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Andrew Clark

6 accepted papers

2024

Fault Tolerant Neural Control Barrier Functions for Robotic Systems under Sensor Faults and Attacks

ICRA 2024poster

Safety is a fundamental requirement of many robotic systems. Control barrier function (CBF)-based approaches have been proposed to guarantee the safety of robotic systems. However, the effectiveness of these approaches highly relies on the choice of CBFs. Inspired by the universal approximation powe…

Cited by 2SourcecodeScholar
2024

SEEV: Synthesis with Efficient Exact Verification for ReLU Neural Barrier Functions

NeurIPS 2024poster

Neural Control Barrier Functions (NCBFs) have shown significant promise in enforcing safety constraints on nonlinear autonomous systems. State-of-the-art exact approaches to verifying safety of NCBF-based controllers exploit the piecewise-linear structure of ReLU neural networks, however, such appro…

2023

Exact Verification of ReLU Neural Control Barrier Functions

NeurIPS 2023poster

Control Barrier Functions (CBFs) are a popular approach for safe control of nonlinear systems. In CBF-based control, the desired safety properties of the system are mapped to nonnegativity of a CBF, and the control input is chosen to ensure that the CBF remains nonnegative for all time. Recently, ma…

2023

Learning Dissemination Strategies for External Sources in Opinion Dynamic Models with Cognitive Biases

IJCAI 2023poster

The opinions of members of a population are influenced by opinions of their peers, their own predispositions, and information from external sources via one or more information channels (e.g., news, social media). Due to individual cognitive biases, the perceptual impact of and importance assigned by…

Cited by 0SourcePDFScholar
2023

Neural Lyapunov Control for Discrete-Time Systems

NeurIPS 2023poster

While ensuring stability for linear systems is well understood, it remains a major challenge for nonlinear systems. A general approach in such cases is to compute a combination of a Lyapunov function and an associated control policy. However, finding Lyapunov functions for general nonlinear systems…

2021

Model-based Reinforcement Learning with Provable Safety Guarantees via Control Barrier Functions

ICRA 2021poster

Safety is a critical property in applications including robotics, transportation, and energy. Safety is especially challenging in reinforcement learning (RL) settings, in which uncertainty of the system dynamics may cause safety violations during exploration. Control Barrier Functions (CBFs), which…

Cited by 10SourceScholar