Vehicle-mounted integrated navigation method of resisting to failure of global positioning system
An integrated navigation and gyroscope technology, applied in the field of anti-GPS failure vehicle integrated navigation, can solve the problems of deteriorating calculation accuracy and achieve the effects of improving usability, reducing data dispersion, and improving estimation accuracy
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[0016] Such as figure 1 Shown, concrete method of the present invention is as follows:
[0017] (1) Estimate the gyro bias error by using static data: establish a state equation with the gyro bias error as the state variable, use the latest stop state data, and use weighted filtering technology to estimate the gyro bias error in real time.
[0018] When the velocity v=0, let the gyroscope measure the heading angular velocity sequence ω(i) to carry out the shift assignment,
[0019] ω(1)=ω(2)
[0020] ω(2)=ω(3)
[0021] ω(3)=ω(4), where ω is the latest measured value of the gyroscope.
[0022] …
[0023] ω(n-1)=ω(n)
[0024] ω(n)=ω
[0025] After weighted filtering, the gyroscope zero bias error b is obtained.
[0026] b = Σ j = 1 n j Σ i = 1...
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