With the development of EMC technology, EMC assessment has become increasingly important in EMC design. Although numerous EMC assessment models are available today, few of them can provide a tradeoff between efficienc...With the development of EMC technology, EMC assessment has become increasingly important in EMC design. Although numerous EMC assessment models are available today, few of them can provide a tradeoff between efficiency and accuracy for the specific case of military vehicular communication systems. Face to this situation, a modified four-level assessment model is proposed in the paper. First, the development of EMC assessment technology is briefly reviewed, and the theoretical mechanism of EMI environment is introduced. Then, the architecture of the proposed model is outlined, and the assessment methods are explored. To demonstrate the application of it, an example involving a communication system in a military vehicle is presented. From the physical layer to the signal layer, a hierarchical assessment on the entire system is successfully performed based on the proposed model, and we can make a qualitative EMC assessment on the EMC performance of the system. Based on a comparison with the traditional model, we conclude that the proposed model is more accurate, more efficient and less time-consuming, which is suitable for the EMC assessment on militaryvehicular communication systems. We hope that the proposed model will serve as a useful reference for system-level EMC assessments for other systems.展开更多
针对典型数字信号控制器(Digital Signal Controller,DSC)的电磁兼容问题,提出了电磁特性与温度特性相结合的分析方法,研究了环境温度对其传导电磁敏感度的影响.结合电磁敏感度行为级模型结构,分析了电磁干扰的作用机制,导出了DSC中金属...针对典型数字信号控制器(Digital Signal Controller,DSC)的电磁兼容问题,提出了电磁特性与温度特性相结合的分析方法,研究了环境温度对其传导电磁敏感度的影响.结合电磁敏感度行为级模型结构,分析了电磁干扰的作用机制,导出了DSC中金属-氧化物-半导体(Metal-Oxide-Semiconductor,MOS)器件阈值电压和迁移率随环境温度的变化关系;利用直接功率注入与环境温度联合控制技术,从实验和仿真两个方面分析了模型各部分特征参数在不同温度下的变化,揭示了电磁敏感度在不同环境温度下变化的内在因素,并测试了不同温度下典型DSC的电磁敏感度阈值.结果表明,DSC敏感度行为单元中MOS器件阈值电压和迁移率在不同温度下的变化,会造成其电磁敏感度随环境温度产生显著漂移.展开更多
基金supported by the National Moon Exploration Program of China (No. TY3Q20110020)in part supported by the 13th Five-Year Community Technology Research Program of National Equipment Development Department of China (No.41409020301)the National Natural Science Foundation of China (50971094)
文摘With the development of EMC technology, EMC assessment has become increasingly important in EMC design. Although numerous EMC assessment models are available today, few of them can provide a tradeoff between efficiency and accuracy for the specific case of military vehicular communication systems. Face to this situation, a modified four-level assessment model is proposed in the paper. First, the development of EMC assessment technology is briefly reviewed, and the theoretical mechanism of EMI environment is introduced. Then, the architecture of the proposed model is outlined, and the assessment methods are explored. To demonstrate the application of it, an example involving a communication system in a military vehicle is presented. From the physical layer to the signal layer, a hierarchical assessment on the entire system is successfully performed based on the proposed model, and we can make a qualitative EMC assessment on the EMC performance of the system. Based on a comparison with the traditional model, we conclude that the proposed model is more accurate, more efficient and less time-consuming, which is suitable for the EMC assessment on militaryvehicular communication systems. We hope that the proposed model will serve as a useful reference for system-level EMC assessments for other systems.
文摘针对典型数字信号控制器(Digital Signal Controller,DSC)的电磁兼容问题,提出了电磁特性与温度特性相结合的分析方法,研究了环境温度对其传导电磁敏感度的影响.结合电磁敏感度行为级模型结构,分析了电磁干扰的作用机制,导出了DSC中金属-氧化物-半导体(Metal-Oxide-Semiconductor,MOS)器件阈值电压和迁移率随环境温度的变化关系;利用直接功率注入与环境温度联合控制技术,从实验和仿真两个方面分析了模型各部分特征参数在不同温度下的变化,揭示了电磁敏感度在不同环境温度下变化的内在因素,并测试了不同温度下典型DSC的电磁敏感度阈值.结果表明,DSC敏感度行为单元中MOS器件阈值电压和迁移率在不同温度下的变化,会造成其电磁敏感度随环境温度产生显著漂移.
