Whereas it can only control vibration level, and cannot control vibration spectrum as conventional electro dynamic.
另外不足的是，它只能控制振动的量级，而不能像传统的电磁振动台一样实现振动频谱的可控。
2
An effective shock response spectrum (SRS) time-history waveform synthesis method was presented for simulating shock environment with electro-dynamic shakers.
为利用电动振动台进行模拟冲击环境试验，给出了一种时域冲击波形合成方法。
3
It seems to imply that magic affects the electro-magnetic spectrum in some way. Some serious energy is being dealt with.