초록 ▼

A real-time IMU emulation method for GNC method includes the step of receiving real-time flight data from a 6DOF flight simulator and generating simulated IMU electronic signals according to the IMU measurement modules and error modules defined by the user, and injecting said simulated IMU electroni

A real-time IMU emulation method for GNC method includes the step of receiving real-time flight data from a 6DOF flight simulator and generating simulated IMU electronic signals according to the IMU measurement modules and error modules defined by the user, and injecting said simulated IMU electronic signals into an on-board GNC system which causes the on-board GNC system into "thinking" that the vehicle is really moving. The on-board GNC system which is installed on the vehicle is motionless during the emulation test, so that the testing can be carried out in a laboratory or in an anechoic chamber facility and the IMU emulation can achieve the easy, effective, and least intrusive injection of emulated IMU signals into the INS computer. The present invention has features supporting the final integration of a developmental Guidance, Navigation, or Control (GNC) system installed into a vehicle. It assures testers that GNC avionics on-board vehicle work properly before and during a flight test. It also helps to debug on-board GNC avionics and verify system performance.

대표청구항 ▼

[ What is claimed is:] [1.]1. A real-time IMU emulation method for GNC system, comprising the steps of:(a) inputting IMU measurement modules and IMU error modules into a real-time IMU emulation system according to a real IMU device of an on-board GNC system to be tested, wherein said IMU measurement

[ What is claimed is:] [1.]1. A real-time IMU emulation method for GNC system, comprising the steps of:(a) inputting IMU measurement modules and IMU error modules into a real-time IMU emulation system according to a real IMU device of an on-board GNC system to be tested, wherein said IMU measurement modules comprises Gyro measurement model and accelerometer measurement model which are determined by inertial sensor principles, and that said IMU error modules comprises Gyro error module and accelerometer error module which are defined by a user according to an actual IMU used in said on-board GNC system to be tested;(b) producing real-time trajectory data from a 6DOF trajectory generator and sending said real-time trajectory data to said real-time IMU emulation system, wherein said real-time trajectory data are defined by said user and said real-time IMU emulation system produces IMU signals as if a vehicle is really transporting along a trajectory defined by said user;(c) generating output data that are real-time IMU data identical to said real IMU device in a designated mission by said IMU model of said real-time IMU emulation system, wherein said real-time IMU data are determined by said 6DOF trajectory data, said IMU measurement modules, and said IMU error modules;(d) converting said real-time IMU data into Simulated IMU electronic signals by an IMU signal generator in a simulator of said real-time IMU emulation system, wherein said IMU signal generator is an interface board in said emulation computer for producing said Simulated IMU electronic signals which are identical to that produced by said real IMU in said on-board GNC system;(e) processing said generated Simulated IMU electronic signals by a regulator and connector circuit to form suitable electrical specifications and connector pin arrangement that is compatible to a GNC/IMU interface; and(f) injecting said electronic signals into said on-board GNC system to excite said on-board GNC system, wherein with said dynamic 6DOF trajectory and compatible electronic signals, said real-time IMU emulation system provides same IMU signals as a real IMU on a transporting carrier, and that when said on-board GNC system is excited in dynamic operation, a performance thereof is able to be tested and evaluated as if carrying out a real transportation test.