| The project described in this thesis is a part of the fund project "principles and experiments study of the process equipment complex systems fault self-cure regulation and control"(serial number o f the project:50375014). The s elected thesis focuses mainly around the principles and experiment of auto-balancing for rotating machinery and engineering applications electromagnetic active balancing systems.Unbalance is a common fault of rotors for the smooth and continuous operation process equipment. Classical dynamic balance methods based on time-invariant system are put forward, however, rotating machinery rotors in real world are all non-linear and time-variant in a certain degree. So those techniques depend only on method of trial and error, obviously inefficient and low precision. If dynamic balance is automatic without stopping machinery, auto-balancing getting rid of those disadvantages, thus auto-balancing has a wide application prospect. For the purpose of the research and development of automatic balance system, the dissertation deals with the measuring method of the unbalance signal, the design of the auto-tuning adaptive control algorithm. The main content is as follow:(1) The state of the art and tendency of the auto-balancing technology are reviewed and the significance is discussed; (2) The dynamics principle and basic theory of dynamic balance. (3) Tracking filter and full period sampling hardware circuit of vibration signal are introduced, further, adaptive sampling algorithm is used to modify severe errors. At last, the calculation ofthe rotate velocity and the fast computing method of the unbalance are present. (4) Parameter auto tuning adaptive control of for 1-plane auto-balancing is bring forward. (5) Auto-balancing experiments are done and the performance and function of auto-balancing are analyzed. (6) An optimal balancing and measurable planes by multi-object optimization using PSI. is presented. (7) Auto-balancing system has a practical application. |
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