二阶系统的传递函数为G(s)=3/(4s2+s+100),其无阻尼固有频率ωn是()。_机械工程_全学科试题题库

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二阶系统的传递函数为G(s)=3/(4s2+s+100),其无阻尼固有频率ωn是()。
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