document: A suggestion of fractional-order controller for flexible spacecraft attitude control A controller design method for flexible spacecraft attitude control is proposed . The system is first described by a partial differential equation with internal damping . Then the frequency response is analyzed , and the three basic characteristics of the flexible system , namely , average function , lower bound and upper bound are defined . On this basis , a fractional-order controller is proposed , which functions as phase stabilization control for lower frequency and smoothly enters to amplitude stabilization at higher frequency by proper amplitude attenuation . It is shown that the equivalent damping ratio increases in proportion to the square of frequency
doc_bio_tags: O O O O O O B I I I O O O O O B I I I O O O O O O O O O O B I I O B I O O O B I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B I I O O O O O O O B I O O O O O O O O O O O O O O B I O O O O O O O O
extractive_keyphrases: flexible spacecraft attitude control partial differential equation internal damping frequency response phase stabilization control amplitude stabilization damping ratio
abstractive_keyphrases: fractional-order controller