Multi-sensor-based micro-satellite attitude determination method,Baffled sun sensor antenna alignment monitors,Device and method for realizing sun capture by zero momentums of micro-satellites

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3 results about "Sun sensor" patented technology

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A sun sensor is a navigational instrument used by spacecraft to detect the position of the sun. Sun sensors are used for attitude control, solar array pointing, gyro updating, and fail-safe recovery. In addition to spacecraft, sun sensors find use in ground-based weather stations and sun-tracking systems, and aerial vehicles including balloons and UAVs.

Multi-sensor-based micro-satellite attitude determination method

InactiveCN108279010AHelp miniaturizationSelf-governmentInstruments for comonautical navigationFault toleranceFilter algorithm

The invention relates to a multi-sensor-based micro-satellite attitude determination method, which determines the attitude of a micro-satellite by using a MEMS gyro, a magnetometer and a sun sensor asattitude determination sensors based on an improved federated filtering algorithm. According to the present invention, the application background of the micro-satellite is fully considered, and the sensors with advantages of low cost, small volume, low power consumption and the like are selected as the attitude sensors, wherein the MEMS gyro is used as the main attitude sensor, the initial attitude determination information is obtained through integral, and the magnetometer and the sun sensor are used as the auxiliary attitude sensors to timely correct the attitude determination result of theMEMS gyros; and the improved federated filtering algorithm is provided, and achieves the attitude calculation and information fusion based on the sensors, such that the attitude determination precision of the micro-satellite attitude determination system is effectively improved, and the advantages of excellent good fault tolerance, good real-time performance and the like are provided.

Owner:BEIJING MXTRONICS CORP +1

Baffled sun sensor antenna alignment monitors

InactiveUS20080169413A1Accurately determinedEliminate sourcePhotometry using reference valueInstruments for comonautical navigationOmnidirectional antennaDirectional antenna

A directional alignment and alignment monitoring sensor system that is designed to be mounted to a directional or omni-directional antenna wherein the system includes a sensor having one or more phototransistors that are associated with one or more baffle members and wherein each baffle member defines a restrictive light passageway toward a phototransistor such the by measuring the time that a phototransistor is illuminated, a correct orientation of the antenna may be accurately determined.

Owner:SUNSIGHT HLDG LLC

Device and method for realizing sun capture by zero momentums of micro-satellites

PendingCN107757951ASimple working modeMinimizeCosmonautic vehiclesSpacecraft guiding apparatusSolar sailOrbit

The invention provides a device and a method for realizing sun capture by zero momentums of micro-satellites. The device comprises an analog sun sensor, a magnetometer and a magnetic torquer, whereinthe analog sun sensor and the magnetometer are used for together determining the attitude of a satellite; and the magnetic torquer is used for providing a control moment in a rate damping process andused for enabling a normal axis of a solar array of the satellite to point to the vector direction of the sun as well as controlling an included angle between a normal line of the solar array of the satellite and the vector direction of the sun to be less than a preset threshold, thereby realizing sun capture by a zero momentum magnetic control mode of the satellite. The device and the method provided by the invention simplify the working mode of an attitude and orbit control system and improve the working reliability when the satellite enters an orbit in the early stage.

Device and method for realizing sun capture by zero momentums of micro-satellites

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Owner:北京千乘探索科技有限公司

3 results about "Sun sensor" patented technology

Multi-sensor-based micro-satellite attitude determination method

Baffled sun sensor antenna alignment monitors

Device and method for realizing sun capture by zero momentums of micro-satellites

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