星载自适应容错系统粒子探测器研究进展
A Review of Particle Detectors for Space-Borne Self-Adaptive Fault-Tolerant Systems
摘要：
在空间环境中工作的集成电路，由于辐射强度的变化，其软错误率（SER）会发生几个数量级的变化。为了在不影响系统性能的情况下确保辐射硬度，有必要实施可以在临界辐射暴露下激活的动态硬化机制。这种操作场景需要实时检测负责软错误的高能粒子。虽然已经报道了许多粒子探测解决方案，但很少有工作涉及适合于空间任务的自适应容错微处理器系统的片上粒子探测器。本文综述了粒子探测器的发展现状，重点介绍了两种自适应系统的解决方案：基于嵌入式SRAM的粒子探测器和基于脉冲展宽逆变器的粒子探测器。
英文摘要：
The soft error rate (SER) of integrated circuits (ICs) operating in space environment may vary by several orders of magnitude due to the variable intensity of radiation exposure. To ensure the radiation hardness without compromising the system performance, it is necessary to implement the dynamic hardening mechanisms which can be activated under the critical radiation exposure. Such operating scenario requires the real-time detection of energetic particles responsible for the soft errors. Although numerous particle detection solutions have been reported, very few works address the on-chip particle detectors suited for the self-adaptive fault tolerant microprocessor systems for space missions. This work reviews the state-of-the-art particle detectors, with emphasis on two solutions for the self-adaptive systems: particle detector based on embedded SRAM and particle detector based on pulse stretching inverters.
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