Search Results for author: Janos Sztipanovits

Found 9 papers, 4 papers with code

Sample-Efficient and Surrogate-Based Design Optimization of Underwater Vehicle Hulls

no code implementations24 Apr 2023 Harsh Vardhan, David Hyde, Umesh Timalsina, Peter Volgyesi, Janos Sztipanovits

In this work, we leverage recent advances in optimization and artificial intelligence (AI) to explore both of these potential approaches, in the context of designing an optimal unmanned underwater vehicle (UUV) hull.

Bayesian Optimization

Fusion of ML with numerical simulation for optimized propeller design

no code implementations28 Feb 2023 Harsh Vardhan, Peter Volgyesi, Janos Sztipanovits

In this work, we propose an alternative way to use ML model to surrogate the design process that formulates the search problem as an inverse problem and can save time by finding the optimal design or at least a good initial seed design for optimization.

Search for universal minimum drag resistance underwater vehicle hull using CFD

no code implementations18 Feb 2023 Harsh Vardhan, Janos Sztipanovits

However, a design that is optimal at high velocity and high turbulence conditions performs near-optimal across many considered velocity and turbulence conditions.

Data efficient surrogate modeling for engineering design: Ensemble-free batch mode deep active learning for regression

1 code implementation16 Nov 2022 Harsh Vardhan, Umesh Timalsina, Peter Volgyesi, Janos Sztipanovits

In a computer-aided engineering design optimization problem that involves notoriously complex and time-consuming simulator, the prevalent approach is to replace these simulations with a data-driven surrogate that approximates the simulator's behavior at a much cheaper cost.

Active Learning

Deep Active Learning for Regression Using $ε$-weighted Hybrid Query Strategy

1 code implementation24 Jun 2022 Harsh Vardhan, Janos Sztipanovits

However, the main challenge in creating a DL-based surrogate is to simulate/label a large number of design points, which is time-consuming for computationally costly and/or high-dimensional engineering problems.

Active Learning regression

Reduced Robust Random Cut Forest for Out-Of-Distribution detection in machine learning models

no code implementations18 Jun 2022 Harsh Vardhan, Janos Sztipanovits

In this paper, we introduce a novel approach for this detection process using a Reduced Robust Random Cut Forest (RRRCF) data structure, which can be used on both small and large data sets.

Out-of-Distribution Detection

Rare event failure test case generation in Learning-Enabled-Controllers

1 code implementation11 Jun 2022 Harsh Vardhan, Janos Sztipanovits

Finding a good test case that can reveal the potential failure in these trained systems can help to retrain these models to increase their correctness.

Deep Learning-based Finite Element Analysis (FEA) surrogate for sub-sea pressure vessel

no code implementations6 Jun 2022 Harsh Vardhan, Janos Sztipanovits

Once the surrogate is trained for a class of problem, then the learned response surface can be used to analyze the stress effect without running the FEA for that class of problem.

regression

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