In dynamic viscoelastic measurement, accurate control of strain (or displacement) is one of the most important functions because the strain becomes dominant in viscoelasticity as it increases. However, it is difficult to achieve the accurate strain with commonly-used control methods when the specimen should be deformed largely. This is because the oscillation profile is distorted by the nonlinear viscoelastic response from the specimen and it produces the phase lag and gain loss in the control. In order to solve these problems, a viscoelastometer using a repetitive control was proposed in our previous work, and the applicability has been discussed in linear viscoelastic measurement. In this paper, we examine the applicability of proposed method to nonlinear viscoelastic measurement.
- Dynamic Systems and Control Division
Application of a Repetitively-Controlled Viscoelastometer to Large Deformation
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Nabae, H, & Higuchi, T. "Application of a Repetitively-Controlled Viscoelastometer to Large Deformation." Proceedings of the ASME 2012 5th Annual Dynamic Systems and Control Conference joint with the JSME 2012 11th Motion and Vibration Conference. Volume 3: Renewable Energy Systems; Robotics; Robust Control; Single Track Vehicle Dynamics and Control; Stochastic Models, Control and Algorithms in Robotics; Structure Dynamics and Smart Structures; Surgical Robotics; Tire and Suspension Systems Modeling; Vehicle Dynamics and Control; Vibration and Energy; Vibration Control. Fort Lauderdale, Florida, USA. October 17–19, 2012. pp. 733-738. ASME. https://doi.org/10.1115/DSCC2012-MOVIC2012-8568
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