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Ellipse-N慣性衛(wèi)星組合導航系統(tǒng)

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簡單介紹
SBG Systems公司Ellipse-N慣性衛(wèi)星組合導航系統(tǒng)是 一款小型化、高性能的MEMS慣性衛(wèi)星組合導航產(chǎn)品,它包括了一個慣性測量單元(IMU)和運行一個增強的擴展卡爾曼濾波(EKF),內(nèi)部集成了工業(yè)級的單天線GNSS接收機,可以提供姿態(tài)(俯仰,橫滾,航向)、升沉以及導航數(shù)據(jù)。除此之外,Ellipse-N 還可以外接里程計、DGPS等輔助進一步提高產(chǎn)品測量的精度。Ellipse-N 共有兩個版本,BOX 版和小尺寸OEM 版,兩者只是在封裝以及接口外形有區(qū)別,測量精度方面無區(qū)別。

Ellipse-N慣性衛(wèi)星組合導航系統(tǒng)

的詳細介紹

SBG Systems公司Ellipse-N慣性衛(wèi)星組合導航系統(tǒng)

-單天線

一、SBG Systems公司Ellipse-N慣性衛(wèi)星組合導航系統(tǒng)概述

SBG Systems公司Ellipse-N是一款小型化、高性能的MEMS慣性衛(wèi)星組合導航產(chǎn)品,它包括了一個慣性測量單元(IMU)和運行一個增強的擴展卡爾曼濾波(EKF),內(nèi)部集成了工業(yè)級的單天線GNSS接收機,可以提供姿態(tài)(俯仰,橫滾,航向)、升沉以及導航數(shù)據(jù)。除此之外,Ellipse-N還可以外接里程計、DGPS等輔助進一步提高產(chǎn)品測量的精度。Ellipse-N共有兩個版本,BOX 版和小尺寸OEM 版,兩者只是在封裝以及接口外形有區(qū)別,測量精度方面無區(qū)別。

SBG Systems公司Ellipse-N慣性衛(wèi)星組合導航系統(tǒng)精度
安裝范圍:360°,無安裝限制
姿態(tài)(橫滾、俯仰)0.1° SP; 0.05 RTK; 0.03 PPK
航向:0.2° 單天線+ 動態(tài);0.1° PPK
升沉(海洋版):5cm 或5%;測量周期:0~15s
位置:1.2m SP;1m SBAS;1cm RTK/PPK+1ppm

SBG Systems公司Ellipse-N慣性衛(wèi)星組合導航系統(tǒng)特點

  • 極低噪音的陀螺儀(1)極低噪音的陀螺儀
  • 工業(yè)級GPS+GLONASS/北斗BEIDOU接收機
  • 可外接里程計等輔助設(shè)備
  • 1~200Hz 的數(shù)據(jù)輸出頻率
  • -40~85℃全溫范圍測試以及校準
  • 有眾多的測量運動模型可供選擇(飛機、無人機、車輛、船、重型機械等)

SBG Systems公司Ellipse-N慣性衛(wèi)星組合導航系統(tǒng)參數(shù)指標
(1)加速度計指標
參數(shù)                                                                           指標                                                                            備注
量程(g)                                            海洋:8,陸/空:20,高動態(tài):40                    Ellipse系列針對不同應(yīng)用有三種不同版本可選
標度因數(shù)穩(wěn)定性(ppm)                                             1000                                                                 一年加速老化后
非線性(ppm of FS)                                                 1500                                                                     zui佳配適直線
一年零偏穩(wěn)定性(mg)                                                 5                                                                         一年加速老化后

速度隨機游走(μg/√hz)                                             57
運行時零偏不穩(wěn)定性(μg)                                         14                                                                     Allan variance @ 25°C
VRE(震動整流誤差)(μg/g2)                                 50                                 測試的zui大有效值:A2 版為3g RMS;A3、A4 版為10g RMS
帶寬(Hz)                                                                390                                                                     內(nèi)部低通濾波器衰減<3dB
采樣率(kHz)                                                             4                                                                         高 級抗混疊FIR 濾波器
正交性(°)                                                                0.05


(2)陀螺儀指標
參數(shù)                                                                                指標                                                                            備注
量程(°/s)                                                        海洋:450;陸/空:450;高動態(tài):1000              Ellipse 針對不同的應(yīng)用有三中不同版本可選
標度因數(shù)穩(wěn)定性(ppm)                                                  500                                                                     一年加速老化后
非線性(ppm of FS)                                                         50
一年零偏穩(wěn)定性(°/s)                                                       0.4                                                                     一年加速老化后
角度隨機游走(°/√hr)                                                      0.18                                                                 Allan variance @ 25°C
運行時零偏不穩(wěn)定性(°/hr)                                                 8                                                                    Allan variance @ 25°C
VRE(震動整流誤差)(°/h/g2)                                         <1                                                                     zui大測試到10g RMS
帶寬(Hz)                                                                         133                                                                         內(nèi)部陀螺帶寬
采樣率(kHz)                                                                     10                                                                         高 級抗混疊FIR濾波器
正交性(°)                                                                         0.05

