Force Fluctuation Suppression by Additional Force Feedback in Force Control System with Vibrating Environment for Rotary Wear Test

摘要

This paper presents a force control system with reaction force feedback as a minor loop to suppress the forcefluctuation due to environmental vibration. In the field of tribology, contact force between materials is one of mosteffective factors on wear behavior. However, the contact force fluctuates under high-speed sliding in a wear test; thusthere is a problem that accurate conditions of wear transition can not be clarified. The force fluctuation is caused byvibration of a contact point of test materials and is amplified by resonance modes. To suppress the force fluctuationeffectively, the influence of these factors has to be attenuated simultaneously. In the control system, a minor feedbackloop of reaction force is inserted inside compensation of a disturbance observer. The proposed approach is validatedby numerical analyses and simulations.