Abstract: The shape precision control of the large diameter and high precision mesh shape antenna reflector in the orbit has become one of the major developing trends of modern space techniques. In this paper, a new way for the optimal placements of the actuator in the shape precision control intelligent structures of the mesh shape antenna reflector with the characteristics of large size and flexiblility is used: mode analysis technology is applied to optimize placements of the actuator. The modal importance factor is defined, and then by weighting the candidate active members strain energy in each mode by the corresponding modal importance factors, the criterion TC of optimal placements of the acturator is obtained. The results of simulation shows that the control method is very effective.

Key words: intelligent structures, optimal placements of actuator, criterion TC, mesh shape antenna reflector, shape precision control