Double-Layer Evolvable Hardware Method

One of the bottlenecks in traditional evolvable hardware is that the fitness evaluation process is restricted by the performance of the reconfigurable hardware, so that the overall evolution efficiency is very low. In order to solve the problem we propose a double-layer evolvable hardware method, which is composed of logical evolving layer and physical evolving layer. The chromosome coding based on the logic operation unit is used in logical evolving, which can implement the rapid fitness evaluation process in computer without the FPGA and other hardware. Based on the result of logical evolving, the physical evolving uses classical evolving method to evolve the physical characters of target circuit. Thus, the efficiency and the popularity of the evolvable hardware can both be improved.