Search Results for author: Hans Butler

Found 13 papers, 0 papers with code

Physics-guided neural networks for inversion-based feedforward control applied to hybrid stepper motors

no code implementations22 Jun 2023 Daiwei Fan, Max Bolderman, Sjirk Koekebakker, Hans Butler, Mircea Lazar

Rotary motors, such as hybrid stepper motors (HSMs), are widely used in industries varying from printing applications to robotics.

Exploring the use of deep learning in task-flexible ILC

no code implementations25 Mar 2023 Anantha Sai Hariharan Vinjarapu, Yorick Broens, Hans Butler, Roland Tóth

To benchmark the performance of the proposed approach, a simulation study is presented which compares the TAIL-ILC to classical model-based feedforward strategies and existing learning-based approaches, such as neural network based feedforward learning.

Imitation Learning

On Improved Commutation for Moving-Magnet Planar Actuators

no code implementations25 Mar 2023 Yorick Broens, Hans Butler, Roland Tóth

The demand for high-precision and high-throughput motion control systems has increased significantly in recent years.

Position

Data-driven feedforward control design for nonlinear systems: A control-oriented system identification approach

no code implementations20 Mar 2023 Max Bolderman, Mircea Lazar, Hans Butler

To achieve this, we present a model of the system in a lifted space of trajectories, based on which we derive an upperbound on the reference tracking performance.

Physics-guided neural networks for feedforward control with input-to-state stability guarantees

no code implementations20 Jan 2023 Max Bolderman, Hans Butler, Sjirk Koekebakker, Eelco van Horssen, Ramidin Kamidi, Theresa Spaan-Burke, Nard Strijbosch, Mircea Lazar

The increasing demand on precision and throughput within high-precision mechatronics industries requires a new generation of feedforward controllers with higher accuracy than existing, physics-based feedforward controllers.

Friction

On modal observers for beyond rigid body $H_\infty$ control in high-precision mechatronics

no code implementations14 Sep 2022 Yorick Broens, Hans Butler, Roland Tóth

The ever increasing need for performance results in increasingly rigorous demands on throughput and positioning accuracy of high-precision motion systems, which often suffer from position dependent effects that originate from relative actuation and sensing of the moving-body.

Position

Physics-guided neural networks for feedforward control: From consistent identification to feedforward controller design

no code implementations1 Apr 2022 Max Bolderman, Mircea Lazar, Hans Butler

However, direct identification of the inverse dynamics is sensitive to noise that is present in the training data, and thereby results in biased parameter estimates which limit the achievable tracking performance.

LPV sequential loop closing for high-precision motion systems

no code implementations15 Mar 2022 Yorick Broens, Hans Butler, Roland Tóth

Increasingly stringent throughput requirements in the industry necessitate the need for lightweight design of high-precision motion systems to allow for high accelerations, while still achieving accurate positioning of the moving-body.

Position Vocal Bursts Intensity Prediction

On discretization of continuous-time LPV control solutions

no code implementations4 Feb 2022 Yorick Broens, Hans Butler, Roland Tóth

However, the main complication of CT synthesis approaches is the successive implementation of the resulting CT control solutions on physical hardware.

On feedforward control using physics-guided neural networks: Training cost regularization and optimized initialization

no code implementations28 Jan 2022 Max Bolderman, Mircea Lazar, Hans Butler

Performance of model-based feedforward controllers is typically limited by the accuracy of the inverse system dynamics model.

Physics-Guided Neural Networks for Inversion-based Feedforward Control applied to Linear Motors

no code implementations10 Mar 2021 Max Bolderman, Mircea Lazar, Hans Butler

Ever-increasing throughput specifications in semiconductor manufacturing require operating high-precision mechatronics, such as linear motors, at higher accelerations.

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