基于FPGA的导流叶片角度数字化测量系统

Digitization measurement system of guide vane angle based on FPGA

导流叶片角度的数字化测量是设计发动机数字式控制器的重要环节。介绍了自整角机的工作原理,以现场可编程门阵列(FPGA)芯片为控制核心,结合电压/频率转换(VFC)和等精度测频法,对测量系统进行了硬件和软件设计,最后进行了实验验证。通过在实验室和现场测试证明:该测量方法正确,测量系统可靠,其测量角度相对误差不超过0.2%。

Digitization measurement of guide vane angle is an important link when engine digital controller is designed. Working principle of automatic adjust-angle transformer is introduced,and in combination with V / F conversion（ VFC） and equal precision frequency measurement method,hardware and software of the measuring system are designed,using FPGA chip as control core,experimental verification is carried out. Experimental result in lab and airplane show that measuring method is correct and the angle measurement system is reliable and relative error of angle measurement is less than 0. 2 %.