Research On Self-organization And Self-repairing Of Bio-inspired Electronic Array Based On Membrane Computing

With the rapid development of space exploration,more and more mechatronic equipment is sent into space.Due to severe environmental co nditions of space,the digital circuit module of mechatronic equipment easily breaks down,and the circuit failure cannot be directly repaired by manpower.Therefore,improving the mission reliability and environmental adaptability of digital circuits is critical to enhance the mission reliability of mechatronic equipment.Self-healing ability is common characteristics of the organisms.It inspires a new way to design a digital circuit with high reliability which mimics the organisms' self-healing mechanism.O n the basis of studying the self-healing process of biological organisms,a novel design method of bio-inspired electronic array is proposed by mimicking the structure,developmental and healing mechanism of cells and organisms.After that,membrane computing is introduced into the design process of bio-inspired electronic array,focusing on the method of self-organizing and self-repairing.Fina lly,a self-organizing and self-repairing bio-inspired electronic array is constructed.The detailed contents and innovative works are shown in the following sections:(1)An online self-organizing method for bio-inspired electronic array is proposed.It has disadvantages of low efficiency and the great work load to generate configuration information of bio-inspired electronic array in offline manner.Moreover,all cells need to store the array configuration information,which consumes a large quantity of storage resources.To solve this problem,the online self-organizing method of bio-inspired electronic array is studied.Based on population P systems,an online self-organizing method of bio-inspired electronic array is proposed.Inspired from the progressive specification of organisms where cell gene expression alters due to the influence of other cells,an self-organizing process of bio-inspired electronic array is abstracted as modification process of configuration information on the the function and connection of each cell.After that,membrane computing and population P systems are introduced to the self-organizing process.Based on population P systems,a self-organizing model and the procedure of bio-inspired electronic array are established,and an online self-organizing process can be implemented.(2)A new self-organizing method of bio-inspired electronic array is proposed,which can optimize the placement of cells.In the online self-organizing process of bio-inspired electronic array,the placement of cells cannot be optimized,which easily causes blocking of communication network and increases the computa tional time of realizing target circuit logical function by array.To solve this problem,a bio-inspired electronic array self-organizing method based on optimization of cells placement and population P systems is proposed.The method utilizes the metric space to model the function diagram of target circuit and the structure of bio-inspired electronic array.Then cell placement model is established by mapping the functional diagram to the array structure.An improved genetic algorithm is used to solve the p lacement model,and cell placement optimization is obtained.Based on this,the self-organizing method of bio-inspired electronic array in population P systems is used to realize self-organizing of array.(3)A new self-repairing method of bio-inspired electronic array is studied.The self-repairing method based on cell elimination,which only utilizes the same line of cell for self-repairing,has limited repair times and complicated routing during array reconstruction.To solve this problem,a reconstruct ive self-repairing method based on population P systems and communication x-machine is proposed.According to the change of cell function and connection during self-repairing process,self-repairing rules are designed based on dynamic cell population P sys tems.A communication X-machine model is built to describe the change process of internal condition of cell during self-repairing process.On this basis,a reconstructive self-repairing model and a modification method of configuration information for bio-inspired electronic array are established.This self-repairing approach can use any backup cells of array for repair,and other working cells do not need to be rerouted in the self-repairing process.(4)Structural optimization design and experimental demonstration of bio-inspired electronic array are conducted.The communication structure of conventional bio-inspired electronic array has limited communication mode and low data rate,which cannot efficiently support the process of self-organizing and self-repairing.To solve this problem,a kind of bio-inspired electronic array structure with full connection capability is constructed by mimicking the communication mode of biological cell.Then the structural design is implemented on the basis of ML605 platfor m of Xilinx Company and a multi-axis synchronous controller with self-repairing capability is constructed.Tests are carried out on the self-organizing and self-repairing method,and test results indicate that the structure has good communication capabilit y and can effectively support array self-organizing and self-repairing process.