Shape Control Of Inflatable Reflector After Heat Load With Dielectrice Lastomer Actuation

Because of a quantity of advantages of the space inflatable deployable antenna structure, such as large area when it is expanded, small volume when folded up, low cost when sent to the space and high reliability when depended in space, an increasing number of countries have launched an in-depth study on the space inflatable deployable antenna. Especially in recent years, with the rapid advancement of corresponding researches such as on-orbit antenna and space research in various countries, the light inflatable deployable antenna structure should be use urgently. Our country have a little research on this technology. In conclusion, it is very meaningful and valuable to carry on the research on the light space deployable structure.At present, there are few reports on the inflatable deployable antenna structure based on the profile accuracy of active control. When it is under the thermal loading, its deformation leads to the decrease of its accuracy which cannot meet our actual application requirements. If the problem that profile accuracy cannot meet the required needs when it is applied thermal loading is well solved, the inflatable deployable antenna structure can get further application in engineering. In this paper, we use the active control to increase its reflecting surface profile accuracy by using the single-layer dielectric elastomer actuators on the reflecting surface.In this paper,we made a single dielectric elastomer actuators, discussed the math model on the dielectric elastomer based on Mooney-Rivlin model and Neo-Hookean math model and analysis in the absence of dielectric elastomer tensile conditions driving stress with the change of the excitation voltage. The Mooney-Rivlin model is effective when the dielectric elastomer actuator structure be tensiled. We also get the answer that A1=19.4kPa,A2=1.25kPa. We also study the mathematical model and mechanical properties when the dielectric elastomer actuators no pre stretching.we get the answer that the drive force and electric field intensity is only related to their size and shape factors,and get the horizontal force and the vertical force has a same value.we also get that the dielectric elastomer actuators is very useful when the dielectric elastomer actuators no prestretching in tiny deformation control job.Finally, considering the reflector surface precision of reflector when the whole temperature changes and gradient temperature changeson orbit, and analysis of the reflection in the effective driving force on the surface of the reflector. We alsoconducted areflective surfacedynamicperformance analysis. Finally, the engineering model have be made andbe used in the experiment, compareing with the math experiment,we can get the similar answer,last the result is effencient to our future life.