Research On The Algorithm Of Dynamic Balance For Aeropropellers

Because of the fuel economy in low flight speed, the propeller powered device is still widely served at aircraft in general and branch aviation field at present. As a highspeed rotating part, errors in manufacturing and assembling process make propeller certainly to vibrate in high-speed rotation. This vibration must be limited within an acceptable range. To do this work, it was with the assistant of a vibration tester and had to spend too much time to repeat the "measure-balance-test" process again and again. It was a work with much labor and poor effect in the traditional balancing algorithm. Based on this actual engineering issue, this paper gives a new dynamic balancing algorithm with an aim of achieving success at the first balancing trial. The main research contents and results are as follows.With reverse studying about the basic principle of how a certain vibration tester working in measuring and balancing and contacts with actual balancing practice, this paper describes where the errors from during balancing process of traditional algorithm. The difference between actual and ideal position for the count-weight installation on propeller hub brings much error in balancing procedure, at the same time, the vibration tester take an estimating size of the propeller wanted to be balanced also brings much error in calculating the quantity of count-weights.In order to reduce the amount of error in count-weight installation, this paper gives a vector decomposition algorithm to divide the count-weight into two parts on the both sides of the ideal installation position. About the error in calculating the quantity of count-weights, this paper gives another method of dynamic correction on the centroid positions of these counter weights and gets more accurate count-weight quantity information. With the combination of these algorithms, the accuracy of the balance is much improved, and it is proved by the engineering practice that success can be achieved in only one balancing trail.Based on these, a Win-form, Web-form and a Win CE platform programs were developed. With the multi-platform software, the new balancing algorithm is promoted and workers achieve success at the first balancing trail more easily.