A piezoelectrically driven wire feeding system for high performance wedge-wedge-bonding machines

Henke, Andreas; KüMMEL, Martin A.; Wallaschek, Jörg

doi:10.1016/s0957-4158(99)00025-2

Cited by 23 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For past few decades, piezoelectric type micro/nano positioners have revolutionized nano scale trajectory tracking in industrial applications like Scanning Probe Microscopy [1], semiconductor fabrication [2], micro robotics [3] and adaptive optics [4][5]amongst many others. The inherent high resolution of displacement, high stiffness, large blocking force and quick response characteristics have enabled piezo based manipulators supplant the traditional positioning systems.…”

Section: Introductionmentioning

confidence: 99%

Adaptive linearization of hysteresis for enhanced positional accuracy of robotic arm

Shome

Prakash

Pradhan

et al. 2014

2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)

View full text Add to dashboard Cite

Precision control of multi-axis piezo actuated micro / nanopositioning stages suffers not only from the inherent nonlinearities but also from parametric variations and uncertainties. In order to effectively implement any real-time control theory to mitigate the effects of nonlinearity, an adaptive mechanism to update the control system is a prerequisite. This paper investigates the effects of hysteretic nonlinearity in a second order Dahl model based piezoelectric manipulator. The plant performance is known to improve with injection of a suitable dose of noise called "dither". The concept of dither based control is interwoven with the conventional PID controller to introduce a novel adaptive dither control strategy. A double axis piezo stage is considered for controller design and validation. The controller performance is ascertained using three specific tests-a) Tracking Error Test, b) Multi-frequency, multi-amplitude tracking test and c) Two-axis Circular Contour Tracking Test.Results show an enhanced positioning accuracy of the manipulator in the presence of proposed control scheme than without it. The proposed control transpires as an effective control to improve tracking accuracy and resist external disturbances.

show abstract