
The first step is to choose the ‘‘master’’ and ‘‘slave’’ integration routines and determine the slow and
fast frame times. The aircraft pitch example used the one-step RK-4 for ‘‘master’’ and ‘‘slave.’’ For
this example, the multistep AB-2 integrator will be used to integrate both the slow and fast states.
AB-2 integration is a popular numerical integrator, particularly in applications involving ground
vehicle, aircraft, missile, ship, power plant, and chemical process simulators where a real-time
solution of the model equations is required. Real-time numerical integration is the subject of the
following section.
Looking at the AB stability regions ...