高频连续冲击载荷作用下单自由度系统的平衡及控制  

Balance and control of SDOF system under high-frequency continuous impact load

作　　者：朱金杰 王炅[1] Zhu Jinjie;Wang Jiong(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《南京理工大学学报》2020年第5期511-516,共6页Journal of Nanjing University of Science and Technology

基　　金：中央高校基本科研业务费专项资金(30920021112)。

摘　　要：针对航炮反后坐问题主要考虑被动缓冲,该文主动寻找航炮射击过程中的高频冲击平衡位置,并提出一种解决方案。考虑简化情形的无阻尼和欠阻尼单自由度系统,研究了系统受到高频连续冲击载荷作用下的平衡状态,保证系统在每次冲击前的状态一致。通过理论分析、四阶龙格库塔法数值计算以及提出的刚度负反馈控制策略,分别计算系统在平衡状态所需的初始条件以及平衡状态的速度和位移。数值验证理论分析结果的正确性,保证平衡状态的鲁棒性。研究结果对于实际受到高频连续冲击的系统具有一定的参考价值。Passive buffer is the main focus of the anti-recoil problem of aerial guns.In this paper,we try to find the high frequency shock balance position in the process of aerial gun firing and propose a solution.Considering the simplified case of undamped and under-damped single degree of freedom system,the balance state of the system under the action of high frequency continuous impact load is studied to ensure that the system state is consistent before each impact.Through theoretical analysis,numerical calculation via the fourth-order Runge-Kutta method and the proposed stiffness negative feedback control strategy,the initial conditions required by the system in the equilibrium state and the velocity and displacement of the equilibrium state are calculated.The theoretical results are validated by numerical simulations,and the robustness is guaranteed,respectively.The research results may provide some references to the actual high-frequency continuous impact system.

关 键 词：航炮 反后坐 被动缓冲 连续冲击 高频 载荷 单自由度系统 平衡 负反馈控制 

分 类 号：O325[理学—一般力学与力学基础] TB535[理学—力学]