| Nowadays Electro-Mechanical-Products (EMPs) are getting more and more complex, this brings the growing demands on function and performance with growing requirements on reliability and safety simultaneously for EMPs. Fault tolerance technology is an effective approach to enhance reliability and safety of EMPs. This paper takes research on technologies for fault tolerance and fault rectification design and simulation of EMPs as the main clue, a variety of hardware and software fault-tolerant technology and algorithm are studied deeply and systemly in this paper.A redundant fault-tolerant routing strategy and two assessment methodologies for chromosome fitness degree are proposed in this paper. The redundant routing strategy can tolerance not only the faults of modules, but also the faults of connection resources. Chromosome fitness degree assessment can guarantee that the best circuit is selected from a variety of available evolution circuits. Error detection mechanisms are studied for fault cells and line rails respectively. A parallel fault-tolerant system based on embryonal bionic hardware is presented, simulation results show that this system can realize fault-tolerance function well, and guarantee the reliability of system.A fault-tolerant middleware model based on Common Object Request Broker Architecture (CORBA) Pluggable Protocols Framework (PPF) is proposed in this paper, this model is highly configurable, follows the protocol of fault-tolerant CORBA, and maintains the interoperability and transplantability of object request broker (ORB) itself. As for the implementation of fault-tolerant strategy, an object-oriented implementation method for the fault-tolerant strategy is proposed, it is more flexible and scalable, and the design of program can take full advantage of the sophisticated fault-tolerant strategies to get better fault-tolerant performance and higher reliability for the system. As for error detection, a redundant and grade-progressive detection method is proposed, this method can enhance detection performance, avoid a failure of single point and miscarriage of detection, and increase error coverage rate,and avoid missing of detection.Based on research and analysis of existing research fruits of fault-tolerant scheduling, a novel planning period prediction based algorithm (PPPA), which is based on the planning period prediction table, is proposed in this paper. This algorithm can predict the executability of the primaries accurately and reduce the scheduling cost at the same time, by formulating the alternative scheduling table and the prediction table in planning period, it can revise the prediction table when the implementation error occurs, this allows the reimplementation of failure task when the time slices are sufficient, and guarantees the successful implementation of more primaries. Validity of this algorithm is proven by programming and simulation resultes.Mind evolutionary computation (MEC) is a novel intelligent computing algorithm. It can effectively avoid some essential drawbacks of genetic algorithm (GA), but yet there exists disadvantage of slow evolution speed in MEC. In order to increase the evolution speed of MEC, an adaptive mind-evolutionary algorithm (AMEA) is proposed via introducing three adaptive factors. An adaptive mind-evolutionary fault-tolerant control(AMEFTC) system, which can reconfigure the control law on-line, is constructed based on AMEA, and this fault-tolerant control system can maintain static and dynamic characteristics of normal system when faults occur within the system. Feasibility and effectiveness of the above fault-tolerant strategies are demonstrated by simulation examples.Technologies for fault tolerance and fault rectification design and simulation and algorithms for fault tolerance presented in this paper will provide some effective theories, methodologys and techniques for the implementation and application of fault tolerance and fault rectification function of EMPs. |
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