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一磁电式速度传感器的幅频和相频特性如图所示， 其中ω 0 为该传感器的固有角频率，ω为被测角频率，其阻尼比ξ为0.7。为了尽量减小测量时的幅值和相位误差，则(1)该传感器应工作在什么条件下?⑵f 0 =10Hz时，其工作最低频率f 0 的范围应为多少?
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