Rotax发动机转速传感器设计研究

Research of rev sensor of Rotax aviation engine

根据无人驾驶飞行器的使用需求,设计了一种针对通用航空和无人机常用的ROTAX系列活塞式发动机的转速测量传感器,能够在线采集转速信号,并通过数字接口实时传输至地面,使操作人员能够准确掌握发动机工作状况。该传感器包括信号调理电路和采集处理电路2部分,通过Multisim仿真软件论证其电路的合理性,并分析了系统的误差范围。在某型号飞艇的飞行试验中,该转速传感器测量误差较小、工作稳定、抗干扰能力强,满足飞行控制使用的要求。由于它安装方便,而且输出接口为常用的数字信号,成本较低,可以在使用活塞式发动机的无人驾驶飞行器上普遍适用。

According to the requirements of unmanned aircraft, a type of rev sensor is designed which can be used in ROTAX series piston engines and the engine is adopted in general aviation and UVA. It can get the online rev signal and transmit to the ground through the digital interface real-time. It includes signal regulate circuit and acquisition and processing circuit,and its rationality of the circuit is demonstrated by the simulation software Multisim, and the error range of this system is analyzed. In a certain type of the airship＇s flight test, the rev sensor performance is very good, and it meets the needs of the flight control by its simple installation, digital signal output, and it can be used in the unmanned aircraft with piston engines.