The invention relates to a method for measuring the deviation rate of an
airplane relative to a side direction of a
runway, and belongs to the technical field of
avionics display control. The method comprises the steps: firstly collecting the glide deviation of the
airplane relative to a standard glide slope, the
pressure altitude and ground velocity of the
airplane relative to the
runway, the length of the
runway and a set glide
slope angle, and solving the distance between the airplane and a heading
beacon station according to the above collected information; secondly solving the acceleration of the airplane in a side direction of the runway according to a roll angle, a
pitch angle, a
yaw angle, a selected course, and the X-axis, Y-axis and Z-axis accelerations of an airplane body coordinate
system; finally obtaining the deviation rate of the airplane relative to the side direction of the runway through employing a complementary filtering
algorithm. According to the invention, the method inhibits the high-
frequency noise in heading
beacon data and the low-
frequency noise in
inertia data while making the comprehensive use of the heading
beacon data and
inertia data, is higher in precision of output data, and can support a head-up flight guide function.