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A hyper-heuristic algorithm via proximal policy optimization for multi-objective truss problems
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DOI：10.1016/j.eswa.2024.124929.png)
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Abstract
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This paper proposes a hyper-heuristic evolutionary algorithm via proximal policy optimization, named HHEAPPO, for solving multi-objective truss optimization problems. HHEA-PPO has a two-layer structure: a highlevel strategy and low-level heuristics. The high-level strategy consists of proximal policy optimization, while the low-level heuristics consist of ten predefined heuristic operators. During the iteration process, the high-level strategy selects the most promising low-level heuristic according to the state of the individuals and the population. To maintain the convergence and distribution of the external Pareto archive, a dynamic crowding distance mechanism is employed. HHEA-PPO is applied to eight multi-objective truss optimization problems and compared with thirteen state-of-the-art optimization algorithms in terms of success rate, average computation duration, and average fitness evaluations to evaluate its performance. The results show that HHEA-PPO has higher search efficiency and greater stability, demonstrating its ability to solve large-scale engineering design problems.
Keywords:
Multi-objective optimization
Truss optimization
Proximal policy optimization
Hyper-heuristic algorithm
Dynamic crowding distance
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7.5
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2.9W
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10.2W
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