红外与激光工程
紅外與激光工程
홍외여격광공정
INFRARED AND LASER ENGINEERING
2014年
8期
2505-2512
,共8页
最佳探测波段%多波段等效黑体温度%空间目标%诱饵
最佳探測波段%多波段等效黑體溫度%空間目標%誘餌
최가탐측파단%다파단등효흑체온도%공간목표%유이
best detection bands%equivalent blackbody temperature in several bands(EBTSB)%spatial point-target%decoy
低信噪比情况对空间点目标的识别仍然是很困难的问题，尤其在区分卫星目标和系留诱饵等干扰时尤为困难。此时系留诱饵与目标具有相同的运动轨迹和相似的外形特性，因而所能利用的差异仅有辐射特性差异。然而提取多光谱辐射差异并不是简单的问题，尤其是辐射会受到探测距离、探测角度的影响。基于目标和诱饵等干扰具有不同辐射强度及辐射变化频率的特点，建立了空间目标等效黑体温度的概念。并相应的设计了等效黑体温度的计算模型，该模型可以有效的减小空间环境的干扰而充分体现目标和诱饵等干扰的辐射差异。然而由于噪声的干扰，此模型会产生计算误差，并且不同的探测波段组合具有不同的误差传递能力。为了使这种噪声引起的误差最小，需要确定最佳的探测波段。通过计算噪声存在情况下，误差随探测波段参数的变化趋势，获得了最佳探测双波段、最佳探测多波段和最佳探测波段数。通过分析仿真实验的结果，使用最佳探测双波段可以减小20%的误差，而最佳探测多波段会进一步的减小20%的误差，这种结果证明了文中研究结论的正确性。
低信譟比情況對空間點目標的識彆仍然是很睏難的問題，尤其在區分衛星目標和繫留誘餌等榦擾時尤為睏難。此時繫留誘餌與目標具有相同的運動軌跡和相似的外形特性，因而所能利用的差異僅有輻射特性差異。然而提取多光譜輻射差異併不是簡單的問題，尤其是輻射會受到探測距離、探測角度的影響。基于目標和誘餌等榦擾具有不同輻射彊度及輻射變化頻率的特點，建立瞭空間目標等效黑體溫度的概唸。併相應的設計瞭等效黑體溫度的計算模型，該模型可以有效的減小空間環境的榦擾而充分體現目標和誘餌等榦擾的輻射差異。然而由于譟聲的榦擾，此模型會產生計算誤差，併且不同的探測波段組閤具有不同的誤差傳遞能力。為瞭使這種譟聲引起的誤差最小，需要確定最佳的探測波段。通過計算譟聲存在情況下，誤差隨探測波段參數的變化趨勢，穫得瞭最佳探測雙波段、最佳探測多波段和最佳探測波段數。通過分析倣真實驗的結果，使用最佳探測雙波段可以減小20%的誤差，而最佳探測多波段會進一步的減小20%的誤差，這種結果證明瞭文中研究結論的正確性。
저신조비정황대공간점목표적식별잉연시흔곤난적문제，우기재구분위성목표화계류유이등간우시우위곤난。차시계류유이여목표구유상동적운동궤적화상사적외형특성，인이소능이용적차이부유복사특성차이。연이제취다광보복사차이병불시간단적문제，우기시복사회수도탐측거리、탐측각도적영향。기우목표화유이등간우구유불동복사강도급복사변화빈솔적특점，건립료공간목표등효흑체온도적개념。병상응적설계료등효흑체온도적계산모형，해모형가이유효적감소공간배경적간우이충분체현목표화유이등간우적복사차이。연이유우조성적간우，차모형회산생계산오차，병차불동적탐측파단조합구유불동적오차전체능력。위료사저충조성인기적오차최소，수요학정최가적탐측파단。통과계산조성존재정황하，오차수탐측파단삼수적변화추세，획득료최가탐측쌍파단、최가탐측다파단화최가탐측파단수。통과분석방진실험적결과，사용최가탐측쌍파단가이감소20%적오차，이최가탐측다파단회진일보적감소20%적오차，저충결과증명료문중연구결론적정학성。
In low SNR cases, the distinction between spatial point-target and interferences like decoys is still a very difficult problem, especial between the satellites target and mooring decoys. At that time decoys have the same orbit and similar shape with the spatial target, so that only could be used to distinguish the target is the radiation difference. However it is not easy to extract the multi-spectral radiation which is influenced by the detection distance and observation angle. In this paper, based on the characteristics that target and interferences like decoys and noise have different radiation intensity and radiation changing frequency, the concept of the equivalent blackbody temperature in several bands (EBTSB) was built. Then the calculation model of EBTSB was designed, which could effectively reduce the interference of the space environment and fully showed the radiation differences between point-target and interferences like decoys. Under noises interference, this model would produce calculation error, and different bands combinations had different error transmission capacity. In order to make error minimum, the best detection bands need to be determined. In this paper, the best detection dual-bands and the best detection multi-bands were obtained by calculating the trend of error with the band parameters under noises interference. By analyzing the results of the simulation experiments, the best detection dual-band will have 20% advantage and the best detection multi-bands will further reduce error 20%, which prove the correctness of the conclusions of this paper.
