多普勒计程仪测流速精度考核试验研究

针对现有的计程仪对水测速精度考核方法抗外界干扰能力差的问题,文章提出了一种可减小风速风向和洋流影响的多普勒计程仪测流速精度考核新方法,该方法的核心思想在于“顺-逆”和“逆-顺”2个航程的计程仪速度平均矢量值与GPS速度矢量平均值相等.通过公式推导,给出了该方法抗洋流流速流向、风速风向等外界因素干扰的特性原理,并通过测流速误差分析计算,得到该方法相对于合速度标量消流法的高精度特性.最后,通过海上试验结果,验证了该方法的精确性和有效性.

The experimental analysis research on speed-precision measurement relative to current for acoustic Doppler log

Aiming at the problem of influence of wind and ocean current on speed-precision measurement relative to current for ADL,the paper proposed a new method which can eliminate the influence of wind and ocean current.The core concept lies in the vector average velocities of ADL being equal to the GPS vector average velocities.By formula derivation and deviation analyzing,the paper demonstrated the principle of its resistance against external interference and disturbances which contain current and wind,and proved that this method had a better velocity accuracy than scalar velocity dissipation method.Finally,the experimental results proved the high accuracy and availability of the proposed method.