基于压力差的减摇鳍升力测量方法研究

摘要

Based on pressure difference of hydraulic cylinder, this paper presents a lift measurement method for the fin stabilizer for the purpose of lift feedback control The lift of fin can be calculated from the pressure difference of hydraulic cylinder according to the theorem of moment equilibrium. Then, the key problem in this method of lift measurement, I. E. , the estimation of the distance between center line of lift and fin shaft, was further studied. Since that results of theoretical arithmetic methods in dynamic conditions are too coarse, the experimental data and a general regression neural network (GRNN) are employed in calculating the center line of fin lift. Simulation results show that the method can get more accurate results in the calculation of the distance between center line of lift and fin shaft.%为了实现减摇鳍的升力反馈控制,提出了基于油缸压力差的减摇鳍升力测量方法.依据力矩平衡原理,利用驱鳍转动油缸的压力差,可以计算出减摇鳍上产生的实际升力.对该方法中的关键问题-升力中心线距鳍轴间的距离进行了深入研究.由于理论计算升力中心线距鳍轴间的距离在动态下误差较大,采用实验数据和广义回归神经网络对升力中心线距鳍轴同的距离进行确定.仿真结果显示,该方法可以很好地计算出升力中心线距鳍轴间的距离.