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| Multi-objective optimum control of intelligent parabolic antennas |
| Revised:December 11, 2003 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20056130 |
| KeyWord:intelligent structures,antennas,shape control,multi-objective optimization,RMS |
| SUI Yun-kang~* LONG Lian-chun |
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| Abstract: |
| Large-scale antennas should keep its shape prexisely. Since various load cases and every kind of stochastic interference,this kind of structure is fit for active control method for the purpose of keeping its shape.For intelligent parabolic antennas,a multi-objective optimum model is established,which takes the RMS(root-mean-square) of the light distant difference to the best-fit paraboloid of antennas and the energy consumed by actuators as multiple objective functions.The optimum model is constrained by strength of the structure and character of actuators.The objective functions are combined in one by two weighting factors and then quadratic approximation is taken for solving.Finally,the model is transformed to a sequential-quadratic-programming problem.Simulation of quasi-static shape control of intelligent parabolic antennas was carried out.Examples illustrate that the precise shape control of large-scale antennas can be realized by using fewer actuators.With the increase of the number of the actuators,the precision of the antennas can be very high and ultimately reaches to zero error theoretically. |
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