Design and Realization on Evolvable Circuit Self-Repair
This study exploits and tests the circuit self-repairing based on the evolution technology using Virtual Reconfigurable Circuit technology in order to further improve the viability of electronic system under a severe environment. First of all, this paper
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Abstract This study exploits and tests the circuit self-repairing based on the evolution technology using Virtual Reconfigurable Circuit technology in order to further improve the viability of electronic system under a severe environment. First of all, this paper builds a gate circuit model for the digital circuit evolution and designs a binary chromosome encoding according to Virtual Reconfigurable Circuit technology. Afterwards, it puts forwards the working process to realize circuit selfrepair and discusses ways to diagnose and repair circuit faults. In the simulation that a single particle in the space burns the logic gate in the DC brushless motor control circuit, common SA faults are produced, leading to abnormal operation of the motor. Finally, by means of online evolution method, the motor may rotate again by skipping wrong units. This experiment demonstrates that the evolution method may effectively solve SA faults in circuits, thus improving the reliability of circuits. Keywords Evolvable circuit • Self-repairing • Virtual reconfigurable circuit • Chromosome encoding
1 Introduction As the electronic technology develops rapidly, it becomes increasingly complex, accompanied by a larger error rate. For example, in the application field of space technology, such high-energy particles as X-ray in the space may seriously affect its performance and reliability in the core control parts of an on-orbit spacecraft. In September 1988 and September 1990, China launched two polar orbiting meteorological satellites of FY-1A and FY-1B successively, both of which were out of order respectively after they have operated normally for 3 days and 165 days due to
J. Lou • C. Li (*) • J. Yu • J. Chu Mechanical Engineering College, Shijiazhuang, China e-mail: [email protected] W. Wang (ed.), Mechatronics and Automatic Control Systems, Lecture Notes in Electrical Engineering 237, DOI 10.1007/978-3-319-01273-5_56, © Springer International Publishing Switzerland 2014
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the space particle bombardment on the on-board control system. Besides, technicians could not repair them at site, which, however, may be solved by the evolvable hardware technology. Upon the completion of traditional electronic equipments, their inner structures and functions may not be easily changed and self-repairing may not be realized in case of faults. However, the evolvable hardware provides a technology used in the self-repairing of the electronic system. Thompson and others from Britain put forward an idea of using genetic algorithm to reconfigure a system with a fault and recover it. With the genetic algorithm, they conducted on-line self-diagnosis and self-repairing on the full adder and double-digit multiplier, etc. [1]. Researchers of U.S. Jet Propulsion Laboratory conducted self-repairing experiment on the halfwave rectifier under 300 K Rad TID (Total Ionizing Dose), 196 C, 280 C, and other extreme environments by the use of a stand-alone board-level evolvable system [2, 3]. There are some papers show about circuits
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