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四隨動(dòng)式線(xiàn)加速度計動(dòng)態(tài)校準裝置的研制
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北京航天計量測試技術(shù)研究所

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TP394.1

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Development of Dynamic Calibrating Device with Four Turntables for Linear Accelerometer
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    摘要:

    常規振動(dòng)臺因輸出幅值有限無(wú)法滿(mǎn)足線(xiàn)加速度計高g值下的動(dòng)態(tài)校準,針對該問(wèn)題研制出帶四隨動(dòng)平臺的離心機。在分析了其工作原理基礎上,從結構及電控兩方面介紹了裝置研制過(guò)程。結構方面首先介紹了裝置軸系設計,其次以模擬計算出的軸系慣量值及要求轉速值為設計輸入進(jìn)行了電機選型計算,并介紹了測角碼盤(pán)的配置情況。電控方面,以穩速臺為例,采用“空間矢量脈寬調制+id=0控制”方法建立系統模型,并給出調速模式仿真結果。以隨動(dòng)臺為例,位置環(huán)設計采用復合控制方法,利用動(dòng)態(tài)誤差系數法由“雙十指標”推算出前饋控制器參數可行域。最后通過(guò)實(shí)驗對裝置速率精度及平穩性指標、跟隨正弦指令的幅值誤差及相移指標進(jìn)行了精度測試,結果表明校準裝置滿(mǎn)足項目指標要求,系統達到預期控制效果。

    Abstract:

    The conventional shaking table can not meet the dynamic calibration of linear accelerometer at high g value because of its limited output amplitude. To solve the problem, a centrifuge with four servo platforms is developed. Based on the analysis of its working principle, the development process of the device is introduced from the aspects of structure and electronic control. In the aspect of structure, the design of shafting system is introduced firstly. Secondly, the motor type selection calculation is carried out based on the inertia value and requiring speed value of shafting calculated by simulation, and the configuration of angle measuring codes is introduced. In the aspect of control system, taking the steady speed table as an example, the control system model is established by the method of "space vector pulse width modulation + id=0 control", and the simulation results of speed regulation mode are given. Taking the servo turntable as an example, the compound control method is adopted in the design of the position loop, and the feasible region of the parameters of the feedforward controller is deduced from the "double ten indexes" by using the dynamic error coefficient method. Finally, the accuracy of the device"s speed accuracy and stationarity index, the amplitude error following the sinusoidal command and the phase shift index are tested by experiments, and the results show that the calibration device meets the project"s requirements and the system achieves the expected control effect.

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張 功,趙子倫,楊 碩,王昱峰,胡勇翔,姚小龍.四隨動(dòng)式線(xiàn)加速度計動(dòng)態(tài)校準裝置的研制計算機測量與控制[J].,2020,28(4):261-265.

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歷史
  • 收稿日期:2019-07-28
  • 最后修改日期:2019-09-20
  • 錄用日期:2019-09-23
  • 在線(xiàn)發(fā)布日期: 2020-04-15
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