The invention provides a biomimetic
machine shark, and relates to the field of biomimetic
underwater vehicles. The biomimetic
machine shark comprises a shark head, a pectoral fin
system, a
dorsal fin,a shark body framework, a device cabin and a shark
tail driving
system; the shark head is connected with the shark body framework through a head steering engine, and the head steering engine is fixedto the front part of the shark body framework and can control the shark head to swing left and right; the pectoral fin
system realizes floating upward and diving downward of the
machine shark duringmoving by changing the angles of pectoral fins; a
dorsal fin is fixed to the shark body framework, the device cabin is placed in the shark body framework, and the shark body framework is provided withthreaded holes to connect steering engines and other extending devices; a singlechip
microcomputer, batteries and the like are placed in the device cabin; and the shark
tail driving system realizes the condition that a main steering engine drives a whole
tail part to swing flexibly through traction of a linkage piece, and a caudal fin steering engine is arranged at a last caudal joint to controla caudal fin to swing individually. According to the biomimetic machine shark, the structure is simple, the biomimetic effect is vivid, the expansibility is high, and three-dimensional motion under water can be realized.