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现有的磁航向测量系统体积、重量、功耗偏大,并且调试、误差补偿算法复杂、整体费用偏高,针对这些问题,设计了一个在小角度俯仰、滚转情况下的小型磁航向测量系统。该系统采用带DSP指令的32位高速处理芯片AVR32 UC3B0256、新型倾角传感器SCA100T以及磁阻传感器HMC1022构成数字化解算平台,实现了误差补偿。实验数据显示,在水平状态下,磁航向测量值最大误差为±1.4;当俯仰角低于30°或滚转角低于35°时,随着角度的增加,磁航向输出误差变化不大,最大误差分别为3.7°和2.8°;当俯仰角超过30°或滚转角超过35°时,磁航向输出误差会急速增大。结果表明,该系统在小角度俯仰、滚转情况下具有较准确的磁航向角解算能力。
The existing magnetic heading measurement system has large volume, weight and power consumption, and the debugging and error compensation algorithms are complex and the overall cost is high. Aiming at these problems, a small magnetic heading measurement system. The system uses DSP with the 32-bit high-speed processing chip AVR32 UC3B0256, a new tilt sensor SCA100T and magnetoresistive sensor HMC1022 form a digital solution platform, to achieve the error compensation. The experimental data show that the maximum error of the measured magnetic heading is ± 1.4 in the horizontal state. When the pitch angle is less than 30 ° or the roll angle is less than 35 °, the output error of the magnetic heading varies little with the increase of the angle. The maximum The errors are 3.7 ° and 2.8 ° respectively. When the pitch angle exceeds 30 ° or the roll angle exceeds 35 °, the output error of the magnetic heading rapidly increases. The results show that the system has a more accurate solution of the magnetic heading angle in the case of small-angle pitch and roll.