Professor Andrey Pankov from Perm National Research Polytechnic University has developed a new aircraft blade that adapts its shape directly in flight, reduces fuel consumption and noise without heavy mechanical drives. The technology solves the problem of vibrations and resistance during acceleration, the Ministry of Education and Science of the Russian Federation said.
The scientist has developed piezo actuators with interdigitated electrodes. This scheme increases the deflection angle of the blade flap by 20% compared to analogues. The electric field between the "combs" enhances the deformation of the plate and allows more active control of the air flow.
The entire surface of the blade is covered with a network of piezoelectric cells. They are tightly joined, but differ in the direction of the electrodes.
When a control voltage is applied to the electrodes of the cells, each cell deforms in its own special way, causing the entire blade to bend and/or twist in the desired direction.
The development will simplify the design of screw systems, reduce weight and noise, and increase the fuel efficiency of airplanes and helicopters. The team is preparing a prototype and a test program.
