SYSTEM AND METHOD FOR SURVEYING A NON-STATIONARY PLATFORM SUBJECT TO THERMAL EXPANSION

    公开(公告)号:US20240201397A1

    公开(公告)日:2024-06-20

    申请号:US18066395

    申请日:2022-12-15

    CPC classification number: G01S19/41 G01S19/15

    Abstract: A method includes obtaining an initial survey of multiple receivers located on a dynamic platform. The method also includes obtaining sensor readings from the multiple receivers. The method further includes validating, using a differential calculator, the initial survey by (i) selecting a reference receiver and a target receiver from among the multiple receivers and (ii) calculating, based on the sensor readings and baselines between the reference receiver and one or more remaining receivers, a platform attitude, platform thermal expansion state, and survey error values corresponding to the target receiver. The method also includes, starting from a validated survey, adding a new receiver to the initial survey by (i) determining a baseline between the reference receiver and the new receiver and (ii) associating the baseline to a coordinate frame of the initial survey.

    Compact in-line reflective optical beam expander or reducer with adjustable focus

    公开(公告)号:US12007577B2

    公开(公告)日:2024-06-11

    申请号:US17453568

    申请日:2021-11-04

    CPC classification number: G02B27/0977 G02B19/0028 G02B27/14

    Abstract: An apparatus includes an in-line reflective optical system configured to receive an input optical beam and provide an output optical beam. The in-line reflective optical system includes first and second powered mirrors aligned back-to-back. The first powered mirror is configured to reflect the input optical beam as a first intermediate beam. The in-line reflective optical system also includes first and second reflective surfaces respectively configured to reflect the first intermediate beam as a second intermediate beam and to reflect the second intermediate beam as a third intermediate beam. The second powered mirror is configured to reflect the third intermediate beam as the output optical beam. A spacing between the first and second reflective surfaces and the first and second powered mirrors is adjustable to control a focus of the output optical beam without introducing boresight error in the output optical beam.

    Self-aligning radio frequency connector

    公开(公告)号:US11990715B2

    公开(公告)日:2024-05-21

    申请号:US17119988

    申请日:2020-12-11

    CPC classification number: H01R24/40 H01R13/6315

    Abstract: The present disclosure sets forth a rigid, self-aligning radio frequency (“RF”) connector comprising a rigid body with a first connection end and a second connection end opposite the first connection end. The RF connector can also comprise a recess disposed on an outer surface of the rigid body between the first and second connection ends, and a collapsible connector support that can comprise a connection portion and a collapsible portion. The collapsible connector support can be disposed within and protrude from the recess while also being configured to collapse into the recess. The collapsible connector support can also be configured to interface with an interfacing surface to facilitate generation of a reaction force sufficient to support the RF connector in an offset position relative to the interfacing surface and to nominally align the RF connector with a device to be connected.

    Ignition safety device for a multi-pulse or multi-stage rocket motor system

    公开(公告)号:US11988172B2

    公开(公告)日:2024-05-21

    申请号:US16952928

    申请日:2020-11-19

    CPC classification number: F02K9/94 F02K9/95 F42B15/01 F42C11/065 F42C15/40

    Abstract: An ignition safety device (ISD) used in an ignition system of a missile is configured to selectively control the ignition of two or more pulses or stages of a rocket motor propulsion system, based on a flight profile mode selection of a flight velocity mode, in which the missile is configured to travel at an optimized flight velocity, or a flight distance mode, in which the missile is configured to travel an optimized flight distance. The ISD is configured to selectively ignite the pulses or stages substantially simultaneously upon selection of the flight velocity mode, or in a delayed sequential manner upon selection of the flight distance mode. The ISD is also configured to selectively inhibit the delayed sequential ignition of the pulses or stages in the event of incidental ground or water impact of the missile after ignition of the primary pulse or stage.

    Hypersonic air-flow deflector, and attachment method

    公开(公告)号:US11987354B2

    公开(公告)日:2024-05-21

    申请号:US17739633

    申请日:2022-05-09

    CPC classification number: B64C30/00 B64C31/02 B64D1/02

    Abstract: A flow deflector for an aerial vehicle system has a flow deflector body, a clip arranged in an interior of the flow deflector body, and a spring within the clip. The flow deflector body includes a first portion at a forward end shaped to engage a surface of an aerial vehicle body and a second portion at an aft end shaped to engage a surface of a booster engine. The flow deflector body can include a plurality of body segments arranged to form the flow deflector body. The clip may be configured to fit around and engage a portion of an aft flange of the aerial vehicle body. The spring can be preloaded and arranged to press on the aft flange when the clip engages the portion of the aft flange.

    Differential probe with single transceiver antenna

    公开(公告)号:US11984922B2

    公开(公告)日:2024-05-14

    申请号:US17538305

    申请日:2021-11-30

    CPC classification number: H04B1/38 H04B1/18 H04B2001/3811

    Abstract: An apparatus includes an antenna, a transmitter configured to generate an outgoing electrical signal, and a receiver configured to receive an incoming electrical signal. The apparatus also includes a transformer configured to couple the antenna and the transmitter such that the outgoing electrical signal causes the antenna to radiate outgoing electromagnetic energy, couple the antenna and the receiver such that the incoming electrical signal is based on incoming electromagnetic energy received by the antenna, and electrically isolate the transmitter and the receiver. The antenna may include inner and outer compensating coils, the compensating coils may be configured to additively radiate the outgoing electromagnetic energy, and the incoming electrical signal may be based on a difference between the incoming electromagnetic energy as received by the compensating coils.

    Dual-path active damper for a resonant network

    公开(公告)号:US11984799B2

    公开(公告)日:2024-05-14

    申请号:US17572607

    申请日:2022-01-10

    CPC classification number: H02M1/15 H02M1/344 H02M3/158

    Abstract: A dual-path active damper reduces power losses while damping ringing waveforms in resonant circuits. One path clamps the peak value of a node voltage at less than a rated voltage of a protected device while allowing the node voltage to ring and decay naturally. Another path waits for some delay after the peak value is clamped until closing an active switch to draw a reset current through an RC snubber to actively dampen the ringing of the node voltage. The delay and on-time of the active switch are set to reduce or even minimize power losses for damping the ringing waveform within a specified period.

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