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91.发明授权公开(公告)号：US11262184B1
公开(公告)日：2022-03-01
申请号：US17082307
申请日：2020-10-28
发明人： David Millar , Celalettin Yurdakul , Pu Wang , Kieran Parsons
IPC分类号： G01B9/02 , G01B9/02091 , G01B9/02001
摘要： An optical coherence tomography (OCT) system for profilometry measurements of a specimen with a lateral resolution across the profilometry measurements is provided. The OCT system includes a line-field generator, an interferometer, and a spectrometer. The line-field generator includes a filter arranged in a focal plane of a lens for spatially filtering extended line-field light into a line-field light of a width equal to the lateral resolution. The interferometer is configured to interfere the line-field light reflected from the specimen illuminated with a line-shaped focus with a reference signal of the line-field light to produce an interference pattern. The spectrometer configured to analyze spectral components of the interference pattern in a digital domain to produce the profilometry measurements of the specimen.
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公开(公告)号：US11254315B2
公开(公告)日：2022-02-22
申请号：US16299285
申请日：2019-03-12
发明人： Karl Berntorp , Rien Quirynen , Stefano Di Cairano
IPC分类号： B60W40/068 , B60W30/18 , B60W30/02
摘要： A system control a vehicle using a friction function describing a friction between a type of surface of the road and a tire of the vehicle as a function of a slip of a wheel of the vehicle. The parameters of each friction function include an initial slope of the friction function defining a stiffness of the tire and one or combination of a peak friction, a shape factor and a curvature factor of the friction function. Upon estimating a slip and a stiffness of the tire, the system selects from the memory parameters of the friction function corresponding to the current stiffness of the tire, determines a control command using a value of the friction corresponding to the slip of the tire according to the friction function defined by the selected parameters, and submits the control command to an actuator of the vehicle.
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公开(公告)号：US20210403182A1
公开(公告)日：2021-12-30
申请号：US16914383
申请日：2020-06-28
摘要： A system for controlling an operation of a vehicle to rendezvous with a target over a finite time horizon, wherein the vehicle and the target form a multi-object celestial system. A processor to formulate passive unsafe regions as passive safety constraints. The passive unsafe regions represents regions of space around the target guaranteeing collision trajectories with the target, in an event of total thruster failure. Update a controller having a model of dynamics of the vehicle with received data, and subject the updated controller to the passive safety constraints to generate control commands that produce a collision free rendezvous trajectory which avoids unsafe regions for the specified time period, guaranteeing a collision free trajectory with respect to the target in the event of the total vehicle thruster failure, so the vehicle does not collide with the target. Output the control commands to activate or not activate thrusters of the vehicle.
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公开(公告)号：US20210402980A1
公开(公告)日：2021-12-30
申请号：US16913231
申请日：2020-06-26
IPC分类号： B60W30/00 , G05D1/02 , B60W40/107 , B60W40/068 , G01C21/34
摘要： A controller is provided for operating a system under admissible states. The controller includes an interface configured to connect the system storing a set of measured system states, a set of reference inputs and a set of system parameters in a storage arranged inside or outside the system, a memory storing measured system states, admissible reference inputs and admissible parameter sets and computer-executable programs including a parameter estimator and an adaptive reference governor (ARG), a processor, in connection with the memory. The processor is configured to perform the ARG and the parameter estimator. The parameter estimator extracts a pair of a reference input and the system state and compute a system parameter estimate based on the reference input and system state. The ARG is configured to update the reference input and compute a parameter-robust constraint admissible set based on the updated reference input and the system states, wherein the ARG generates and transmits a reference input to the system based on the parameter-robust constraint admissible set.
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公开(公告)号：US11204467B2
公开(公告)日：2021-12-21
申请号：US16804287
申请日：2020-02-28
摘要： A grating coupler having first and second ends for coupling a light beam to a waveguide of a chip includes a substrate configured to receive the light beam from the first end and transmit the light beam through the second end, the substrate having a first refractive index n1, a grating structure having curved grating lines arranged on the substrate, the grating structure having a second refractive index n1, wherein the curved grating lines have line width w and height d and are arranged by a pitch Λ, wherein the second refractive index n2 is less than first refractive index n1, and a cladding layer configured to cover the grating structure, wherein the cladding layer has a third refractive index n3.
