滑跑无人机起降过程动力学特性分析及性能底数评估

Analysis of the Dynamic Characteristics of the Takeoff and Landing Process of Taxi-Running Uav and Evaluation of the Performance Base

在备战打仗大环境下,为了给装备试验考核提供技术参考,针对滑跑起降无人机起降阶段机身-起落架-地面之间复杂的动态特性,本文建立了飞机-起落架-跑道的系统动力学仿真模型及动力学方程,分别采用多尺度法和有限元分析法研究了其在不同气动载荷、重力以及作动筒载荷耦合作用下的系统动力学特性,并对可靠性和安全性进行了仿真分析.结果表明,不同降落速度对起落架-地面系统的动力学行为有较大的影响;起落架系统强度、刚度和安全特性满足相关指标.通过滑跑起降无人机动态安全特性以及在飞行作战中的极限疲劳寿命分析,为后续武器装备的考核以及性能底数评估提供了技术参考.

In order to provide technical reference for equipment test and assessment in the context of war preparation,in view of the complex dynamic characteristics between the fuselage-landing gear-ground of the taxiing takeoff and landing UAV during the takeoff and landing phase,this paper establishes the system dynamics simulation model and dynamic process of the aircraft-landing gear-runway,and uses the multi-scale method and the finite element analysis method to study its different aerodynamic loads The dynamic characteristics of the system under the coupling of gravity and actuator load,and the reliability and safety are simulated and analyzed.The results show that different landing speeds have great influence on the dynamic behavior of the landing gear-ground system;The strength,stiffness and safety characteristics of the landing gear system meet relevant indicators.Through the analysis of the dynamic safety characteristics of the taxiing takeoff and landing UAV and the ultimate fatigue life in flight operations,it provides a technical reference for the subsequent assessment of weapons and equipment and the evaluation of performance base.