College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China.
Rev Sci Instrum. 2023 Jan 1;94(1):015101. doi: 10.1063/5.0122246.
This study assessed the survivability of an engine control system under intense electromagnetic pulses. It investigated the electromagnetic sensitivity of the system under the action of intense electromagnetic pulses. In this work, the evaluation focuses on the terminal circuit of the control system. It proposes a co-design method for electromagnetic pulse protection circuits on a printed circuit board. The electromagnetic interference mechanism and phenomena were analyzed through simulation and experiments. The electromagnetic susceptibility of the control system was tested using the bulk current injection test method, and the pulse coupling signal of the sensitive part was obtained. Subsequently, the terminal circuit was analyzed using a numerical calculation method. The pulse coupling signal was injected into the terminal circuit. Thus, we can determine why the control system exhibits sensitive phenomena. Then, a protection circuit of the terminal circuit was established. The design method's advantage is accurately locating the circuit's sensitive points and reducing the controller circuit's electromagnetic sensitivity by designing the circuit without drastically changing the original circuit. At the same time, the redundancy of protection circuit design can be effectively reduced.
本研究评估了发动机控制系统在高强度电磁脉冲下的生存能力。研究了系统在高强度电磁脉冲作用下的电磁敏感性。在这项工作中，评估集中在控制系统的终端电路上。提出了一种在印制电路板上进行电磁脉冲保护电路协同设计的方法。通过仿真和实验分析了电磁干扰的机理和现象。采用共模电流注入测试方法对控制系统的电磁敏感性进行了测试，得到了敏感部分的脉冲耦合信号。然后，采用数值计算方法对终端电路进行了分析。将脉冲耦合信号注入到终端电路中，从而确定了控制系统表现出敏感现象的原因。然后，建立了终端电路的保护电路。该设计方法的优点是能够准确地找到电路的敏感点，并通过设计电路而不显著改变原电路来降低控制器电路的电磁敏感性。同时，可以有效地减少保护电路设计的冗余。
