Digital gyro stabilized platform, on-line frequency characteristic soft testing system and method thereof
A digital gyroscope and stable platform technology, applied in the field of inertial navigation, can solve the problems of versatility and poor reliability, and achieve the effects of saving hardware costs, reliable testing methods, and simple and flexible operation
Active Publication Date: 2018-01-19
BEIJING INST OF AEROSPACE CONTROL DEVICES
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Problems solved by technology
The test point of the inherent test equipment needs to be realized by splitting the platform and circuit components, which has poor versatility and reliability
Method used
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Embodiment 1
[0064] Embodiment 1: in order to verify the practicability and correctness of the present invention, Image 6 Taking the platform stabilization loop as an example, the amplitude-frequency characteristic curves and phase-frequency characteristic curves collected from the test PC after least squares identification are given. From the test results of frequency characteristics, it can be known that the shear frequency of the platform stabilization loop is 28.43Hz, the amplitude margin is 8.29dB, and the phase margin is 45.89 degrees, which meet the requirements for the use of gyro-stabilized platforms.
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The invention relates to a digital gyro stabilized platform, an on-line frequency characteristic soft testing system and a method thereof. The digital gyro stabilized platform employs a distributed innovation form by combing an embedded stable loop computer and a high-speed serial bus, and has the advantages of stable platform, small system scale, low power dissipation, and stronger control flexibility and function expansibility. The on-line frequency characteristic soft testing system is composed of the gyro stabilized platform and a test PC machine, the digital stable loop computer in the platform is used for realizing sweep-frequency signal excitation, data acquisition and buffer memory functions, and the test PC machine employs a least square fitting method to calculate the amplitude frequency characteristic and phase-frequency characteristic of the stabilized platform. The soft testing system has no applied auxiliary circuit and power supply, frequency characteristic tests of three stable loops of a platform body, an internal ring, and an external ring can be switched through software, during a switching process, first power-off and second electrification cannot be required for the platform, hardware cost for testing is reduced, and the platform has the advantages of simple and flexible process, and traceable process data.
Description
technical field [0001] The invention relates to an all-digital control platform type inertial navigation system, in particular to a stability testing method of the platform type inertial navigation system, belonging to the field of inertial navigation. Background technique [0002] The gyro-stabilized platform is an inertial stabilization system that isolates the angular motion of the carrier. It has high navigation accuracy and is commonly used in the field of strategic weapons. The core of the gyro-stabilized platform is a high-precision gyroscope, which keeps the platform stable in a specific coordinate system through the torque device at the end of the platform shaft. [0003] Frequency characteristic is an important evaluation index of gyro stabilization platform. Existing products all use frequency characteristic tester (TD1250). When in use, a transition box needs to be connected in series between the platform and the circuit box (providing excitation signal injection...
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IPC IPC(8): G01C21/18G01C25/00
Inventor 彭荻闫光亚赵友杨晓莺赵启坤刘凯
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES