For the problem of unbalanced vibration of aero-engine during operation

the auto-balancing technology was used to provide online compensation quality and reduce the vibration effectively. At present

the auto-balancing technology on aero-engines had problems and challenges in three aspects: structure

control algorithm and engineering application. The electromagnetically driven auto-balancer based on the influence coefficient algorithm was applied in the US C-130H transport aircraft. The test results from the four aero-engines in the flight showed that with auto-balancer

the propeller was balanced to below 1.27mm/s

94% reduction. Meanwhile 75% reduction in propeller-induced vibration was measured at the compressor.Research indicates that aero-engine auto-balancing technology can achieve continuous online dynamic balancing

which will greatly reduce the vibration fatigue damage of the aero-engine and its components，reduce the maintenance cost and prolong the maintenance cycle. Auto-balancing technology requires a gradual process for the aero-engine applications. In order to achieve this goal

it is necessary to carry out the research work of structure design

control strategy

system integration and so on. At the same time

it is necessary to take the auto-balancing structure into account at the very beginning of the aero-engines design.