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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2017, Vol. 38 ›› Issue (10): 320841-320841.doi: 10.7527/S1000-6893.2016.320841

• Electronics and Electrical Engineering and Control • Previous Articles     Next Articles

Size parameters identification and rotation project design for single-axis rotary SINS

GUO Qi, ZHOU Zhaofa, SUN Lijiang, XU Zihao, CHEN He   

  1. Laboratory of Positioning, Orientation and Electro-optical Collimation, The Rocket Force University of Engineering, Xi'an 710025, China
  • Received:2016-10-11 Revised:2016-12-12 Online:2017-10-15 Published:2016-12-12
  • Supported by:

    National Natural Science Foundation of China(41174162)

Abstract:

To calculate size effect parameters of single-axis rotary Strapdown Inertial Navigation System (SINS),relevant expression is derived and rotation project is designed.The principle of size effect for the system is analyzed,and the method utilizing acceleration measurement as observables for calculating the size effect parameters is proposed.The body attitude in the expression for size effect parameters is analyzed.It is concluded that reasonable circle rotation project can eliminate calculation errors caused by body attitude and its error.The relationship between constant acceleration and deceleration model of rotational angular rate with calculation errors is analyzed.A rotation project is then designed. Experiment is conducted to obtain the size effect parameters with standard errors <2.3 mm().The mean parameters are then used to compensate the size effect of two-position alignment.Precision of the alignment is improved from 69.5″(3σ) to 47.2″(),demonstrating the feasibility of the method.

Key words: single-axial rotation, Strapdown Inertial Navigation System (SINS), size effect, body attitude, angular rate model, initial alignment

CLC Number: