Toyota Motor Engineering & Manufacturing North America, Inc.

University of California

Université Joseph Fourier

Xiaoqing Jin

Jyotirmoy Vinay Deshmukh

James P Kapinski

Luan V Nguyen

Shigeki Hasegawa

Jared Michael Farnsworth

Thao Dang

Tommaso Dreossi

Alexandre Donze

Sanjit A Seshia

Systems and methods are provided for monitoring time-series data relative to a temporal logic specification regarding expected behavior of a system, such as a vehicle. The time-series data and a threshold value(s) specified in the temporal logic specification may be encrypted and analyzed without decrypting the time-series data to maintain the privacy of a user(s) of the vehicle. Encryption of the time-series data and the threshold value(s) may be accomplished using an order preserving encryption scheme. Analysis of the time-series data may be accomplished utilizing a batch processing-type architecture or a continuous processing-type architecture. When utilizing the continuous processing-type architecture, historical time-series data may be stored and utilized to determine whether currently-monitored time-series data satisfies the temporal logic specification.

Privacy-aware signal monitoring systems and methods

A system for determining desired control paths for controlling operation of a fuel cell circuit includes a memory to store a model of the fuel cell circuit and an input device to receive system requirements. The system also includes a model processor designed to select sets of time-series actuator states corresponding to time-series control of an actuator of the fuel cell circuit and to perform simulations of the model using the multiple sets of time-series actuator states as controls for the actuator. The model processor is also performs an analysis of results of the simulations to determine whether the results for each of the multiple sets of time-series actuator states satisfy the system requirements and how far the results are from the system requirements, and selects a final set of time-series actuator states that satisfy the system requirements based on the analysis.

STL actuation-path planning

Systems and methods for evaluating closed-loop control systems are disclosed. In one embodiment, a method of evaluating a control system includes determining, using a processing device, one or more convergence classifier functions from a closed-loop model, wherein the one or more convergence classifier functions convey convergent behavior of the closed-loop model over a pre-determined period of time. The method further includes generating, using the processing device, a plurality of test cases of an input space of the closed-loop model under evaluation, and determining, using the processing device, whether one or more individual test cases of the plurality of test cases do not satisfy the one or more convergence classifier functions.

Systems and methods for testing convergence of closed-loop control systems

A computer-implemented method for automatically identifying a faulty behavior of a control system. The method includes receiving, at a test processor, a description of the faulty behavior. The method also includes selecting, using the test processor, a goal state based on a heuristic decision. The method also includes selecting, using the test processor, a selected system state. The method also includes selecting, using the test processor, a selected variable to the control system based on the goal state. The method also includes loading, from a memory, a control model of the control system. The method also includes performing, using the test processor, a simulation of the control model using the selected variable and the selected system state as parameters of the simulation. The method also includes determining, using the test processor, whether the faulty behavior was observed based on the simulation.

Coverage guided technique for bug finding in control systems and software

Systems and methods for mining a temporal requirement from a block diagram model of a closed loop control system are disclosed. One embodiment of a method includes simulating the closed loop control system of a vehicle to obtain simulation traces and determining a candidate requirement by instantiating a template requirement with values of the simulation traces to locate parameter values that suggest that the template requirement is fulfilled. Some embodiments of the method include determining whether a counterexample to the candidate requirement exists; and in response to determining that the counterexample to the candidate requirement exists, obtaining the counterexample to the candidate requirement and adding the counterexample to the simulation traces for inspection.

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Torrance, CA, United States of America

Xiaoqing Jin