Research On Arresting Cable And Cable Force Identification Under Arresting Condition

When landing on the carrier,the aircraft,with high landing speeds,limited running distances,and harsh landing conditions,imposes severe requirements on the arresting mechanism.As an important component that directly participates in the arresting process,the arresting cable bears a huge load.Therefore,the importance of arresting cable and its safety is self-evident.At present,with the development of the aircraft carrier industry,research on carrier-based aircraft and arresting mechanisms is gradually underway.However,research specifically on arresting cables is still in its infancy.The main content of this article is to carry out a series of researches on arresting cables under arresting conditions.Based on the idea of multi-body dynamics,this paper discusses the modeling method of large-flexibility complex cables.Two kinds of cable models are established using the software Adams,one using a full-scale discrete element method and the other using composite structure model.Through different degrees of simplification,the establishment of two-dimensional and three-dimensional arresting simulation models are described respectively.A method for identifying the cable force based on the acceleration of the carrier-based aircraft is proposed.The indirect measurement of the cable force is achieved by establishing the dynamic relationship between the aircraft and the arresting cable.Optimizations are put forward by considering the bending effects of the cable.Based on the simulation examples of 2D and 3D working conditions,the analysis and verification of the acceleration-based cable force identification method is performed.In addition,starting from the characteristics of the arresting cable,a frequency method based on the lateral vibration acceleration of the arresting cable is proposed referring to the traditional method of identifying the cable tension of the bridge.Hilbert-Huang transformation is used to extract the instantaneous frequency information in the lateral vibration acceleration signals.It enables the identification of the cable force with highly nonlinear and time-varying characteristics.The simulations are carried out to verify the universality of the method,using models with fixed cable force and fixed length,with time-varying cable force and fixed length,and with time-varying length conditions respectively.The method was applied to the identification of cable force under 3D arresting conditions.The work of this paper takes the identification method of arresting cables as the core,combined with the modeling and simulation analysis of arresting cables and arresting systems,it has achieved a deeper grasp of the characteristics of arresting cables under arresting process.