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公开(公告)号：US11204317B2
公开(公告)日：2021-12-21
申请号：US16285344
申请日：2019-02-26
发明人： Hassan Mansour , Ajinkya Kadu , Petros Boufounos , Dehong Liu
IPC分类号： G06T11/00 , A61B8/13 , G01N23/046 , G01N21/47 , G01N21/17
摘要： A tomographic imaging system receives measurements at a set of frequencies of a wavefield scattered by an internal structure of an object, recursively reconstructs an image of the internal structure of the object until a termination condition is met, and renders the reconstructed image. For a current iteration, the system adds a frequency to a previous set of frequencies used during a previous iteration to produce a current set of frequencies, such that the added frequency is higher than any frequency in the previous set of frequencies, and reconstructs a current image of the internal structure of the object that minimizes a difference between a portion of the scattered wavefield measured at the current set of frequencies and a wavefield synthetized from the current image. A previous image determined during the previous iteration initializes the reconstruction of the current image.
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公开(公告)号：US20210375127A1
公开(公告)日：2021-12-02
申请号：US16889224
申请日：2020-06-01
发明人： Uros Kalabic , Piyush Grover , Schuchin Aeron
摘要： Embodiments disclose a system for traffic control. The system comprises a receiver configured to receive traffic information indicative of a state of a traffic; a processor configured to determine one or more control commands to control at least a subset of vehicles forming the state of the traffic by minimizing a multiscale normalization of a difference between a flow of one or more vehicles of the subset of vehicles forming the traffic and a uniform flow of the one or more vehicles; and a transmitter configured to transmit the one or more control commands to the subset of vehicles.
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公开(公告)号：US20210374843A1
公开(公告)日：2021-12-02
申请号：US16882845
申请日：2020-05-26
摘要： Disclosed a system and method of debt management in a distributed ledger system. The methods and systems provide for representing and assigning debt in the form of tokens in the distributed ledger. The debt tokens are implemented in a UTXO model by creating debt-only addresses that can send credit only with permission. The credit tokens are implemented based on UTXO model by requiring an input as well as an output specified for the credit transaction.
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公开(公告)号：US20210373513A1
公开(公告)日：2021-12-02
申请号：US16886825
申请日：2020-05-29
发明人： Rien Quirynen , Xuhui Feng , Stefano Di Cairano
摘要： A predictive controller controls a system under uncertainty subject to constraints on state and control variables of the system. At each control step, the predictive controller solves an inequality constrained nonlinear dynamic optimization problem including probabilistic chance constraints representing the uncertainty to produce a control command, and controls an operation of the system using the control command. The predictive controller solves the dynamic optimization problem based on a two-level optimization that alternates, until a termination condition is met, propagation of covariance matrices of the probabilistic chance constraints within the prediction horizon for fixed values of the state and control variables with optimization of the state and control variables within the prediction horizon for fixed values of the covariance matrices.
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公开(公告)号：US11166315B2
公开(公告)日：2021-11-02
申请号：US16676676
申请日：2019-11-07
发明人： Jianlin Guo , Philip Orlik , Yukimasa Nagai , Takenori Sumi
摘要： A wireless smart utility networks (Wi-SUN) device participating in a Wi-SUN network for coexistence with a Wi-Fi HaLow network sharing frequency spectra between the networks is disclosed. The Wi-SUN device includes a receiver to receive packets of neighbor Wi-SUN devices, a memory configured to store computer executable programs including a Hybrid carrier-sense multiple access (CSMA) control program and Wi-SUN Backoff control Program, a processor configured to execute the Hybrid CSMA control program, including instructions that cause the processor to perform steps of estimating a severity of Wi-Fi Halow interference based on a severity detection method, switching a backoff mode between predetermined backoff modes in response to the estimated severity, and performing a backoff procedure according to the selected backoff mode, and a transmitter to transmit packets.
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