Radio-frequency autonomous relative attitude measurement system applied between cluster objects

Abstract

The invention relates to a radio-frequency autonomous relative attitude measurement system applied between cluster objects. The system comprises two sets of relative attitude measurement devices with identical structures. Each set of devices include two transmitting antennas, three receiving antennas, two radio-frequency transmitting channels, three radio-frequency receiving channels, an auxiliary radio-frequency receiving channel, two dual-mode auxiliary radio-frequency channels, a baseband processing module, and a high-stability time-based module. The two sets of relative attitude measurement devices respectively receive and sending ranging signals, so that relative attitude measurement of a master member and a slave member can be completed without the need to use observation data provided by other cluster members. Therefore, when parts of members in the target cluster become valid, the relative attitude measurement function can still be provided normally. In addition, with the system, the real-time performance of whole-cycle calculation as well as the real-time performance and operation flexibility of the equipment can be improved.

Description

technical field [0001] The invention relates to a radio navigation and positioning device, in particular to a radio frequency autonomous relative attitude measurement system suitable for cluster targets, suitable for autonomous relative attitude measurement between cluster targets, and belongs to the field of navigation and positioning. Background technique [0002] With the continuous development of measurement technology, the research on relative attitude measurement technology between multiple targets has become an important direction. Its application fields include inter-satellite relative state measurement, spacecraft rendezvous and docking, and relative attitude measurement between spacecraft. [0003] The radio frequency autonomous relative attitude measurement device is composed of multiple transmitting antennas, receiving antennas, radio frequency transmitters, radio frequency receivers and baseband processing modules. When the radio frequency autonomous relative at...

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Problems solved by technology

[0004] At present, the antenna part of the radio frequency autonomous relative attitude measurement device often adopts a transmitting antenna and a receiving antenna, a transmitting antenna and two receiving antennas, three independent transmitting and receiving antennas, a transmitting and receiving common antenna and two receiving antennas, etc. In this way, these devices can realize the measurement of the relative distance or relative position between two targets. Some of these devices cannot measure the relative attitude, and other parts need multiple members to measure each other at the same time and synthesize the measurement data of multiple members. To obtain relative attitude information, these devices are unable to achieve direct relative attitude measurement between two targets

In addition, the current radio frequency autonomous relative attitude measurement devices all adopt a time-division working method, that is, only one member of the measurement device transmits signals in each time slot, while other members can only receive signals, so that it takes multiple time slots to complete a measurement cycle , the larger the number of members in the cluster, the longer the measurement period, which will affect the real-time performance of the measurement, or the number of members in the cluster has to be limited in order to ensure real-time performance

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