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| resources:eval:user-guides:inertial-mems:imu:adis16448 [26 Jan 2014 23:29] – [PHYSICAL SETUP] Mark Looney | resources:eval:user-guides:inertial-mems:imu:adis16448 [10 Jul 2018 20:45] – [In-run Bias Stability] Motoko Hunt |
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| {{:resources:eval:user-guides:inertial-mems:imu:448-hook-up-with-ep2.png?nolink&400|}} | {{:resources:eval:user-guides:inertial-mems:imu:448-hook-up-with-ep2.png?nolink&400|}} |
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| ===== ADIS1644x/PCB BREAKOUT BOARD ===== | ===== ADIS1644X/FLEX BREAKOUT BOARD ===== |
| For those who are on a tight timeline, connecting the ADIS16445 or [[adi>ADIS16448|ADIS16448]] to an embedded controller will provide the most flexibility in developing application firmware and will more closely reflect the final system design. The [[adi>en/mems-sensors/mems-inertial-measurement-units/adis16448/products/EVAL-ADIS16448/eb.html|ADIS16448/PCBZ]] is the breakout board for the [[adi>ADIS16448|ADIS16448]] and may provide assistance in the process of hooking it up to an existing embedded processor system. The ADIS16445 has not be released yet, but it will also provide a similar function, using the part number: ADIS16445/PCBZ. For more information on the [[adi>en/mems-sensors/mems-inertial-measurement-units/adis16448/products/EVAL-ADIS16448/eb.html|ADIS16448/PCBZ]] breakout boards, check out the following link: [[adi>en/mems-sensors/mems-inertial-measurement-units/adis16448/products/EVAL-ADIS16448/eb.html|ADIS16448/PCB Breakout Board Web Page]]. | The ADIS1644X/FLEX provides a direct connection path between any of the ADIS1644x models and J4 on the EVAL-ADIS evaluation system. This accessory used to be part of the ADIS16334/PCBZ, ADIS16445/PCBZ and ADIS16448/PCBZ kits, but is now available for purchase as a separate accessory. |
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| ===== EVAL-ADIS: PC EVALUATION ===== | ===== EVAL-ADIS: PC EVALUATION ===== |
| [[adi>EVAL-ADIS|EVAL-ADIS]] | [[adi>EVAL-ADIS|EVAL-ADIS]] |
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| [[adi>en/mems-sensors/mems-inertial-measurement-units/adis16448/products/EVAL-ADIS16448/eb.html|ADIS16448/PCBZ]] or ADIS16445/PCBZ | [[adi>adis16448|ADIS16448BMLZ]] or [[adi>adis16445|ADIS16445BMLZ]] |
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| | [[adi>en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/EVAL-ADIS1644X.html|ADIS1644X/FLEX]] |
| ===== SYSTEM REQUIREMENTS ===== | ===== SYSTEM REQUIREMENTS ===== |
| Windows XP, Vista, 7 | Windows XP, Vista, 7 |
| {{:resources:eval:user-guides:inertial-mems:imu:adis16488-gyro-accel-noise-test-01.png?nolink&500|}} | {{:resources:eval:user-guides:inertial-mems:imu:adis16488-gyro-accel-noise-test-01.png?nolink&500|}} |
| ====In-run Bias Stability==== | ====In-run Bias Stability==== |
| For the [[adi>ADIS16448|ADIS16448]] gyroscopes and acceleroemeters, "In-run Bias Stability" refers to the best resolution available, when averaging sequetital, time domain data. This has a direct impact on the accuracy of a bias correction and therefore, has a direct impact on angle measurement drift. In reviewing the Allan Variance curve for the gyroscopes ([[adi>http://www.analog.com/static/imported-files/data_sheets/ADIS16448.pdf#Page=08|Figure 7]]), the minima of the the best performance curve (//mean - 1 sigma//) is associated with an integration time of ~100 seconds. However, many of the units (from //mean// and //mean + 1 sigma// curves)) start approaching their minima at ~40 seconds. While selecting the best settings may require some iteration, this exercise starts with an integration of 40 seconds, an output data rate of 51.2 SPS (SMPL_PRD = 0x0401) and a dyanmic range of +/-250 degrees/second (SENS_AVG = 0x0104). | For the [[adi>ADIS16448|ADIS16448]] gyroscopes and acceleroemeters, "In-run Bias Stability" refers to the best resolution available, when averaging sequetital, time domain data. This has a direct impact on the accuracy of a bias correction and therefore, has a direct impact on angle measurement drift. In reviewing the Allan Variance curve for the gyroscopes ([[adi>static/imported-files/data_sheets/ADIS16448.pdf#Page=08|Figure 7]]), the minima of the the best performance curve (//mean - 1 sigma//) is associated with an integration time of ~100 seconds. However, many of the units (from //mean// and //mean + 1 sigma// curves)) start approaching their minima at ~40 seconds. While selecting the best settings may require some iteration, this exercise starts with an integration of 40 seconds, an output data rate of 51.2 SPS (SMPL_PRD = 0x0401) and a dyanmic range of +/-250 degrees/second (SENS_AVG = 0x0104). |
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| Here is a snapshot of the **Data Access** and **Data Capture** screens, which configures the software to take 50 sets of z-axis gyroscope data, that contain 40-second time records each, at a read rate of 51.2SPS. | Here is a snapshot of the **Data Access** and **Data Capture** screens, which configures the software to take 50 sets of z-axis gyroscope data, that contain 40-second time records each, at a read rate of 51.2SPS. |
