Trajectory generation using temporal logic and tree search

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United States of America Patent

PATENT NO 11360477
APP PUB NO 20200387158A1
SERIAL NO

16908389

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Abstract

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Techniques for determining a trajectory for an autonomous vehicle are described herein. In general, determining a route can include utilizing a search algorithm such as Monte Carlo Tree Search (MCTS) to search for possible trajectories, while using temporal logic formulas, such as Linear Temporal Logic (LTL), to validate or reject the possible trajectories. Trajectories can be selected based on various costs and constraints optimized for performance. Determining a trajectory can include determining a current state of the autonomous vehicle, which can include determining static and dynamic symbols in an environment. A context of an environment can be populated with the symbols, features, predicates, and LTL formula. Rabin automata can be based on the LTL formula, and the automata can be used to evaluate various candidate trajectories. Nodes of the MCTS can be generated and actions can be explored based on machine learning implemented as, for example, a deep neural network.

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Patent Owner(s)

Patent OwnerAddress
ZOOX INC1149 CHESS DRIVE FOSTER CITY CA 94404

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Askeland, Jacob Lee San Jose, US 22 315
Caldwell, Timothy Mountain View, US 38 509
Kiiski, Joona Markus Petteri Cupertino, US 11 141
Kobilarov, Marin Mountain View, US 49 463
Paxton, Christopher Mountain View, US 4 121
Raman, Vasumathi San Francisco, US 8 187
Somers, Robert Edward Sunnyvale, US 17 479

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