本文選題：差分進化算法 + 周期內多載波微放電��； 參考：《中國空間科學技術》2017年02期

【摘要】：微放電是空間微波部件設計所必須考慮的失效效應之一,隨著空間寬帶多載波模式的廣泛采用,多載波條件下微波部件微放電問題引起廣泛關注。針對周期內多載波微放電等效功率計算所采用傳統(tǒng)經驗公式的不足,提出了一種基于修正差分進化算法的確定周期內多載波微放電等效功率的全局優(yōu)化方法。該方法通過對多載波合成信號功率特性進行分析,推導獲得了20個電子渡越時間內信號能量的表達式,采用二次插值法進行局部搜索,采用修正差分進化算法進行全局優(yōu)化,從而高效、準確獲得全局最優(yōu)解。以幅度相等、頻率間隔相等的多載波信號為例,進行了等效功率的確定,與經驗公式的預測結果相當,驗證了所提出方法的有效性;同時,對幅度不同、頻率間隔不等的多載波信號進行了處理,獲得了能夠指導微波部件微放電設計的最壞狀態(tài)及其等效功率。所提出方法不僅適用于幅度不同、頻率間隔不等的多載波信號情況,并且能夠提供微放電最壞狀態(tài)時的相位分布,為多載波微放電實驗驗證提供相位輸入。所提出方法相比傳統(tǒng)的基于經驗公式的方法具有明顯優(yōu)勢,為空間寬帶多載波工作微波部件微放電設計提供有效依據,在衛(wèi)星轉發(fā)器多載波微放電分析及設計中具有價值。
[Abstract]:Microdischarge is one of the failure effects that must be considered in the design of space microwave components. With the wide use of spatial broadband multicarrier mode, the micro-discharge of microwave components under multi-carrier conditions has attracted wide attention. A global optimization method for determining the equivalent power of multicarrier micro-discharge within a period is proposed based on modified differential evolutionary algorithm (modified differential evolutionary algorithm) to overcome the shortcomings of the traditional empirical formula used in the calculation of the equivalent power of multi-carrier micro-discharge within a period. By analyzing the power characteristics of multi-carrier synthesizer signal, the expression of signal energy in 20 electron transit time is derived, the local search is carried out by quadratic interpolation method, and the global optimization is carried out by modified differential evolution algorithm. Therefore, the global optimal solution is obtained efficiently and accurately. Taking the multicarrier signal with equal amplitude and equal frequency interval as an example, the equivalent power is determined, which is equivalent to the prediction result of the empirical formula, which verifies the validity of the proposed method, and at the same time, the amplitude is different. The multi-carrier signals with different frequency intervals are processed to obtain the worst state and equivalent power which can guide the design of micro-discharge of microwave components. The proposed method is not only suitable for multi-carrier signals with different amplitude and different frequency intervals, but also can provide phase distribution in the worst state of micro-discharge and provide phase input for verification of multi-carrier micro-discharge experiments. Compared with the traditional method based on empirical formula, the proposed method has obvious advantages, which provides an effective basis for the design of microdischarge of space wideband multi-carrier operating microwave components, and is valuable in the analysis and design of multi-carrier micro-discharge of satellite transponders.
【作者單位】： 西安交通大學電子物理與器件教育部重點實驗室;中國空間技術研究院西安分院空間微波技術重點實驗室;浙江大學應用電磁波研究實驗室;
【基金】：國家自然科學基金(U1537211,11675278,51675421) 空間微波技術重點實驗室基金重點項目(9140C530101150C53011)
【分類號】：O46;TP18
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本文編號：1905330