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基于Fuzzy ART聚類(lèi)的衛星在軌姿態(tài)監測系統設計
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沈陽(yáng)工學(xué)院

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Design of satellite attitude monitoring system in orbit based on Fuzzy ART clustering
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    摘要:

    針對傳統衛星在軌姿態(tài)監測系統無(wú)法確定在軌姿態(tài)向量與正常向量匹配度,導致衛星在軌姿態(tài)角度監測結果不精準的問(wèn)題,提出了基于Fuzzy ART聚類(lèi)的衛星在軌姿態(tài)監測系統設計。設計系統硬件結構,根據GPS解算方位角和俯仰角,隔離載體擾動(dòng)。使用MSP430微控制器內部集成數字/模擬信號轉換器,統一CPU指令和尋址模式。通過(guò)讀取指令代碼,完成由指令代碼指定操作。使用AS5145B磁角位置編碼器,保證每個(gè)單元上都能產(chǎn)生磁鐵場(chǎng)強,輸出脈沖信號。通過(guò)雙軸磁傳感器HMC6352的電磁羅盤(pán)電路,找出衛星在軌姿態(tài)大致方向。利用Fuzzy ART聚類(lèi)衛星在軌姿態(tài)監測數據,確定聚類(lèi)中心,判定衛星在軌姿態(tài)向量與正常向量匹配度,根據匹配結果,開(kāi)辟新的記憶節點(diǎn),給出報警信息,完成姿態(tài)監測。實(shí)驗結果表明,所設計衛星在軌姿態(tài)監測系統在軌道圈數為1圈時(shí)施加控制力矩,能夠迅速使姿態(tài)達到穩定;軌道圈數為2圈時(shí),z軸方向的俯仰角與實(shí)際三維角度相差1°,表明該系統對衛星在軌俯仰角和方位角的監測準確率較高。

    Abstract:

    Aiming at the problem that the traditional satellite on-orbit attitude monitoring system cannot determine the degree of matching between the on-orbit attitude vector and the normal vector, resulting in inaccurate satellite on-orbit attitude angle monitoring results, a satellite on-orbit attitude monitoring system design based on Fuzzy ART clustering is proposed. Design the hardware structure of the system, calculate the azimuth and pitch angles according to GPS, and isolate the carrier disturbance. Use the integrated digital/analog signal converter inside the MSP430 microcontroller to unify CPU instructions and addressing modes. By reading the instruction code, the operation specified by the instruction code is completed. Use AS5145B magnetic angle position encoder to ensure that each unit can generate magnet field strength and output pulse signal. Through the electromagnetic compass circuit of the dual-axis magnetic sensor HMC6352, find out the approximate direction of the satellite's on-orbit attitude. Use Fuzzy ART to cluster satellite on-orbit attitude monitoring data to determine the clustering center, determine the degree of satellite on-orbit attitude vector matching with the normal vector, and open up new memory nodes based on the matching results, give alarm information, and complete attitude monitoring. The experimental results show that the designed satellite on-orbit attitude monitoring system can quickly stabilize the attitude by applying a control moment when the number of orbital turns is 1 turn; when the number of orbital turns is 2 turns, the pitch angle in the z-axis direction is different from the actual three-dimensional angle 1°, indicating that the system has a high accuracy in monitoring the satellite's on-orbit pitch and azimuth angles.

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鄭穎,張偉,靳新,于千賀.基于Fuzzy ART聚類(lèi)的衛星在軌姿態(tài)監測系統設計計算機測量與控制[J].,2021,29(12):17-21.

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  • 收稿日期:2021-04-06
  • 最后修改日期:2021-07-12
  • 錄用日期:2021-07-12
  • 在線(xiàn)發(fā)布日期: 2021-12-24
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