Method and system for anti-jamming simulation
AssigneeAmerican GNC Corporation
InventorsChing-Fang Lin, Qiang Deng
Life of this patent
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Abstract
A real time simulation method for jamming and anti-jamming evaluation of GPS systems and GPS/IMU integrated systems includes the steps of receiving real time trajectory data from a 6DOF trajectory generator and generating jamming signals, global positioning system simulated measurements, and inertial measurement unit simulated electronic signals which are injected into an on-board integrated global positioning system/inertial measurement unit system. When the on-board integrated global positioning system/inertial measurement unit system is excited in dynamic operation, a performance under various jamming conditions is able to be tested and evaluated as if carrying a real transportation test under a real jamming environment.
Claims7
A real time simulation method for jamming and anti-jamming evaluation of GPS systems and GPS/IMU integrated systems, comprising steps of:
- (a) converting a trajectory profile data in a 6-DOF trajectory generator into a plurality of motion parameters, including time tag, position vector, velocity vector, acceleration vector, rotation matrix, angular velocity vector, and angular acceleration vector;
- (b) outputting said motion parameters from said 6DOF trajectory generator to a GPS/IMU real time simulator via an Ethernet Network NE2000 card;
- wherein said motion parameters driving said GPS/IMU real time simulator to generate GPS signal and the inertial measurements corrupted with errors;
- (c) receiving a jamming command from said trajectory profile and simulating jamming signals;
- wherein said simulated jamming signals are directly injected into a GPS/IMU integrated system;
- (d) outputting said inertial measurements and GPS data from said GPS/IMU real time simulator to said GPS/IMU integrated navigation system;
- (e) collecting a plurality of navigation solutions from said GPS/IMU integrated navigation system and a true trajectory from said 6-DOF trajectory generator to perform navigation accuracy analysis and anti-jamming performance evaluation.
A real time simulation method for jamming and anti-jamming evaluation of GPS systems and GPS/IMU integrated systems, comprising the steps of:
- (a) inputting IMU measurement models and IMU error models into a GPS/IMU real time simulator according to a real IMU device of a GPS/IMU integrated system to be tested, wherein said IMU measurement models comprise gyro measurement model and accelerometer measurement model which are determined by inertial sensor principles, and that said IMU error models comprises gyro error model and accelerometer error model which are defined by a user according to said real IMU device used in said GPS/IMU integrated system to be tested;
- (b) inputting jammer models into a jammer simulator of said GPS/IMU real time simulator;
- wherein said jammer model is determined by a jammer location, a jammer type, a jammer source power, and a platform location;
- (c) producing real time trajectory data from said 6DOF trajectory generator and send said real time trajectory data to said GPS/IMU real time simulator and said jammer simulator of said GPS/IMU real time simulator, wherein said jammer simulator produces jamming signals according to said jammer model defined by said user, wherein said real time trajectory data are defined by said user and said GPS/IMU real time produces dynamic GPS measurements corrupted by said jamming signals and IMU signals as if a vehicle is really moving along a trajectory defined by said user, and as if said GPS/IMU integrated system is suffering a real jamming condition;
- (d) generating output data including real time IMU data by said IMU model of said GPS/IMU real time simulator, and said GPS measurements corrupted by said jamming signals by said GPS receiver model in said GPS/IMU real time simulator and said jammer model in said jammer simulator;
- (e) formatting said GPS measurement data corrupted by said jamming signals and converting said real time IMU data into IMU simulated electronic signals by an IMU signal generator in said GPS/IMU real time simulator, wherein said IMU signal generator is an interface board in an emulation computer provided in said GPS/IMU real time simulator;
- (f) processing said simulated GPS measurements corrupted by said jamming signals and generated IMU simulated electronic signals by a standard interface and a regulator and connector circuit to form suitable electrical specifications and a connector pin arrangement that is compatible to said GPS/IMU integrated system;
- and
- (g) injecting said simulated GPS measurements corrupted by said jamming signals and said IMU simulated electronic signals into said GPS/IMU integrated system, wherein when said GPS/IMU integrated system is excited in dynamic operation, a performance under various jamming conditions thereof is able to be tested and evaluated as if carrying a real transportation test under a real jamming environment.
Dependencies are inferred from the claim text.