，当在梁的顶部考虑一个弹簧时，悬臂梁的频率仅能迁移这么多。
2
The low-voltage driving circuit is adopted to drive a piezoelectric ceramic phase shifter to shift the phase of the reference beam, so as to make the instrument lighter, smaller and cheaper.
采用低压驱动电路驱动压电陶瓷相移器对参考光束进行相移，从而使仪器质量减轻、体积缩小、成本降低。
3
Moreover, we deduce the linear relationship between reflected wavelength shift of fiber grating and vertical displacement of cantilever beam which the fiber grating is sticked on.