Modeling and simulation of transfer alignment for distributed POS

To improve the precision of slave POS(position and orientation system) in distributed POS and compensate for the wing's flexure deformation of aircraft, a novel transfer alignment method was proposed. The ground-demo of the distributed POS was set up to test the proposed method. A mechanical method with the aid of the ANSYS software was used to establish the motion equation of the model wing. Then the flexure angle and its angular rate were added to the state variables of the Kalman filter. Based on this, the attitude error measurement equation was deduced with considering the flexure. The Kalman filter using the "velocity+attitude" matching algorithm was designed. The simulation results show that the precisions of horizontal angle and azimuth angle are superior to and respectively by the proposed method. All these characteristics show that the scheme is feasible and can provide references for the engineering application of the distributed POS.