基于角速率匹配法的船体变形实船测量技术研究

Actual ship measurement technology research of ship deformation based on angular matching method

针对船体变形测量技术大多处于理论仿真的局限性,提出了基于实船试验的船体变形测量技术,考虑到测量速度的需要及静态变形角缓慢变化的特征,推导了基于角速率匹配法"准静态"模型。采用Kalman滤波技术对Mochalov模型和"准静态"模型下的变形角进行了估计,从实船试验的角度验证了船体变形的产生原因,拓展了"准静态"模型适用范围,进一步分析了舵操作对船体变形角的影响。试验结果表明,"准静态"变形角对缓变静态变形角跟踪效果良好,提高了静态变形角的测量精度,为光纤陀螺船体变形测量技术的实际应用奠定了坚实的基础。

In order to solve the limitation of ship deformation measurement technologies on the basis of theory simulation phases, a measurement technology based on actual ship test was proposed. Considering the measurement speed and the slowly varying feature of static deforming angle, ‘quasi-static＇ model was put forward. Kalman filter was used to estimate the ship＇s deforming angles based on the model proposed by Mochalov and ‘quasi-static＇ model respectively, and hence the reasons of ship deformation were validated from the actual ship experiments. The applicable scope was expanded, and the influence of rudder operation on ship＇s deformation angles was further analyzed. The experiment results indicated that the ‘quasistatic＇ deforming angle can track the adagio process of static deforming angle well, thus further improving the measurement accuracy of ‘quasi-static＇ deforming angle and laid a solid foundation for the actual application of optical fiber gyro in ship deformation measurement technology.