(3)磁力儀指標
參數(shù)                                                                                    指標                                                                            備注
量程(Gauss)                                                                    50
標度因數(shù)穩(wěn)定性(%)                                                         0.5
噪音(m Gauss)                                                                 3 頻率                                                                    1~25Hz
零偏穩(wěn)定性(m Gauss)                                                       1
帶寬(Hz)                                                                         22                                                                             3dB衰減
分辨率(m Gauss)                                                             1.5
采樣率(Hz)                                                                      100
正交性(°)                                                                         0.1                                                                         用戶磁校準之后

(4)內(nèi)部GNSS接收機指標
Ellipse-N / Ellipse-D內(nèi)部集成了GNSS 接收機(L1/L2 GPS、GLONASS、伽利略、北斗),能夠進行DGNSS、SBAS 和RTK 定位。Ellipse-D還具有雙天線航向,在具挑戰(zhàn)性的條件下提供穩(wěn)健和準確的航向角。該接收機具有5Hz 的刷新率,在惡劣的GPS 環(huán)境中提供很好的精度和可靠性。標準的原始數(shù)據(jù)輸出使其可以通過后處理實現(xiàn)很好性能。
參數(shù)                        指標                                                                            備注
信號跟蹤: GPS: L1C/A, L2C;GLONASS: L1OF, L2OF;GALILEO: E1, E5b;Beidou B1l, B2l;QZSS L1C/A, L2C;SBAS,所有星座和信號默認啟用
水平位置精度:單點L1/L2:1.5m;SBAS:1.0m;RTK:1cm+1ppm
速度精度:0.05 m/s RMS
真航向精度:0.55° 0.5m 基線;0.4° 1m 基線;0.3° 2m 基線                                                                僅Ellipse-D 適用
速度極限:500 m/s
第 一次定位時間:冷啟動:<24s;熱啟動:<2s
信號重捕:2s
輸出頻率:5Hz

差分修正:RTCM V3.3 通過任意串口發(fā)送



(5)內(nèi)部氣壓高度計指標
Ellipse-E,N 和D嵌入了MEMS壓力傳感器,用作高度計。這種壓力傳感器進行了全溫校準和溫度補償,使它成為精 確測量絕壓壓力的理想選擇。Ellipse使用標準大氣模型將絕壓壓力轉(zhuǎn)換為高度,假設(shè)高度上的溫度梯度恒定,海壓水平為1013,25百帕。
壓力傳感器                                                   參數(shù)                                                        備注
分辨率                                                        1.2Pa                                                 10 cm 分辨率
                                                                    ±50 Pa                                         相對-[25°C],700…1100 hPa
 壓力精度                                                     ±200 Pa                                         絕值-[0…50°C],450…1100 hPa
                                                                    ±350 Pa                                         對值-[-20…85°C],450…1100 hPa

長期穩(wěn)定性                                                  <100 Pa/yr
更新速率                                                        100 Hz

(6)外部里程計
Ellipse-E,N 和D 都支持里程計輔助輸入,可以大大提升具有挑戰(zhàn)性的環(huán)境(如城市峽谷)中的產(chǎn)品性能。即使在GPS 中斷的期間,里程也能提供可靠的速度信息。這大大提高了航位推算的準確性。Ellipse處理正交輸出或兼容的里程計,以支持前進和后退方向,它也能夠通過OBD-II 連接器(CAN 總線里程表)直接使用車輛的里程表。這使得Ellipse 成為自動駕駛汽車和無人駕駛車輛的出色慣性導航系統(tǒng),即使在非常密集的城市環(huán)境中也具有很高的精度。
注:里程計集成非常簡單,因為卡爾曼濾波器將精細地調(diào)整里程計的增益,并將糾正里程計對準和杠桿臂的殘余誤差。


SBG Systems公司Ellipse-N慣性衛(wèi)星組合導航系統(tǒng)機械參數(shù)規(guī)格
1. 機械參數(shù)
參數(shù)                                                 BOX版                                                                                    OEM版                                           
尺寸                                        46mm*45mm*24mm                                                     29.5mm*25.5mm*11mm                
重量                                                  49g                                                                                            17g                                                 
沖擊                                                           工作狀態(tài):100g 6ms,半正弦波;非工作:500g 0.1ms,半正弦波                                                         
操作震動                                                                 8g RMS – 20Hz to 2 kHz as per MIL-STD-810G 
外殼材質(zhì)                                       陽極氧化鋁                                                                             鋁,導電表面拋光                        
IP等級                                            IP68(1 小時@2 米)                                                                     N/A                                                     
操作溫度                                            -40~85℃                                                                             -40~78℃                     
存儲溫度                                                                                        -40~85℃
濕度                                               密封,無限制
MTBF(平均故障時間)                                                                                        50000 小時
校準周期                                                                       不需要,免維護


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