Method for estimating sweep frequency voltage of airplane structure modal coupling test
A modal coupling, aircraft structure technology, applied in the testing of machine/structural components, aircraft component testing, vibration testing, etc., can solve the problems of affecting the test results, structural damage, overload of the control surface, etc., to achieve simple input data, The method is convenient and easy to implement
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[0020] The present invention will be described in further detail below. see figure 1 and figure 2 , a method for estimating the frequency sweep voltage of an aircraft structural modal coupling test, the aircraft control surface parameters are known, and the parameters include the natural frequency f of the control surface rotational mode n and modal damping ξ n , the control surface servo cut-off frequency f c , the control surface characteristic length c, the maximum overload n that the control surface structure can withstand max , the control surface safety factor s, the relationship K between the known frequency sweep voltage U and the control surface rotation angle θ, and the known test frequency sweep range [f 0 , f max ], estimate the frequency sweep voltage U; the present invention provides a theoretical basis for the frequency sweep voltage estimation of the structural modal coupling test, and provides support for the development of the test; where f n , f c , ...
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