Study on algorithm of angular velocity of GFSINS;

Study on Installation Errors of Accelerometer in GFSINS;

Research on the Calculative Method of Angular Velocity in GFSINS;

In the gyroscopefree strapdown inertial navigation system,the angularvelocity calculation precision is a key technical point.

This paper derives a new algorithm on attitude matrix renew in order to modifiey the real time capacity of gyroscopefree strapdown inertial navigation system,and compare it with ode 4 RungeKutta.

There are many strengths in the gyroscope-free strapdown inertial navigation system because it is gyroscopes- free; the angular velocity, however, is calculated from signals that are sent by accelerometers, and its calculation error is divergent in time.

A system which only use accelerometers as the inertial measurement unit is called gyroscope free strap-down inertial navigation system(GFSINS).

In the gyroscope-free strap-down inertial navigation system,with the background of high-speed projectile attitude measurement to study,a new twelve-accelerometer model is set up based on improving angular velocity calculation precision and reducing navigation error accumulated over time.

Aim at disadvantages that the integral algorithm can produce accumulation error and the extraction algorithm may bring sign estimation error and a mass of extraction calculation,a new method of angular velocity calculation based on the weighted average method is put forward in the GFSINS(gyro free strapdown inertial navigation system).

To solve the problem of precision limitation of angular velocity calculation of gyro free strapdown inertial navigation system(GFSINS),two new angular velocity solutions were put forward.