The protection design method of the engine control system under electromagnetic pulses

Area of Science:

• Electrical Engineering
• Electromagnetics
• Control Systems

Background:

• Engine control systems are vulnerable to intense electromagnetic pulses (EMPs).
• Assessing and mitigating electromagnetic sensitivity is crucial for system survivability.
• Existing protection methods may be inefficient or alter original circuit designs.

Purpose of the Study:

• To evaluate the survivability of an engine control system under intense EMPs.
• To propose a co-design method for electromagnetic pulse protection circuits on printed circuit boards (PCBs).
• To analyze electromagnetic interference mechanisms and reduce system electromagnetic sensitivity.

Main Methods:

• Simulation and experimental analysis of electromagnetic interference (EMI) phenomena.
• Bulk current injection (BCI) testing to determine electromagnetic susceptibility.
• Numerical calculation methods for terminal circuit analysis and pulse coupling signal injection.
• Development of a co-design method for PCB protection circuits.

Main Results:

• Identified sensitive points within the engine control system's terminal circuit.
• Quantified the pulse coupling signal affecting sensitive components.
• Successfully developed and validated a protection circuit design method.
• Demonstrated reduction in controller circuit electromagnetic sensitivity without significant design changes.

Conclusions:

• The proposed co-design method accurately locates sensitive circuit points for EMP protection.
• The method effectively reduces electromagnetic sensitivity of engine control systems.
• This approach minimizes redundancy in protection circuit design while maintaining system integrity.