Abstract: A method of fabricating a ceramic matrix composite material into a part, including applying a semi-permeable membrane over a stack of composite plies pre-impregnated with ceramic matrix. The semi-permeable membrane comprises a porous plastic material and may have a thickness of approximately 0.002 to 0.008 inches. The method may include compressing the semi-permeable membrane and the stack together and heating the semi-permeable membrane and the stack to cure the stack into the composite part. The semi-permeable membrane may be a porous plastic having pores large enough to allow volatile gasses to escape therethrough during curing but equal to or smaller than solid ceramic particles or clusters of the solid ceramic particles suspended in the ceramic matrix. The composite plies may contain approximately 35 percent to 45 percent of the ceramic matrix by weight relative to an overall weight of the stack of the composite plies pre-impregnated with the ceramic matrix.

Abstract: A brake control system of the present disclosure includes an accelerometer coupled to an axle. A brake control unit is configured to receive an axle acceleration signal indicative of an axle acceleration from the accelerometer, and decrease a braking command pressure in response to the axle acceleration being greater than a threshold acceleration value.

Abstract: A brake actuator system may comprise a brake actuator comprising a ball screw, a ball nut coupled to the ball screw, and a ram coupled to a ram end of the ball nut; a position sensor coupled to the brake actuator; a processor in electronic communication with the brake actuator and the position sensor; and a tangible, non-transitory memory configured to communicate with the processor, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by the processor, cause the processor to perform operations. The operations may comprise commanding the brake actuator to translate the ball nut in a first direction toward a brake stack; detecting the pusher reaching a furthest forward position; and commanding the brake actuator to translate the ball nut in a second direction opposite the first direction for a predetermined retraction distance.

Abstract: Disclosed are systems, methods, devices and non-transitory, computer-readable storage media for edge caching shared devices. In some implementations, a method comprises: receiving, by an edge cache server on a local area network (LAN) from a client device, a locate server request; determining, by the edge cache server, that the edge cache server has established server affinity with a user of the client device; sending, by the edge cache server to the client device, affinity data corresponding to the user; receiving, by the edge cache server from the client device, a request to transfer user data corresponding to the user; determining, by the edge cache server, that a new version of the user data is available; downloading, by the edge cache server, the new version of the user data; and sending, by the edge cache server to the client device, the new version of the user data.

Abstract: Embodiments of apparatuses, methods, and systems for scheduling tasks to hardware threads are described. In an embodiment, a processor includes a multiple hardware threads and a task manager. The task manager is to issue a task to a hardware thread. The task manager includes a hardware task queue to store a descriptor for the task. The descriptor is to include a field to store a value to indicate whether the task is a single task, a collection of iterative tasks, and a linked list of tasks.

Abstract: A brake control system of the present disclosure includes an accelerometer coupled to an axle. A brake control unit is configured to receive an axle acceleration signal indicative of an axle acceleration from the accelerometer, and decrease a braking command pressure in response to the axle acceleration being greater than a threshold acceleration value.

Abstract: A brake actuator system may comprise a brake actuator comprising a ball screw, a ball nut coupled to the ball screw, and a ram coupled to a ram end of the ball nut; a position sensor coupled to the brake actuator; a processor in electronic communication with the brake actuator and the position sensor; and a tangible, non-transitory memory configured to communicate with the processor, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by the processor, cause the processor to perform operations. The operations may comprise commanding the brake actuator to translate the ball nut in a first direction toward a brake stack; detecting the pusher reaching a furthest forward position; and commanding the brake actuator to translate the ball nut in a second direction opposite the first direction for a predetermined retraction distance.

Abstract: A brake actuator system may comprise a brake actuator comprising a ball screw, a ball nut coupled to the ball screw, and a ram coupled to a ram end of the ball nut; a position sensor coupled to the brake actuator; a processor in electronic communication with the brake actuator and the position sensor; and a tangible, non-transitory memory configured to communicate with the processor, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by the processor, cause the processor to perform operations. The operations may comprise commanding the brake actuator to translate the ball nut in a first direction toward a brake stack; detecting the pusher reaching a furthest forward position; and commanding the brake actuator to translate the ball nut in a second direction opposite the first direction for a predetermined retraction distance.

Abstract: An electro-hydrostatic brake system includes a motor controller configured to receive a brake command, a motor in electronic control communication with the motor controller, and a pump mechanically coupled to the motor. In various embodiments, the electro-hydrostatic brake system further includes a hydraulic tank fluidly coupled in fluid providing communication with the pump, a hydraulic pressure rail fluidly coupled in fluid receiving communication with the pump, and a brake actuator in fluid communication with the hydraulic pressure rail and configured to exert a braking force on a wheel, wherein the braking force is directly modulated by the motor and/or the pump.

Abstract: A method including infiltrating a porous fiber preform with a slurry including a carrier fluid and a first plurality of solid particles wherein the first plurality of solid particles includes at least a first ceramic material, drying the slurry to form a greenbody preform, machining the greenbody preform to a target dimension, depositing a protective layer precursor including a second plurality of solid particles on the machined greenbody preform wherein the second plurality of solid particles includes at least a second ceramic material, and infiltrating the machined greenbody preform with a molten infiltrant to form a composite article including an integral protective layer.

