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High-precision turntable low-speed rate accuracy detection method

A technology of rate accuracy and detection method, which is applied in the field of testing to achieve the effects of large gain sum, improved accuracy, and reduced ambient temperature

Active Publication Date: 2017-09-22
BEIJING INST OF AEROSPACE CONTROL DEVICES
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Problems solved by technology

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, the present invention provides a low-speed rate accuracy detection method for a high-precision turntable, which solves the problem that the high-precision and low-speed detection of the turntable cannot be effectively detected, and has the advantages of simple operation, Automatic measurement, strong anti-interference ability, high detection accuracy, etc.

Method used

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  • High-precision turntable low-speed rate accuracy detection method
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Embodiment

[0047] A low-speed rate accuracy detection method for a high-precision turntable, comprising the following steps:

[0048] Step 1. Turn on the dual-frequency laser generator 1, photoelectric receiver 2, and digital phase card 7 in the detection system, record the position of the turntable 8 at 84°, and record the measurement results displayed on the digital phase card 7 Clear;

[0049] Step 2: Let the turntable 8 move at a set fixed angle displacement of 1°, and record the angular position θ after the i-th turntable 8 moves i and angular position θ i Corresponding measured value of digital phase card 7 The results are shown in Table 1 below; the adjacent two measured values make the difference Any one of the two turntable angular positions corresponding to the maximum difference in is set as the rough reference of sinusoidal zero position θ k ,θ k = θ 7 =91°; θ i = θ 0 +i×δ 1 , where i is the number of times the turntable moves, i=1,2,3,...,k,k+1,k+2,...,k is a p...

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Abstract

The invention relates to a high-precision turntable low-speed rate accuracy detection method. The method includes the following steps that: (1) a detection system is turned on, and a zero position is set; (2) a sine zero position benchmark is roughly searched; (3) a sine zero position benchmark is precisely searched; (4) the arm length of a sine alarm (6) is calibrated; (5) angular rate data are acquired; and (6) an angular rate is calculated and displayed. Compared with a conventional method according to a turntable internal angular encoder a or an externally connected angular encoder is adopted to perform rate accuracy detection, the high-precision turntable low-speed rate accuracy detection method of the invention realizes high-precision dynamic angular rate detection of a turntable which operates at a low speed and can assist in solving the problem of incapacity of effectively detecting the high-precision rate accuracy of the turntable. The detection method of the invention has the advantages of simple operation, automatic measurement, strong anti-interference ability and high detection precision.

Description

technical field [0001] The invention relates to a low-speed rate accuracy detection method of a high-precision turntable, belonging to the technical field of testing. It mainly completes the detection of the low-speed angular rate information of the test turntable. Background technique [0002] The test turntable is the main equipment for inertial product development, testing, factory evaluation and calibration. The position and speed accuracy of the turntable are the main factors affecting the calibration. Especially for the speed turntable, its rate characteristics are very important, and the technical indicators need to be completed before the turntable equipment leaves the factory. detection. For the case of high speed (ω≥10° / s), photoelectric counters are usually used for detection, while for the case of low speed (ω<10° / s), other detection equipment and methods can only be used. [0003] At present, there are relatively few researches on high-precision and low-spe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P3/36
CPCG01P3/36
Inventor 刘军张大军戴德庆钟正虎桂普国于洋
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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