In-plane-control-based active vibration control method for wrinkled film

Abstract

The invention relates to an in-plane-control-based active vibration control method for a wrinkled film. On the basis of the analysis on the influence on dynamic characteristics of a film structure bya wrinkle form, a dynamic model of a wrinkled film is established; according to a modal superposition method, a space vector based on a natural mode of vibration is obtained and dynamic models of thewrinkled film under different loads are established; condensation polymerization is carried out on the dynamic models according to contributions to system vibration deformation by all orders of modes,so that a control-oriented film structural dynamic model is established; and with a model reference adaptive controller, a PID-MRAC control method based on in-plane-control multi-model switching is proposed. According to the method provided by the invention, no actuator needs to be pasted on the surface of the film; the out-of-plane vibration of the film is suppressed effectively; the characteristics of the film are not affected; the high stability of the film structure is ensured; and compared with the conventional PID control method, the in-plane-control-based active vibration control method enables the vibration time to be shortened by about 39.7%.

Description

technical field [0001] The invention belongs to the technical field of control engineering, and in particular relates to an active vibration control method of a wrinkled membrane based on in-plane regulation, which is used for simpler and more effective suppression of membrane vibration. Background technique [0002] The appearance of wrinkles significantly reduces the surface accuracy of the membrane, and also has a certain impact on the dynamic characteristics of the membrane structure. In the space environment without air damping, once the membrane structure is disturbed by the outside, the vibration of the membrane surface will be difficult to stop. The flexibility characteristics bring certain difficulties to ensure the stability and controllability on the orbit, so the regulation of the wrinkled film is facing severe challenges. Scholars at home and abroad have carried out research. At present, there are mainly two types of dynamic regulation methods. [0003] One is ...

AI Technical Summary

Problems solved by technology

Not only is wiring and installation difficult, but directly pasting the actuator on the surface of the film will also change the stress distribution of the film and affect the dynamic performance of the structure

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