Addition to the ACSL simulation models of target, missile and countermeasures

When conducting simulations it may be necessary to provide new functions to the existing models, such as models of supporting systems or plain simulation technical functions. This report describes a few of these functions which have been implemented in the models. The new functionality includes an improved warner, an aim model, a model for extended targets, a model for computing the distance to the target as well as an angle of attack implementation. Warner model The model of the Missile Approach Warner has been extended, and can now simulate warning systems that use "time until impact" as argument. Aim model To increase the missiles probability to hit its target, the missile should be aimed slightly ahead of the target. Some missiles have a built-in function that provides this, but for some missiles it is the gunner's responsibility. Therefore, an aiming model has been developed to show the impact of the aiming on the results of the simulation. Extended targets Using the obscuration model, a flare (point target) is either visible or invisible for the seeker. In reality, a flare can be partly visible behind the target. Therefore, a model for extended flares has been developed and is available in the model. Distance to target The distance to the target at the end of a simulation is determined using the geometry data for the target available in the directX-files. This gives a fairly accurate approximation of the distance. Angle of attack To determine the angle of attitude of the aircraft, an estimation of the angle of attack is implemented. This gives a more accurate computation of the IR-radiation of the aircraft as seen from the robot.