为了有效增加合成射流激励器的放电强度,提高放电稳定性,使用直流电源和不同类型的触发电源,对三电极合成射流激励器的放电特性进行研究,提出了设计准则,优化了电极布局。结果表明:触发电源脉冲电压的上升时间对触发特性有重要的影响。...为了有效增加合成射流激励器的放电强度,提高放电稳定性,使用直流电源和不同类型的触发电源,对三电极合成射流激励器的放电特性进行研究,提出了设计准则,优化了电极布局。结果表明:触发电源脉冲电压的上升时间对触发特性有重要的影响。纳秒触发源电压上升时间与击穿延迟时间相近,可促使2个放电通道同时形成,实现同时击穿;微秒触发源配合直流激励只能使2个放电通道依次形成,放电模式为依次击穿。三电极合成射流激励器的放电通道长度和稳定放电时放电通道的可调节范围由触发电源与直流电源共同决定。采用纳秒脉冲触发源和较大的直流电压激励时,可显著提高三电极合成射流激励器的最大放电间距和放电稳定性。在4 k V直流激励下微秒脉冲触发形成的最大间距为7.5 mm,而在无直流电压输入时,纳秒脉冲触发形成的最大放电间距已达10 mm。当施加-4 k V直流电压时,纳秒脉冲触发形成的最大放电间距更是达到了17.5 mm。展开更多
Phased array radar has been applied broadly because of its sound performance.But signal of phased array radar is of a wide variety of types.Therefore,recognition of phased array radar is the most puzzling aspect of th...Phased array radar has been applied broadly because of its sound performance.But signal of phased array radar is of a wide variety of types.Therefore,recognition of phased array radar is the most puzzling aspect of the whole emitter identification domain.To solve the problem,the article proposes the method that identifies phased array radar by pulse amplitude information,and studies the phased array radar,models transmit signal of them,and receiving signal by radar countermeasure reconnaissance receiver.From constructing template of pulse train's amplitude vector of mechanical scanning radar,computing distance of samples and standard template,finding threshold of the template matching arithmetic,the article puts forward the template matching algorithm of radar beam scan type recognition to identify phased array radar automatically.展开更多
文摘为了有效增加合成射流激励器的放电强度,提高放电稳定性,使用直流电源和不同类型的触发电源,对三电极合成射流激励器的放电特性进行研究,提出了设计准则,优化了电极布局。结果表明:触发电源脉冲电压的上升时间对触发特性有重要的影响。纳秒触发源电压上升时间与击穿延迟时间相近,可促使2个放电通道同时形成,实现同时击穿;微秒触发源配合直流激励只能使2个放电通道依次形成,放电模式为依次击穿。三电极合成射流激励器的放电通道长度和稳定放电时放电通道的可调节范围由触发电源与直流电源共同决定。采用纳秒脉冲触发源和较大的直流电压激励时,可显著提高三电极合成射流激励器的最大放电间距和放电稳定性。在4 k V直流激励下微秒脉冲触发形成的最大间距为7.5 mm,而在无直流电压输入时,纳秒脉冲触发形成的最大放电间距已达10 mm。当施加-4 k V直流电压时,纳秒脉冲触发形成的最大放电间距更是达到了17.5 mm。
基金Supported by the National Science and Technology Supported Program of China(No.2011BAH24B06)
文摘Phased array radar has been applied broadly because of its sound performance.But signal of phased array radar is of a wide variety of types.Therefore,recognition of phased array radar is the most puzzling aspect of the whole emitter identification domain.To solve the problem,the article proposes the method that identifies phased array radar by pulse amplitude information,and studies the phased array radar,models transmit signal of them,and receiving signal by radar countermeasure reconnaissance receiver.From constructing template of pulse train's amplitude vector of mechanical scanning radar,computing distance of samples and standard template,finding threshold of the template matching arithmetic,the article puts forward the template matching algorithm of radar beam scan type recognition to identify phased array radar automatically.
