Some of them, such as time Rover (see Resources for the July 2002 column), use modal logic and other logical formalisms to express deep attributes of run-time behavior.
A test method of measuring rigid modal behavior of column rotor helicopter on landing gear is suggested in this paper.
本文基于模态分析理论和试验技术，提出了一套测定纵列式旋翼直升机在起落架上的刚体模态特性试验方法。
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The Single Input and Single Output(SISO)modal experiment and numerical simulation was used to study the dynamic behavior of a CFST column-H steel beam frame structure model.