具有自动误差补偿功能的智能磁航向系统

研制了一种具有三种误差补偿方法的智能磁航向系统(智能电子磁罗盘)。传统的给定基准法具有满意的补偿效果,但试验复杂。对水平情况,椭圆假设法把误差的形成过程假设为从圆到椭圆的变化过程;而对任意姿态的情况,椭球面假设则把该过程假设为从圆球面到椭球面的变化过程。其逆过程就是误差补偿过程。后两种方法试验非常方便,不需要高准确度的设备。试验结果表明,这两种方法可实现自动误差补偿和自动校准,补偿效果满意,成本低。还设计了一个包含上述三种方法的虚拟仪表用于计算误差补偿系数。用EEPROM永久保存这些系数,消除了类似电位计的可动部件。该系统体积小、成本低、可靠性高,可用于小型飞机、车辆、船舰等运载工具。

Intelligent magnetic heading system with automatic error compensation function

?An intelligent magnetic heading system (IMHS),or an intelligent magnetic compass,is developed.The IMHS contains three error compensation methods.Traditional method,which needs precise attitude,indicate satisfy compensation result,but the experiment is complex.Ellipse hypothesis method supposes the formation of errors as a change process from a circle to an ellipse if it is in the horizontal plan,and ellipsoid hypothesis from a sphere to an ellipsoid if it is in arbitrary attitudes.The reverse process is just the compensation process.Experiment of the last two methods is very convenient and no precise equipment is needed.Experiment shows that the automatic compensation and auto calibration of the two methods can be realized easily with satisfy compensation result and low cost.A virtual instrument,which can perform all the three algorithms,is also developed to help the IMHS to calculate compensation coefficients.An EEPROM is designed to store the coefficients,so that no movable components,such as potentiometers,are needed.The IMHS are small in size,low cost and high reliability.It can be used in small aircrafts, cars, ships and other land vehicles.