Open plasma stealth technology excited by radionuclides is known to have several problems:(1)owing to disturbance from airflow,the plasma distribution is unstable.(2)The plasma is highly dependent on the atmosphere;th...Open plasma stealth technology excited by radionuclides is known to have several problems:(1)owing to disturbance from airflow,the plasma distribution is unstable.(2)The plasma is highly dependent on the atmosphere;therefore,it is difficult to modulate in target stealth.(3)Concerns regarding radiation harassment prevent the application of this method.To avoid these problems,an enclosed plasma stealth method is introduced.Via simulation on an infinite conducting plate,this method was found to effectively solve the above concerns,which may offer a new approach for the practical application of plasma stealth technology excited by radionuclides,especially for small-satellite stealth because of its lightweight and selfprovided plasma.展开更多
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 realtime two-channel beam pointin...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 realtime 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.展开更多
文摘Open plasma stealth technology excited by radionuclides is known to have several problems:(1)owing to disturbance from airflow,the plasma distribution is unstable.(2)The plasma is highly dependent on the atmosphere;therefore,it is difficult to modulate in target stealth.(3)Concerns regarding radiation harassment prevent the application of this method.To avoid these problems,an enclosed plasma stealth method is introduced.Via simulation on an infinite conducting plate,this method was found to effectively solve the above concerns,which may offer a new approach for the practical application of plasma stealth technology excited by radionuclides,especially for small-satellite stealth because of its lightweight and selfprovided plasma.
文摘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 realtime 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.
