ABSTRACT
Parallel navigation is the strategy used by predators to pursue their prey. It can be considered as a law of nature. Based on this law, a wide class of guidance laws can be built. The Proportional navigation (PN) guidance is the simplest law belonging to this class. The terms lateral acceleration and lateral motion were used to characterize the motion in a plane orthogonal to the line-of-sight. However, the class of guidance laws implementing parallel navigation does not necessarily satisfy because the acceleration vector required by the guidance law does not lie in this plane. Three guidance laws are considered: proportional navigation; nonlinear guidance, without measurements of target acceleration; and nonlinear guidance utilizing measurements of target acceleration. The examples show the effectiveness of the guidance laws against maneuvering targets and their superiority to PN and augmented proportional navigation guidance.
