基于遥测力学环境参数的飞行器横向响应载荷辨识方法OA

Given the big error between the theoretical dynamic model and the actual situation caused by the complexity of the underwater mechanical environment of the submarine-launched aircraft,this paper proposes an identification method for lateral response loads of aircraft during water egress based on telemetry mechanical environment parameters.Based on the theory of structural mechanics,this method,first,identified the modal parameters of the telemetered mechanical environment parameters of the water-egress phase of the aircraft by combining the natural environment excitation technique with the eigensystem realization algorithm.Then,the vibration response of the key section was decomposed adaptively by the variational mode decomposition method to obtain the low-order modal response components,Finally,according to the principle of modal superposition and modal orthogonality theory,the modal coordinates were obtained by using the identified modal parameters and the low-order modal components.Also,the lateral response load was identified through the combination of the modal shear force and the modal bending moment.The actual measurement example verified the validity of the method.