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Full-Text Articles in Engineering
A Particle Swarm Optimization-Like Algorithm For Constrained Minimal Spanning Tree Problems, Chun-Chao Yeh, Ying-Che Chien
A Particle Swarm Optimization-Like Algorithm For Constrained Minimal Spanning Tree Problems, Chun-Chao Yeh, Ying-Che Chien
Journal of Marine Science and Technology
Previous studies have discussed various constrained minimal spanning tree (MST) problems. In this paper, we propose an efficient algorithm for solving a class of constrained MST problems. The proposed PSO (Particle Swarm Optimization)- like strategy for solving constrained MST problems identifies optimal MSTs under degree and delay constraints. The solution quality and computation time of the proposed PLCMST (PSO-Like algorithm for Constrained MST problems) algorithm is compared with two other algorithms: one based on ant colony optimization, and the other based on a genetic algorithm strategy. Our experimental results show that the PLCMST outperforms the other two approaches, particularly when …
Shape Optimization Of Multi-Chamber Side Inlet/Outlet Mufflers Hybridized With Multiple Perforated Intruding Tubes Using A Genetic Algorithm, Min-Chie Chiu, Ying-Chun Chang
Shape Optimization Of Multi-Chamber Side Inlet/Outlet Mufflers Hybridized With Multiple Perforated Intruding Tubes Using A Genetic Algorithm, Min-Chie Chiu, Ying-Chun Chang
Journal of Marine Science and Technology
The use of perforated-tube side mufflers for depressing venting noise within a constrained space has been prevalent in modern industries. Also, research on mufflers equipped with side inlets/outlets has been thoroughly documented. However, research on shape optimization of side inlet/outlet mufflers hybridized with multiple open-ended perforated intruding tubes which may enhance acoustic performance has gone unnoticed. Therefore, we wish to not only analyze the sound transmission loss (STL) of side inlet/outlet mufflers but also to optimize their best design shape within a limited space. In this paper, the generalized decoupling technique and the plane wave theory used in solving the …
Design And Realization Of A Hybrid Intelligent Controller For A Twin Rotor Mimo System, Jih-Gau Juang, Kai-Ti Tu
Design And Realization Of A Hybrid Intelligent Controller For A Twin Rotor Mimo System, Jih-Gau Juang, Kai-Ti Tu
Journal of Marine Science and Technology
An intelligent control scheme using a fuzzy switching mechanism, grey prediction and genetic algorithm (GA) is applied to a coupled nonlinear system, called a twin rotor multi-input multi-output system (TRMS). In real-time control, a Xilinx Spartan II SP200 FPGA (Field Programmable Gate Array) is employed to construct a hardware-in-the-loop system through writing VHDL on this FPGA. The objective is to stabilize the TRMS in significant cross-coupled conditions, and to experiment with setpoint control and trajectory tracking. The proposed scheme improves the performance of the PID controller. Control gains and parameters of the fuzzy switching mechanism are obtained by GA. Simulation …