Vibration Suppression Using Disturbance Observer for Systems with Periodic Disturbances and Input Saturations(Mechanical Systems)

publisherCopyright (c) 2009, 一般社団法人日本機械学会, rights: 本文データは学協会の許諾に基づきCiNiiから複製したものである, relation: isVersionOf: http://ci.nii.ac.jp/naid/110007113646/[Abstract] Noises and vibrations are often generated by periodic disturbances in compressors, pumps and so on. It is well known that vibration suppressing systems such as the repetitive control effectively suppress the periodic disturbances. However, there is no report about methods that can make control performance deterioration as small as possible when control inputs of the vibration suppression system are saturated. This paper designs a disturbance observer that effectively suppresses periodic disturbances. The proposed method can accurately estimate the disturbance if one of the following two conditions is satisfied. The one is that the control object is known, and the other is that the input is not saturated. The control object is assumed to be a linear system that may have time-delay element and handle multi-input and multi-output. The proposed system estimates disturbances using the structure of the disturbance observer. Some compressors system simulations are illustrated to verify the effectiveness of the method. The method is appropriate to rotational machine systems such as compressors and pumps in which the vibrations and noises should be avoided