Comparison and Evaluation of Algorithms for LiDAR-Based Contour Estimation in Integrated Vehicle Safety

Mothershed, David; Lugner, Robert; Afraj, Shahabaz; Sequeira, Gerald Joy; Schneider, Kilian; Brandmeier, Thomas; Soloiu, Valentin

doi:10.1109/tits.2020.3044753

Cited by 3 publications

(2 citation statements)

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“…There is a range of mathematical techniques that can be used to quantify the similarities between two curves, as illustrated in [18]. But, there are some specific considerations for the reward function in the current scenario.…”

Section: Reward Functionmentioning

confidence: 99%

“…Fréchet distance is computed using Eq. ( 9) where F (Q, P ) is the Fréchet distance of two curves Q (estimated signal), and P (reference signal), q and p are reparameterizations of Q and P to be continuous and non-decreasing, t could be thought of as the 'time' variable that only allows forward propagation along the curves, and d is the distance function of the metric space S [18]. The DFD, which is used in the modeling of the reward function is computed as illustrated by [19] using the following equations:…”

Section: Reward Functionmentioning

confidence: 99%

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Vehicle Crash Simulation Models for Reinforcement Learning driven crash-detection algorithm calibration

Afraj

Vaculı́n

Bohmlander

et al. 2023

Preprint

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The development of finite element vehicle models for crash simulations is a highly complex task. The main aim of these models is to simulate a variety of crash scenarios and assess all the safety systems for their respective performances. These vehicle models possess a substantial amount of data pertaining to the vehicle's geometry, structure, materials, etc., and are used to estimate a large set of system and component level characteristics using crash simulations. It is understood that even the most well-developed simulation models are prone to deviations in estimation when compared to real-world physical test results. This is generally due to our inability to model the chaos and uncertainties introduced in the real world. Such unavoidable deviations render the use of virtual simulations ineffective for the calibration process of the algorithms that activate the restraint systems in the event of a crash (crash-detection algorithm). In the scope of this research, authors hypothesize the possibility of accounting for such variations introduced in the real world by creating a feedback loop between real-world crash tests and crash simulations. To accomplish this, a Reinforcement Learning (RL) compatible virtual surrogate model is used, which is adapted from crash simulation models. Hence, a conceptual methodology is illustrated in this paper for developing an RL-compatible model that can be trained using the results of crash simulations and crash tests. As the calibration of the crash-detection algorithm is fundamentally dependent upon the crash pulses, the scope of the expected output is limited to advancing the ability to estimate crash pulses. Furthermore, the real-time implementation of the methodology is illustrated using an actual vehicle model.

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Section: Reward Functionmentioning

confidence: 99%

Section: Reward Functionmentioning

confidence: 99%