To promote the modeling standardization process of the integrated circuits, an improved electrical simulation model for a direct power injection （DPI） setup which was used to measure the conducted immunity of a 16-b...To promote the modeling standardization process of the integrated circuits, an improved electrical simulation model for a direct power injection （DPI） setup which was used to measure the conducted immunity of a 16-bit microcontroller to radio frequency aggression was investigated. Based on the existing model of the same microcontroller, the PDN module was modified by adding the core, PLL and MD network models, which could reflect the actual electric distribution situation within the microcontroller more accurately. By comparing the simulation results with the measurement results, the effectiveness of the modified model can be improved to 500 MHz, and its uncertainty is within ＋1.8 dB （＋2 dB is acceptable）. Then, to improve the simulation accuracy of the complete model in the high frequency range, the I/O model which contained the dynamic and nonlinear characteristics reflecting the variation of the internal impedance of the microcontroller with increasing the frequency of the external noise was introduced. By comparing the simulation results with the measurement results, the effectiveness of the second modified model can be improved up to 1.4 GHz with the uncertainty of ~1.8 dB. Thus, a conclusion can be reached that the proposed model can be applied to a much wider frequency range with a smaller uncertainty than the latest model of the similar type. Furthermore, associated with the electromagnetic emission testing platform model, the PDN module can also be used to predict the electromagnetic conducted and radiated emission characteristics. This modeling method can also be applied to other integrated circuits, which is very helpful to the standardization of the IC electromagnetic compatibility （EMC） modeling process.展开更多
提出1种描述微控制器直接功率注入(direct power injection,DPI)测量电磁传导抗扰度特性的模型.该模型在国际已有模型的基础上,在PDN模块中增加了内核网络、PLL,A/D网络等模型,能更精确的反映PDN的物理情况,同时能实现集成电路电磁兼容...提出1种描述微控制器直接功率注入(direct power injection,DPI)测量电磁传导抗扰度特性的模型.该模型在国际已有模型的基础上,在PDN模块中增加了内核网络、PLL,A/D网络等模型,能更精确的反映PDN的物理情况,同时能实现集成电路电磁兼容模型的标准化建模.最后,在不同频率的射频电磁干扰下对微控制器被测I/O端口抗扰度进行仿真分析,并与测量结果对比,结果表明在500 MHz以下,模型预测抗扰度的不确定度在允许范围内.该模型应用于PCB级别,可精确仿真PCB板的电磁兼容情况,仿真精度远高于使用IBIS模型.展开更多
以一台1.5 T VVT缸内直喷氢内燃机为原型机搭建一维GT-POWER模型,研究进排气门正时变化对发动机的换气过程、动力性及经济性的影响。发动机转速为2700 r/min,外特性工况时保持氢气量一致,采用稀薄燃烧模式,进气门正时提前、排气门正时...以一台1.5 T VVT缸内直喷氢内燃机为原型机搭建一维GT-POWER模型,研究进排气门正时变化对发动机的换气过程、动力性及经济性的影响。发动机转速为2700 r/min,外特性工况时保持氢气量一致,采用稀薄燃烧模式,进气门正时提前、排气门正时推迟策略可使进气质量流量增大,有效热效率由40.8%提高到41.07%,有效燃气消耗率下降。发动机转速为5500 r/min,外特性工况时保持过量空气系数一致,进排气门同时推迟策略可使缸内气体质量增多,泵气损失降低,功率提高12.7%,有效燃气消耗率小幅降低。其中,排气门正时变化对直喷氢内燃机动力性及经济性的影响较进气门更为显著。展开更多
针对电压不平衡条件下VSC-MVDC系统的控制,提出了基于比例积分微分（proportional-integral-derivative,PID）加谐振（proportional-integral-derivative plus resonant,PIDR）的滑模直接功率控制（sliding mode control direct power c...针对电压不平衡条件下VSC-MVDC系统的控制,提出了基于比例积分微分（proportional-integral-derivative,PID）加谐振（proportional-integral-derivative plus resonant,PIDR）的滑模直接功率控制（sliding mode control direct power control,SMC DPC）策略。推导出一种在保证网侧电流无畸变的条件下对有功和无功纹波幅值之比连续调节的方法。为消除无功纹波对有功输出的影响,提出一种逆向有功纹波注入的策略。应用滑模控制方法设计了包含比例、积分、微分和谐振等控制律的跟踪控制器。其中,谐振控制用于消除有功和无功动态之间耦合对控制性能的影响,有功和无功参考的微分通过简单的代数运算得到。有功和无功纹波控制目标实质相同,对有功采用PIDR而无功采用PID即可实现精确的功率控制。基于SIMULINK/MATLAB平台对一个两端VSC-MVDC系统进行仿真实验,验证了该PIDRSMC DPC策略的有效性。展开更多
