TY - JOUR
T1 - Beam-pointing error compensation method of phased array radar seeker with phantom-bit technology
AU - WEN, Qiuqiu
AU - LU, Tianyu
AU - XIA, Qunli
AU - SUN, Zedong
N1 - Publisher Copyright:
© 2017 Chinese Society of Aeronautics and Astronautics
PY - 2017/6
Y1 - 2017/6
N2 - A phased array radar seeker (PARS) must be able to effectively decouple body motion and accurately extract the line-of-sight (LOS) rate for target missile tracking. In this study, the real-time two-channel beam pointing error (BPE) compensation method of PARS for LOS rate extraction is designed. The PARS discrete beam motion principium is analyzed, and the mathematical model of beam scanning control is finished. According to the principle of the antenna element shift phase, both the antenna element shift phase law and the causes of beam-pointing error under phantom-bit conditions are analyzed, and the effect of BPE caused by phantom-bit technology (PBT) on the extraction accuracy of the LOS rate is examined. A compensation method is given, which includes coordinate transforms, beam angle margin compensation, and detector dislocation angle calculation. When the method is used, the beam angle margin in the pitch and yaw directions is calculated to reduce the effect of the missile body disturbance and to improve LOS rate extraction precision by compensating for the detector dislocation angle. The simulation results validate the proposed method.
AB - A phased array radar seeker (PARS) must be able to effectively decouple body motion and accurately extract the line-of-sight (LOS) rate for target missile tracking. In this study, the real-time two-channel beam pointing error (BPE) compensation method of PARS for LOS rate extraction is designed. The PARS discrete beam motion principium is analyzed, and the mathematical model of beam scanning control is finished. According to the principle of the antenna element shift phase, both the antenna element shift phase law and the causes of beam-pointing error under phantom-bit conditions are analyzed, and the effect of BPE caused by phantom-bit technology (PBT) on the extraction accuracy of the LOS rate is examined. A compensation method is given, which includes coordinate transforms, beam angle margin compensation, and detector dislocation angle calculation. When the method is used, the beam angle margin in the pitch and yaw directions is calculated to reduce the effect of the missile body disturbance and to improve LOS rate extraction precision by compensating for the detector dislocation angle. The simulation results validate the proposed method.
KW - Beam scanning control
KW - Beam-pointing error
KW - Line-of-sight rate extraction
KW - Phantom-bit technology
KW - Phased array radar seeker
UR - http://www.scopus.com/inward/record.url?scp=85019991902&partnerID=8YFLogxK
U2 - 10.1016/j.cja.2017.03.020
DO - 10.1016/j.cja.2017.03.020
M3 - Article
AN - SCOPUS:85019991902
SN - 1000-9361
VL - 30
SP - 1217
EP - 1230
JO - Chinese Journal of Aeronautics
JF - Chinese Journal of Aeronautics
IS - 3
ER -
