Adaptive Disturbance Mitigation System

To address the Navys need for tow point surge mitigation of unmanned surface vehicles (USVs), Physical Optics Corporation (POC) has developed an Adaptive Disturbance Mitigation System (ADiMiS) that is based on dynamic control methodology. ADiMiS uses the real-time motions of the tow system to compute control actions for current and near-future time steps to mitigate tow point disturbance. In Phase I, we developed an ADiMiS controller that reduces the pitch and yaw disturbances of the AQS-20 by an average of >9 dB (for all wave directions relative to USV directions) in the presence of tow point surge from +/-2 knots to +/-0.5 knots in sea states <=3 at towed speeds up to 20 knots. When tested against Navy provided data, the ADiMiS stabilized towed body pitch and yaw averages <0.1 deg and <0.02 deg, respectively. In Phase II, POC will work with a prime contractor to optimize the ADiMiS, and collaborate with Raytheon to validate the optimized ADiMiS and convert it into an AQS-20 loadable flight control software disc. This disk is intended to support future to-be-planned AQS-20 sea trials of the ADiMiS based flight control program through a Phase II.5 or other contractual vehicles.