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🔍 ralf schindler 📂 Engineering
Showing 793 results for "ralf schindler" in Engineering
Engineering Preprint PDF DOI

Spectral Boundary Observer for Counter-Flow Heat Exchangers

Mohamed Camil Belhadjoudja, Mohamed Maghenem, Emmanuel Witrant · 2026

We consider a system of two coupled first-order linear hyperbolic partial differential equations modeling heat transport in a counter-flow heat exchanger: one equation describes the transport of a hot…

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Engineering Preprint PDF DOI

Exploiting Differential Flatness for Efficient Learning-based Model Predictive Control of Constrained Multi-Input Control Affine Systems

Tobias A. Farger, Adam W. Hall, Angela P. Schoellig · 2026

Learning-based control techniques use data from past trajectories to control systems with uncertain dynamics. However, learning-based controllers are often computationally inefficient, limiting their …

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Engineering Preprint PDF DOI

Learning from the Best: Smoothness-Driven Metrics for Data Quality in Imitation Learning

Soham Kulkarni, Raayan Dhar, Yuchen Cui · 2026

In behavioral cloning (BC), policy performance is fundamentally limited by demonstration data quality. Real-world datasets contain trajectories of varying quality due to operator skill differences, te…

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Engineering Preprint PDF DOI

Time-Localized Parametric Decomposition of Respiratory Airflow for Sub-Breath Analysis

Victoria Ribeiro Rodrigues, Paul W. Davenport, Nicholas J. Napoli · 2026

Respiratory airflow signals provide critical insight into breathing mechanics, yet conventional analysis methods remain limited in their ability to characterize the internal structure of individual br…

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Engineering Preprint PDF DOI

Estimation of Unknown Parameters in Presence of Perturbations and Noises with Application to GPEBO Design

Anton Glushchenko, Konstantin Lastochkin · 2026

A problem of online estimation of unknown parameters is considered for a linear regression equation, which is affected by an additive perturbation that can be caused by measurement noise (that corrupt…

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Engineering Preprint PDF DOI

Lightweight Low-SNR-Robust Semantic Communication System for Autonomous Driving

Ruixing Ren, Minjie Wei, Junhui Zhao · 2026

Image transmission for vehicle-to-vehicle collaborative perception in autonomous driving faces challenges including limited on-board terminal resources, time-varying wireless channel fading, and poor …

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Engineering Preprint PDF DOI

Strain in Sound: Soft Corrugated Tube for Local Strain Sensing with Acoustic Resonance

Michael Chun, Ananya Nukala, Tae Myung Huh · 2026

We present a soft corrugated tube sensor designed to estimate strain in each half segment. When air flows through the tube, the internal corrugated cavities induce pressure oscillations that excite th…

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Engineering Preprint PDF DOI

Scaling and Analytical Approximation of Porous Electrode Theory for Reaction-limited Batteries

Shakul Pathak, Martin Z. Bazant · 2026

Porous electrode theory (PET) provides essential insights into electrochemical states, but its computational complexity hinders real-time control and obscures scaling relations. To bridge the gap betw…

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Engineering Preprint PDF DOI

Momentum-constrained Hybrid Heuristic Trajectory Optimization Framework with Residual-enhanced DRL for Visually Impaired Scenarios

Yuting Zeng, Zhiwen Zheng, Jingya Wang, You Zhou, JiaLing Xiao, Yongbin Yu, Manping Fan, Bo Gong, Liyong Ren · 2026

Safe and efficient assistive planning for visually impaired scenarios remains challenging, since existing methods struggle with multi-objective optimization, generalization, and interpretability. In r…

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Engineering Preprint PDF DOI

Beam Squinting Effects in Super Wideband Communication Systems

Sachitha C. Bandara, Peter J. Smith, Erfan Khordad, Pawel Dmochowski, Robin Evans, Rajitha Senanayake · 2026

