Sensing and Control under Constrained Information Feedback

Last updated on Apr 15, 2022
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Figure: e8 graph of the Gosset 421 polytope as a 2-dimensional skew orthogonal projection inside Petrie polygon, an emulation of the hand drawn original by Peter McMullen. Source: wikipedia and theoryofeverything.org

From irregular, asynchronous data to agile system response.

beyond-Nyquist research
Xu Chen
Xu Chen

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Publications

Robotic Target Following with Slow and Delayed Visual Feedback
This paper provides a control method for autonomously tracking moving targets with slow and delayed visual feedback. Such capabilities …
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Robotic Target Following with Slow and Delayed Visual Feedback
A Collaborative Sensing and Model-based Realtime Recovery of Fast Temporal Flows from Sparse Measurements
Temporal sensor management for sparse information retriveal.
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A Collaborative Sensing and Model-based Realtime Recovery of Fast Temporal Flows from Sparse Measurements
Following Fast-Dynamic Targets With Only Slow and Delayed Visual Feedback - a Kalman Filter and Model-Based Prediction Approach
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A Multirate Fractional-Order Repetitive Control for Laser-Aided Additive Manufacturing
This paper discusses fractional-order repetitive control (RC) to advance the quality of periodic energy deposition in laser-based …
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Model-based Sparse Information Recovery by Collaborative Sensor Management
This paper considers the real-time recovery of a fast discrete signal (e.g., updated every T seconds) by using sparsely sampled sensor …
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A Spectral Analysis and Its Implications of Feedback Regulation beyond Nyquist Frequency
Performance of controls beyond the Nyquist frequency.
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A Spectral Analysis and Its Implications of Feedback Regulation beyond Nyquist Frequency
Synthesis and Analysis of Multirate Repetitive Control for Fractional-order Periodic Disturbance Rejection in Powder Bed Fusion
This paper studies control approaches to advance the quality of repetitive energy deposition in powder bed fusion (PBF) additive …
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A Multirate Repetitive Control for Fractional-Order Servos in Laser-Based Additive Manufacturing
This paper studies repetitive control (RC) algorithms to advance the quality of repetitive energy deposition in laser-based additive …
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A Multirate Fractional-Order Repetitive Control for Laser-Aided Additive Manufacturing
This paper discusses fractional-order repetitive control (RC) to advance the quality of periodic energy deposition in laser-based …
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Rejecting Fast Narrow-Band Disturbances With Slow Sensor Feedback for Quality Beam Steering in Selective Laser Sintering
A fundamental problem arises in feedback control when the system is subject to fast disturbances but can only get slowly updated sensor …
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Multirate Forward-model Disturbance Observer for Feedback Regulation beyond Nyquist Frequency
A fundamental challenge in digital control arises when the controlled plant is subjected to a fast disturbance dynamics but is only …
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