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为了使数字电路在产生故障失效后实现功能自动恢复,提高电路可靠性,基于演化硬件(EHW)原理建立了自修复数字电路模型,该模型主要包括微处理器和重配置电路2个部分。利用自修复数字电路模型实现无刷直流电机控制系统中的换相电路,并对换相电路进行了故障注入修复实验。深入分析了自修复数字电路模型对电路演化修复的影响,通过引入关键函数对自修复数字电路模型进行了改进。实验结果表明,当注入故障单元数小于总单元数的50%时,改进后的自修复数字电路模型修复率达到100%。因此,该模型能够对部分故障进行成功修复,改进的自修复数字电路模型降低了电路生成时间,提高了电路修复概率和速度。
In order to make the digital circuit recover automatically after the failure, and to improve the circuit reliability, a self-healing digital circuit model based on evolution hardware (EHW) principle is established. The model mainly consists of two parts: microprocessor and reconfiguration circuit. The self-repairing digital circuit model is used to realize the commutation circuit in the brushless DC motor control system, and the fault injection repair experiment is carried out on the commutation circuit. In-depth analysis of self-healing digital circuit model on the evolution of circuit repair, by introducing the key function of self-healing digital circuit model was improved. Experimental results show that when the number of failed cells is less than 50% of the total number of cells, the improved self-healing digital circuit model repair rate reaches 100%. Therefore, the model can successfully repair partial faults. The improved self-healing digital circuit model reduces the circuit generation time and improves the probability and speed of circuit repair.