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中文摘要：
为了提高无人直升机的控制性能，实现无人直升机的长距离稳定飞行，针对所采用的汽油动力无人直升机对航向角测量传感器的影响干扰，结合RS232和TwI通信方式，设计和实现基于HMC5883L三轴数字罗盘的偏航角的稳定测量；实验验证和实际飞行表明，此次设计所测量的偏航角数据准确，响应速度快，且不受汽油机电磁干扰的影响，具有很好的稳定性。
英文摘要：
In order to improve the control performance of unmanned helicopters, to achieve stable long--distance flight, and to prevent the heading angle measuring sensor from the interference that generated from the use of gasoline--powered unmanned helicopter, this paper present a design and implementation of the heading angle measurement using the HMC5883L digital compass based on RS232 and TWI corn mucation mode. Experimental validation and actual--flight data shows that the design can measures accurately, responses quickly, and re- sists the interference, also has good stability.
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