基金Project(2007dfa71250) supported by the International Science and Technology Cooperative Program of ChinaProject(20062250) supported by the Doctor Fund of North China Electric Power University, China
文摘To promote the modeling standardization process of the integrated circuits, an improved electrical simulation model for a direct power injection （DPI） setup which was used to measure the conducted immunity of a 16-bit microcontroller to radio frequency aggression was investigated. Based on the existing model of the same microcontroller, the PDN module was modified by adding the core, PLL and MD network models, which could reflect the actual electric distribution situation within the microcontroller more accurately. By comparing the simulation results with the measurement results, the effectiveness of the modified model can be improved to 500 MHz, and its uncertainty is within ＋1.8 dB （＋2 dB is acceptable）. Then, to improve the simulation accuracy of the complete model in the high frequency range, the I/O model which contained the dynamic and nonlinear characteristics reflecting the variation of the internal impedance of the microcontroller with increasing the frequency of the external noise was introduced. By comparing the simulation results with the measurement results, the effectiveness of the second modified model can be improved up to 1.4 GHz with the uncertainty of ~1.8 dB. Thus, a conclusion can be reached that the proposed model can be applied to a much wider frequency range with a smaller uncertainty than the latest model of the similar type. Furthermore, associated with the electromagnetic emission testing platform model, the PDN module can also be used to predict the electromagnetic conducted and radiated emission characteristics. This modeling method can also be applied to other integrated circuits, which is very helpful to the standardization of the IC electromagnetic compatibility （EMC） modeling process.
文摘提出1种描述微控制器直接功率注入(direct power injection,DPI)测量电磁传导抗扰度特性的模型.该模型在国际已有模型的基础上,在PDN模块中增加了内核网络、PLL,A/D网络等模型,能更精确的反映PDN的物理情况,同时能实现集成电路电磁兼容模型的标准化建模.最后,在不同频率的射频电磁干扰下对微控制器被测I/O端口抗扰度进行仿真分析,并与测量结果对比,结果表明在500 MHz以下,模型预测抗扰度的不确定度在允许范围内.该模型应用于PCB级别,可精确仿真PCB板的电磁兼容情况,仿真精度远高于使用IBIS模型.
文摘以一台1.5 T VVT缸内直喷氢内燃机为原型机搭建一维GT-POWER模型,研究进排气门正时变化对发动机的换气过程、动力性及经济性的影响。发动机转速为2700 r/min,外特性工况时保持氢气量一致,采用稀薄燃烧模式,进气门正时提前、排气门正时推迟策略可使进气质量流量增大,有效热效率由40.8%提高到41.07%,有效燃气消耗率下降。发动机转速为5500 r/min,外特性工况时保持过量空气系数一致,进排气门同时推迟策略可使缸内气体质量增多,泵气损失降低,功率提高12.7%,有效燃气消耗率小幅降低。其中,排气门正时变化对直喷氢内燃机动力性及经济性的影响较进气门更为显著。
文摘针对电压不平衡条件下VSC-MVDC系统的控制,提出了基于比例积分微分（proportional-integral-derivative,PID）加谐振（proportional-integral-derivative plus resonant,PIDR）的滑模直接功率控制（sliding mode control direct power control,SMC DPC）策略。推导出一种在保证网侧电流无畸变的条件下对有功和无功纹波幅值之比连续调节的方法。为消除无功纹波对有功输出的影响,提出一种逆向有功纹波注入的策略。应用滑模控制方法设计了包含比例、积分、微分和谐振等控制律的跟踪控制器。其中,谐振控制用于消除有功和无功动态之间耦合对控制性能的影响,有功和无功参考的微分通过简单的代数运算得到。有功和无功纹波控制目标实质相同,对有功采用PIDR而无功采用PID即可实现精确的功率控制。基于SIMULINK/MATLAB平台对一个两端VSC-MVDC系统进行仿真实验,验证了该PIDRSMC DPC策略的有效性。
