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- W2393419792 abstract "To solve the problems in existing 3D magnetic compasses(such as,error compensation is slow,special turntable is needed,and field applying is inconvenient),we put forward a method to establish a scalene ellipsoid surface mathematical model of the general magnetic field to compensate errors.First,we established the ellipsoid surface model according to the general magnetic field model presented by Poisson equation.Then,we linealized the ellipsoid surface equation using Newton iteration method,and used least square method and total least square method respectively to calculate linear equations,derive the mathematical forum of ellipsoid surface fitting and the ellipsoid surface parameters.Finally,we derived the calculation forum of parameters’ initial value by using least square method,and gave the method of selecting data point.The results show that the errors can be compensated only by using a hand to hold a magnetic compass and let it spin in all quadrants.And the heading measurement precision can reach 0.8°.The compensation precision of this method is almost the same as that of traditional turntable compensation methods,but it is more agile and fit for the field use with no turntable equipment." @default.
- W2393419792 created "2016-06-24" @default.
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- W2393419792 date "2012-01-01" @default.
- W2393419792 modified "2023-09-23" @default.
- W2393419792 title "Three-dimensional magnetic compass error compensation algorithm based on ellipsoid surface fitting" @default.
- W2393419792 hasPublicationYear "2012" @default.
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