Advancements and Analysis in High-Speed Underwater Bionic Robofish Research

Fish capable of high-speed movement have many morphological adaptation characteristics related to improving swimming performance, which are of great reference significance for the development of high-speed bionic robotic fish. However, in previous studies, there have been relatively few discussions on the morphological effects of fish bodies.This study investigates how the morphological characteristics of fast-swimming fish inspire the design of high-speed bionic robotic fish and identifies key factors for enhancing their swimming performance. By reviewing typical swimming patterns and associated morphological features, it summarizes that fast-swimming species commonly exhibit streamlined body shapes and efficient propulsion mechanisms. Current progress in hydrodynamic optimization and motion control of high-speed bionic robotic fish is systematically analyzed, with an evaluation of the relationships among propulsion modes, mechanical structures, and swimming performance. Results show that several prototypes have achieved swimming speeds of 1 m/s or higher, with the fastest reaching 3.7 m/s, and have been deployed in various practical scenarios. Nonetheless, limitations persist in propulsion efficiency, maneuverability, and energy consumption. Critical technical challenges—including lightweight structural design, autonomous control, and coordinated propulsion dynamics—are discussed. Finally, future development directions and application prospects are proposed to provide theoretical and technical guidance for the advancement of next-generation high-speed bionic robotic fish.