固冲发动机进气流量测量及卡尔曼滤波应用研究

Solid Ramjet Motor Flow Measurement and Application of Kalman Filter

为了提高固冲发动机进气流量的测量精度和响应速度,采用均速管流量计(德尔塔巴流量计)测量进气道内进气气流的平均流速。基于PLC和PC计算机组成固冲发动机进气流量的高速高精度测量系统,设计了自适应且实时响应的卡尔曼滤波器,以消除测量系统中的随机误差。测试结果表明,固冲发动机进气流量精度得到提高,且整个测试系统响应快,满足实际需要。

In order to improve the accuracy and response rate of solid ramjet motor inlet flow measurement,the averaging velocity tube flowmeter（ delta flowmeter） is used for inlet flow rate measuring,the high speed and high precision measurement system is established based on PLC and PC,the Kalman filter which is self-adaptive and responds in real time is designed to eliminate the random errors in the measuring system. The testing results show that the precision of solid ramjet motor inlet flow measuring is promoted and the responding speed of this measurement system is high enough for practical use.