A review on positioning uncertainty in motion control for machine tool feed drives

L Quan, W Zhao - Precision Engineering, 2024 - Elsevier
The feed system is a typical mechatronics system, as well as motion control equipment, that
serves as a fundamental component of CNC machine tools. Developing a precise …

Beyond performance of learning control subject to uncertainties and noise: A frequency-domain approach applied to wafer stages

F Song, N Cui, S Chen, K Zhang, Y Liu… - IEEE/CAA Journal of …, 2024 - ieeexplore.ieee.org
The increasingly stringent performance requirement in integrated circuit manufacturing,
characterized by smaller feature sizes and higher productivity, necessitates the wafer stage …

A Multistage Update Rule Framework for Iterative Learning Control Systems

Z Li, D Shen, X Yu - IEEE Transactions on Automation Science …, 2024 - ieeexplore.ieee.org
The proportional type update rule (PTUR) is the most widely used iterative learning control
(ILC) scheme. Recently, a fractional-power type update rule (FTUR) was proposed to …

[HTML][HTML] Reset-free data-driven gain estimation: Power iteration using reversed-circulant matrices

T Oomen, CR Rojas - Automatica, 2024 - Elsevier
A direct data-driven iterative algorithm is developed to accurately estimate the H∞ norm of a
linear time-invariant system from continuous operation, ie, without resetting the system. The …

Motion Control of Wafer Scanners in Lithography Systems: From Setpoint Generation to Multi-Stage Coordination

F Song, Y Liu, Y Dong, X Chen… - IEEE Transactions on …, 2024 - ieeexplore.ieee.org
Accurate pattern transfer, coupled with stringent requirements for throughput and quality in
lithography systems, necessitates the wafer scanner executing an aggressive motion with …

Algebraic Control: Complete Stable Inversion with Necessary and Sufficient Conditions

B Kürkçü, M Tomizuka - arXiv e-prints, 2024 - ui.adsabs.harvard.edu
Recent advances in learning-based control have increased interest in stable inversion to
meet growing performance demands. Here, we establish necessary and sufficient conditions …