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Encoding type sun sensor signal processing system based on FPGA

A solar sensor and signal processing technology, applied in general control systems, control/regulation systems, instruments, etc., can solve the problem that the signal processing method cannot meet the development needs of high integration and miniaturization of circuits, and achieves good and achievable performance, realizing circuit miniaturization, and easy realization

Active Publication Date: 2014-10-08
BEIJING INST OF CONTROL ENG
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Problems solved by technology

With the improvement of component integration and the development trend of small integration of solar sensors, traditional signal processing methods can no longer meet the development needs of high integration and miniaturization of circuits.

Method used

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  • Encoding type sun sensor signal processing system based on FPGA
  • Encoding type sun sensor signal processing system based on FPGA
  • Encoding type sun sensor signal processing system based on FPGA

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Embodiment Construction

[0036] Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail:

[0037] Such as figure 1 Shown is the module structure diagram of the internal signal processing of the encoded sun sensor FPGA, which is composed of figure 1 It can be seen that the FPGA-based coded sun sensor signal processing system includes FPGA, clock oscillator, AD converter and analog switch, where FPGA includes: clock frequency division module, coarse code angle processing module, fine code angle processing module, coarse and fine code synchronization and data packaging module;

[0038] The clock frequency division module divides the frequency of the system input clock by 256, and the clock after frequency division is used for the input clock of the coarse code angle processing module, the fine code angle processing module, the coarse code synchronization and data packaging module.

[0039] Such as figure 2 The work flow chart of...

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Abstract

An encoding type sun sensor signal processing system based on an FPGA comprises the FPGA, a clock crystal oscillator, an AD converter and an analog switch, wherein the FPGA comprises a clock frequency divider module, a coarse code angle processing module, a fine code angle processing module and a coarse and fine code synchronization and data package module. The encoding type sun sensor signal processing system fully utilizes the advantages of the FPGA in parallel running system structure design and easy realization of a CORDIC quick optimization algorithm in the FPGA and remarkably improves the processing speed and the data update rate of an encoding type sun sensor, computation is simple, and projects are easy to achieve.

Description

technical field [0001] The invention relates to a coded solar sensor signal processing system, and the algorithm is designed based on the advantages of FPGA in parallel operation architecture design and the easy-to-realize characteristics of CORDIC fast optimization algorithm in FPGA. Background technique [0002] The sun sensor is an important measurement component of the satellite attitude control system, and it is also the earliest attitude sensor used for satellite attitude measurement. It is used to measure the incident angle of the sun relative to the sensor. [0003] The coded sun sensor uses a dedicated integrated silicon photocell as the core device, with a measurement accuracy of 0.05° and a field of view of 124°×124°. Sun sensor signal processing includes coarse code signal processing, fine code signal processing and field of view monitoring code signal processing. The function of the signal processing circuit is to process the current signal of the optical probe...

Claims

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Application Information

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IPC IPC(8): G05B19/042
Inventor 赵媛莫亚男刘鑫吕政欣贾锦忠
Owner BEIJING INST OF CONTROL ENG
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