Dual Microcontroller Redundancy System for Critical Applications

Along with wide applications of the powerful MCU in the control fields, the fault-tolerant control system has developed quickly. In some specific occasions, very high security, dependability and usability of the system must be needed, such as in Aero-Space, military, railway, petroleum, chemical industry, electricity and some the important departments and computer control systems working under the abominable environments, Two pieces of the module of one pair of redundant systems carry out the same operation at the same time. When one piece of the module among them breaks down, the other can judge and switch over automatically to keep the system stable reliable and incessant working. Double Redundancy not only has higher dependability, but also has very high security, so it is very popular used in the controlled fields. This paper argues that redundancy in engineering, should be understood as a "design paradigm\´ that frames regulatory assessments and interpretations of all complex technical systems, profoundly shaping decisions and judgments about modern technologies. It will further argue that the "redundancy paradigm\´ used by regulators contains epistemic ambiguities that lead to imperfect predictions about the effects of redundancy in practice.