Abstract: Systems, methods, devices and non-transitory, computer-readable mediums are disclosed for device-to-device caching. In some implementations, a method includes: registering, by an electronic device, a cache service on a local area network (LAN), the LAN including other registered electronic devices; generating, by the electronic device, a content map for cached content, the content map generated from descriptors of the cached content and including data indicating that the cached content described by the content descriptors is possibly cached or is definitely not cached by the electronic device; advertising, by the electronic device, the registered cache service and the content map; receiving, by the electronic device, a request for content from a requesting electronic device registered on the LAN; determining, by the electronic device, that the requested content is cached; and sending, by the electronic device, the requested content to the requesting electronic device.

Abstract: Disclosed are systems, methods, devices and non-transitory, computer-readable storage media for edge caching shared devices. In some implementations, a method comprises: receiving, by an edge cache server on a local area network (LAN) from a client device, a locate server request; determining, by the edge cache server, that the edge cache server has established server affinity with a user of the client device; sending, by the edge cache server to the client device, affinity data corresponding to the user; receiving, by the edge cache server from the client device, a request to transfer user data corresponding to the user; determining, by the edge cache server, that a new version of the user data is available; downloading, by the edge cache server, the new version of the user data; and sending, by the edge cache server to the client device, the new version of the user data.

Abstract: Embodiments of apparatuses, methods, and systems for a multithreaded processor core with hardware-assisted task scheduling are described. In an embodiment, a processor includes a first hardware thread, a second hardware thread, and a task manager. The task manager is to issue a task to the first hardware thread. The task manager includes a hardware task queue in which to store a plurality of task descriptors. Each of the task descriptors is to represent one of a single task, a collection of iterative tasks, and a linked list of tasks.

Abstract: Disclosed are systems, methods, devices and non-transitory, computer-readable storage mediums for edge caching shared devices. In some implementations, a method comprises: receiving, by a client device on a local area network (LAN), a request for data transfer from a user of the client device; determining, by the client device, if one of a plurality of edge cache servers on the LAN has established server affinity with the user; if an edge cache server has established server affinity with the user, initiating, by the client device, data transfer between the client device and the edge cache server; and if no edge cache server on the LAN has established server affinity with the user, establishing, by the client device, server affinity between the user and one of the plurality of edge cache servers.

Abstract: A brake actuator system may comprise a brake actuator comprising a ball screw, a ball nut coupled to the ball screw, and a ram coupled to a ram end of the ball nut; a position sensor coupled to the brake actuator; a processor in electronic communication with the brake actuator and the position sensor; and/or a tangible, non-transitory memory configured to communicate with the processor, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by the processor, cause the processor to perform operations. The operations may comprise commanding the brake actuator to translate the ball nut in a first direction toward a brake stack; detecting the ram reaching a furthest forward position; and commanding the brake actuator to translate the ball nut in a second direction opposite the first direction for a total retraction distance.

Abstract: An electro-hydrostatic brake system includes a motor controller configured to receive a brake command, a motor in electronic control communication with the motor controller, and a pump mechanically coupled to the motor. In various embodiments, the electro-hydrostatic brake system further includes a hydraulic tank fluidly coupled in fluid providing communication with the pump, a hydraulic pressure rail fluidly coupled in fluid receiving communication with the pump, and a brake actuator in fluid communication with the hydraulic pressure rail and configured to exert a braking force on a wheel, wherein the braking force is directly modulated by the motor and/or the pump.

Abstract: A brake monitoring and adjustment control system includes an electromechanical brake actuator controller (EBAC) and at least one sensor operatively connected to the EBAC. The sensor is configured to sense a characteristic of a brake and provide a feedback signal to the EBAC. The system includes a switch for turning power to the sensor on and off to reduce the duration with voltage applied to the sensor. Reducing the duration in which voltage is applied to the sensor reduces power consumption and assists with mitigating electro-migration growth.

Abstract: A method for fault detection and accommodation for a controller and actuator system is provided. The method includes receiving, from a controller, a flag at an actuator in response to an excitation voltage and current falling below a threshold value, engaging a sensor in the actuator in response to receiving the flag, receiving, using the sensor a first load cell signal and a second load cell signal in response to the sensor being engaged, determining how actuator is operating brake based on the received flag, first load cell signal, and second load cell signal, adjusting a state of the actuator based on the determination, and reporting the state of the actuator by transmitting a report signal to the controller.

Abstract: An example system includes a slave processor and a master processor. The master processor is configured to communicate with the slave processor over a digital communication link in a first mode, and over an analog communication link in a second mode. A method is also disclosed.

Abstract: A method including infiltrating a porous fiber preform with a slurry including a carrier fluid and a first plurality of solid particles wherein the first plurality of solid particles includes at least a first ceramic material, drying the slurry to form a greenbody preform, machining the greenbody preform to a target dimension, depositing a protective layer precursor including a second plurality of solid particles on the machined greenbody preform wherein the second plurality of solid particles includes at least a second ceramic material, and infiltrating the machined greenbody preform with a molten infiltrant to form a composite article including an integral protective layer.