ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Size parameters identification and rotation project design for single-axis rotary SINS
Received date: 2016-10-11
Revised date: 2016-12-12
Online published: 2016-12-12
Supported by
National Natural Science Foundation of China(41174162)
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(1σ).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″(3σ),demonstrating the feasibility of the method.
GUO Qi , ZHOU Zhaofa , SUN Lijiang , XU Zihao , CHEN He . Size parameters identification and rotation project design for single-axis rotary SINS[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017 , 38(10) : 320841 -320841 . DOI: 10.7527/S1000-6893.2016.320841
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