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How to avoid premature convergence and maintain diversity of Pareto-optimal solutions for multi-objective optimization problems is addressed. An improved non-dominated sorting genetic algorithm is put forward, in which Gray and real codes are used for crossover and mutation operations, respectively, and chaotic variables are applied to produce initial population and control the crossover/mutation...
Ultrasonic crosstalk is one of the main causes of false distance measurements that reduce the work efficiency of sonar sensors in mobile robots. To enhance the real-time performance of sonar systems, chaotic pulse position-width modulation (CPPWM) sequences are proposed to construct short digital transmission sequences to trigger ultrasonic transducers. Thanks to their properties of sharp autocorrelation...
An improved ant colony algorithm (ACA) is put forward to solve the mobile robot odor localization (MROL) problem. The so-called MROL means localizing an odor source with mobile robots. The improved algorithm is realized through three phases, which are genetic algorithm (GA) based local search, global search and pheromone update. The GA ensures that the optimal or sub-optimal points can be found within...
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