6 results about "Inertial platform" patented technology

The application relates to the field of inertial platforms, and particularly discloses an inertial platform health assessment method, which comprises the following steps: scoring a plurality of parameters of an inertial platform, the plurality of inertial platform parameters comprising a first inertial platform parameter group, a second parameter group and a third parameter group, the first parameter group, the second inertial parameter group and the third parameter group corresponding to a first parameter category, a second parameter category and a third parameter category respectively; determining a first score corresponding to the first parameter category according to the score of the first parameter group; determining a second score corresponding to the second parameter category according to the score of the second parameter group; determining a third score corresponding to the third parameter category according to the score of the third parameter group; and determining a comprehensive score of the inertial platform according to the first score, the second score and the third score. The application can provide a scheme for inertial platform health assessment and guide inertial platform health maintenance.

A kind of optical fiber gyro inertial platform gyro installation error angle test and compensation method, for testing optical fiber gyro platform optical fiber gyro is installed in platform body after the installation error angle relative to hexahedral coordinate system, using based on instrument installation and instrument error model, error coefficient calibration when gyro installation error is coupled with ground speed in gyroscope output, so as to influence the true value of the calibration result of instrument error coefficient, calibration is carried out in different azimuth, and the ground speed coupled with gyro installation error is different, so the calibration results of four orthogonal azimuths are combined, to realize the gyro installation error angle solution in analytical way.The gyro installation error angle obtained is compensated to error model, to solve the test problem of high-precision optical fiber gyro platform gyro precision.

The application provides an inertial platform fault injection and testing method based on redundancy technology, aiming at an inertial platform accelerometer height measurement and altimeter combined error feedback compensation height measurement system adopting redundancy technology, four faults of platform noise interference fault, platform large interference torque fault signal, altimeter noise fault and altitude redundancy error feedback fault, adopting a time injection function mode, combining an inertial platform mechanical motion model, a direct current torque motor model and a gyroscope measurement model established by a transfer function method, organically combining the above faults and signals into a closed loop closed system, effectively simulating the altitude measurement output signal of the redundancy technology based on the fault state, thereby realizing the fault injection simulation of the inertial platform system and realizing the equivalent function of the testing system.

The application relates to the field of inertial measurement, and particularly discloses a method for taking the positive of a four-axis inertial platform table body, which comprises the following steps: acquiring the projection of a gravity vector in a table body coordinate system of the four-axis inertial platform; determining the projection of the gravity vector in a base coordinate system of the four-axis inertial platform according to the projection of the gravity vector in the table body coordinate system and frame angle information of the four-axis inertial platform; determining a target frame angle for platform taking the positive according to the projection of the gravity vector in the base coordinate system; and generating a rotation trajectory of the four-axis inertial platform according to the target frame angle. The scheme has the advantages that the precision jump and precision over tolerance of a three-floating gyroscope after long-time storage can be avoided.

The application discloses a kind of optical fiber gyro inertial platform angular vibration transmission characteristic test methods, including synchronous acquisition position angular vibration table excitation angle signal and the frame angle signal of optical fiber gyro inertial platform;According to the frame angle signal of optical fiber gyro inertial platform, the method for obtaining optical fiber gyro inertial platform attitude angle signal is adopted navigation solution, and it is relevantly operated, and relevant characteristic function is obtained;According to the relevant characteristic function, the amplitude-phase characteristic solution of stable loop is carried out, and the amplitude of stable loop and the phase of stable loop in optical fiber gyro inertial platform are obtained;The application also discloses a kind of optical fiber gyro inertial platform angular vibration transmission characteristic test system, including position angular vibration table, optical fiber gyro inertial platform, optical fiber platform ground test system, position angular vibration table control cabinet and electric control box.The application can be applied to the transmission characteristic evaluation of optical fiber gyro inertial platform angular vibration, with higher accuracy and flexibility.

This invention relates to a machining apparatus and method for machining grooves and holes in the inner cavity of an inertial platform frame workpiece, belonging to the field of precision machining technology. The machining apparatus includes a main spindle connecting rod, a small spindle connecting rod 8, and a small spindle, driven by a machine tool spindle. The overall length of the machining apparatus can be adjusted to fit the inner cavity of the workpiece by moving bolts within a locking groove. During machining, the machining apparatus is first installed and adjusted to the required length. The verticality of the small spindle is then checked using a mandrel and a dial indicator. The workpiece is then clamped onto the worktable. By controlling the rotation angle of the machine tool spindle, the small spindle and its cutting tool are driven to sequentially machine the cross groove at the bottom of the workpiece's inner cavity, the 45° inclined grooves on the bottom and top sides, and the holes at the bottom of each groove. This invention has a simple structure, good rigidity, and can complete the machining of complex features in multiple directions of the inner cavity in a single clamping operation, significantly improving machining efficiency, reducing the cost of specialized tooling, and offering strong versatility.