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Active Vibration Control of Nonlinear 2DOF Mechanical Systems via IDA-PBC
Sheng HAO Yuh YAMASHITA Koichi KOBAYASHI
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2020/09/01
Online ISSN: 1745-1337
Type of Manuscript: Special Section PAPER (Special Section on Circuits and Systems)
nonlinear control, vibration measurement, sensors,
Full Text: FreePDF
This paper proposes an active vibration-suppression control method for the systems with multiple disturbances using only the relative displacements and velocities. The controller can suppress the vibration of the main body in the world coordinate, where a velocity disturbance and a force disturbance affect the system simultaneously. The added device plays a similar role as an accelerometer, but we avoid the algebraic loop. The main idea of the feedback law is to convert a nonlinear system into an aseismatic desired system by using the energy shaping technique. A parameter selection procedure is derived by combining the constraints of nonlinear IDA-PBC and the evaluation of the control performance of the linearly approximated system. The effectiveness of the proposed method is confirmed by simulations for an example.