Method and system for testing dynamic accuracy of accelerometer in inertial platform system
An inertial platform and accelerometer technology, applied in the field of inertial testing, can solve problems such as the inability to obtain the dynamic accuracy of the inertial platform system, and achieve the effects of avoiding the influence of environmental factors, being easy to implement in engineering, and avoiding initial attitude errors.
Active Publication Date: 2020-09-18
BEIJING INST OF AEROSPACE CONTROL DEVICES
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Problems solved by technology
Using the traditional vibration test method, the output of acceleration and angular velocity will be affected by the attitude change of the platform body, so it is impossible to obtain accurate dynamic accuracy of the inertial platform system
At present, for the inertial platform system, there is no clear test method and test process for the vibration test to accurately test the dynamic error and dynamic accuracy
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[0047]The invention provides a method and system for testing the dynamic accuracy of the accelerometer of the full-attitude inertial platform system, which can accurately test the dynamic accuracy of the accelerometer of the inertial platform system under the condition of vibration along the direction of the sensitive axis of the accelerometer. In this method, the vibration power spectrum is firstly set according to the operating conditions of the inertial platform system; secondly, the first static comprehensive test, the vibration state comprehensive test and the second static comprehensive test are passed in each direction of the space, and the platform under static and vibration conditions are respectively measured. The acceleration output of the platform; finally, the dynamic accuracy of the accelerometer of the inertial platform system can be calculated by comparing the acceleration output of the platform under vibration conditions. This method obtains the acceleration ch...
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The invention provides a test method for dynamic accuracy of an accelerometer of a full attitude inertial platform system and a system thereof, which can accurately test the dynamic accuracy of the accelerometer of the inertial platform system under the vibration condition along accelerometer sensitive axis. The method is characterized in that a vibration power spectrum is set according to the useconditions of the inertial platform system; a first static comprehensive test, a vibration state comprehensive test and a second static comprehensive test are carried out in each direction of the space, and the acceleration output of the platform under static and vibration conditions can be respectively measured; the dynamic accuracy of the accelerometer of the inertial platform system can be calculated by comparing the acceleration output of the platform under vibration conditions. The static test data is used to remove the changes in the acceleration output and the angular velocity output caused by the change of the attitude platform in the vibration state comprehensive test data, so that accurate dynamic error of the inertial platform system is obtained, the steps are clear, the operation is simple, the engineering is easy to implement, and the test precision is high.
Description
technical field [0001] The invention relates to a method and system for testing the dynamic accuracy of an accelerometer of a full-attitude inertial platform system, belonging to the technical field of inertial testing. Background technique [0002] The inertial platform system has been widely used in the motion state measurement, navigation and positioning systems of various types of moving carriers (such as ships, aircraft, rockets, etc.). An important indicator of the dynamic performance of the platform system. Vibration test is the most commonly used method to test the dynamic performance of the system. For the flight navigation state of the inertial platform system, due to the influence of the earth's rotation, the platform body will rotate relative to the base. Using the traditional vibration test method, the output of acceleration and angular velocity will be affected by the attitude change of the platform body, so it is impossible to obtain accurate dynamic accuracy...
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IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 周娇王蕾
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES