Researchers at the University of Southern California have developed a new miniature bee machine with four wings

Researchers at the University of Southern California (USC) are committed to solving the last problem of miniature insect robots, namely stability, and they once again draw inspiration from the insect world. A research team from the University of Southern California said that in order to increase yaw control, a bee robot does need four wings, just like a real insect, but this may increase the weight of the robot. The drive on the robot has accounted for 50 mg of the total 80 mg, plus two wings will make the miniature bee robot too heavy to fly.

Therefore, the University of Southern California team made lighter and better actuators. The previous robot used a dual-chip driver, consisting of three layers. The two outer piezoelectric layers alternately contract with a signal, thereby bending the inner layer back and forth to flap like insect wings. In contrast, the USC team created a single deformation drive. They use only one piece of piezoelectric material, which moves the passive layer back and forth. The resulting improvement in flight control means that current bee robots can travel along paths and avoid obstacles. And because these unimorph actuators are simpler, their manufacturing costs are also lower.

The single-transformer drive developed by the USC team is half the weight of the dual-drive, which means that even with four 33-mm (1.3-inch) wings, the new bee robot weighs only 95 mg (0.0033 oz). Moreover, because the load of the entire robot is distributed on four wings instead of two wings, the durability and life expectancy of the new bee robot is expected to be much longer than the previous two-wing robot.

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