基于修正差分进化算法确定周期内多载波微放电等效功率

发布时间：2018-05-18 09:34

  本文选题：差分进化算法 + 周期内多载波微放电　； 参考：《中国空间科学技术》2017年02期

【摘要】：微放电是空间微波部件设计所必须考虑的失效效应之一,随着空间宽带多载波模式的广泛采用,多载波条件下微波部件微放电问题引起广泛关注。针对周期内多载波微放电等效功率计算所采用传统经验公式的不足,提出了一种基于修正差分进化算法的确定周期内多载波微放电等效功率的全局优化方法。该方法通过对多载波合成信号功率特性进行分析,推导获得了20个电子渡越时间内信号能量的表达式,采用二次插值法进行局部搜索,采用修正差分进化算法进行全局优化,从而高效、准确获得全局最优解。以幅度相等、频率间隔相等的多载波信号为例,进行了等效功率的确定,与经验公式的预测结果相当,验证了所提出方法的有效性;同时,对幅度不同、频率间隔不等的多载波信号进行了处理,获得了能够指导微波部件微放电设计的最坏状态及其等效功率。所提出方法不仅适用于幅度不同、频率间隔不等的多载波信号情况,并且能够提供微放电最坏状态时的相位分布,为多载波微放电实验验证提供相位输入。所提出方法相比传统的基于经验公式的方法具有明显优势,为空间宽带多载波工作微波部件微放电设计提供有效依据,在卫星转发器多载波微放电分析及设计中具有价值。
[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.
【作者单位】： 西安交通大学电子物理与器件教育部重点实验室;中国空间技术研究院西安分院空间微波技术重点实验室;浙江大学应用电磁波研究实验室;
【基金】：国家自然科学基金(U1537211,11675278,51675421) 空间微波技术重点实验室基金重点项目(9140C530101150C53011)
【分类号】：O46;TP18
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本文编号：1905330