Target Simulation Systems
NSI-MI Technologies designs and manufactures specialized motion simulation systems to precisely simulate the movement of physical entities for use in virtual reality trainers and testers and for physical testing needs. We specialize in the areas of aerospace and defense enabling simulation for missiles, decoy and more.
RF Target Simulators
The evaluation of RF Sensors often requires a test capability where various RF scenes are presented to the Unit Under Test (UUT). These scenes may need to be dynamic, represent multiple targets and/or decoys, emulate dynamic motion, and simulate real world RF environmental conditions. An RF Target Simulator can be employed to perform these functions. The total test system is usually called Hardware in the Loop (HWTL) involving the sensor mounted on a Flight Motion Simulator (FMS), the RF Target Simulator presenting the RF Scene, and a Simulation Computer that dynamically commands everything in real time.
NSI-MI Technologies has designed and delivered several versions of Target Simulators as turnkey systems. The systems accept real-time commands from the customer’s simulation computer to dynamically create the desired target motion with desired angle of arrival accuracy. Our systems engineering expertise has allowed us to scale and tailor the system to meet the unique needs of each customer.
In the simplest of RF Target Simulators, target motion is created and presented to the UUT by electromechanically moving one or more emitters, representing targets along a spherical surface with the UUT at the focal point of the sphere. The advantage of this approach is low cost but can be limited in number of targets and dynamics of motion.
In the most complex and demanding of RF Target Simulators, an RF scene is generated that consists of multiple targets, decoys and other RF signals in the environment. The motion is highly dynamic and targets must be able to pass through the same location without occlusion. In this case, an array of many fixed emitters is employed across the field of view (FOV) of the UUT. The multiple elements of the RF Scene are created by energizing various elements of the array and steering the beam. This allows virtually unlimited velocity and acceleration of motion and supports emitting complex waveforms.
In addition to the above described systems, NSI-MI has delivered RF Target Simulators to meet very unique customer requirements. The following example is a portable anechoic compact range. It creates very high dynamic target motion by mechanically moving the compact range reflector, thereby changing the angle of arrival of the plane wave presented to the UUT. The mobile nature of the range allows the customer mate it with the UUT on an FMS when they want to test and to detach and roll away the chamber when they want to use the test chamber for purposes other than RF testing.