Beam squint, the frequency-dependent shift of the main beam, poses a major challenge for wideband antenna arrays. This paper focuses on the beam squint effects in super wideband (SW) systems, where hi…

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Engineering Preprint PDF DOI

RACF: A Resilient Autonomous Car Framework with Object Distance Correction

Chieh Tsai, Hossein Rastgoftar, Salim Hariri · 2026

Autonomous vehicles are increasingly deployed in safety-critical applications, where sensing failures or cyberphysical attacks can lead to unsafe operations resulting in human loss and/or severe physi…

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Engineering Preprint PDF DOI

Network-Assisted Full-Duplex Cell-Free Massive MIMO Systems Under Infeasible Circumstances

Trinh Van Chien, Bui Trong Duc, Mohammadali Mohammadi, Hien Quoc Ngo, Michail Matthaiou · 2026

Cell-free massive multiple-input multiple-output is a potential candidate for future networks with pervasive connectivity by utilizing coherent joint transmission and distributed antenna arrays. This …

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Engineering Preprint PDF DOI

Ring Mixing with Auxiliary Signal-to-Consistency-Error Ratio Loss for Unsupervised Denoising in Speech Separation

Matthew Maciejewski, Samuele Cornell · 2026

Noisy speech separation systems are typically trained on fully-synthetic mixtures, limiting generalization to real-world scenarios. Though training on mixtures of in-domain (thus often noisy) speech i…

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Engineering Preprint PDF DOI

From Cut-In to Rated: Multi-Region Floating Offshore Wind Farm Control for Secondary Frequency Regulation

Stephen Ampleman, Dennice F. Gayme · 2026

This paper describes a multi-region control framework for floating offshore wind farms. Specifically, we propose a novel generator torque controller that regulates rotor speed in Region 2, correspondi…

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Engineering Preprint PDF DOI

Surrogate Model-Based Near-Optimal Gain Selection for Approach-Angle-Constrained Two-Phase Pure Proportional Navigation

Abhigyan Roy, Shreeya Padte, Abel Viji George, Vivek A, Satadal Ghosh · 2026

In guidance literature, Pure Proportional Navigation (PPN) guidance is widely used for aerodynamically driven vehicles. A two-phase extension of PPN (2pPPN), which uses different navigation gains for …

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Engineering Preprint PDF DOI

End-to-end optimization of sparse ultrasound linear probes

Sergio Urrea, Adrian Basarab, Herve Liebgott, Henry Arguello · 2026

Ultrasound imaging faces a trade-off between image quality and hardware complexity caused by dense transducers. Sparse arrays are one popular solution to mitigate this challenge. This work proposes an…

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Engineering Preprint PDF DOI

Tiered Super-Moore's Law: Price Evolution, Production Frontiers, and Market Competition in Large Language Model Inference Services

Mingdeng Du · 2026

This paper provides the first systematic economic analysis of token pricing in the large language model (LLM) inference market. Assembling a novel dataset integrating OpenRouter API data (318 models),…

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Engineering Preprint PDF DOI

Enabling topography-resolving structural dynamic contact simulation

Hendrik D. Linder, David A. Najera-Flores, Robert J. Kuether, Malte Krack · 2026

Damping of structures and systems is often dominated by frictional dissipation in connections, the prediction of which remains a longstanding scientific challenge. Previous studies have shown that the…

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Engineering Preprint PDF DOI

A Low Cost Discrete Digital Isolator Circuit

Thomas Conway · 2026

This work presents a fully discrete, low cost digital isolator requiring no specialized ICs and implemented entirely with general purpose transistors and a two layer PCB embedded air core transformer.…

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Engineering Preprint PDF DOI

RAFL: Generalizable Sim-to-Real of Soft Robots with Residual Acceleration Field Learning

Dong Heon Cho, Boyuan Chen · 2026

Differentiable simulators enable gradient-based optimization of soft robots over material parameters, control, and morphology, but accurately modeling real systems remains challenging due to the sim-t…

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