Triaxial MEMS accelerometer inertial navigation

In summary, Carlos C. is seeking help from the community to solve an issue with measuring differences in acceleration on the Z axis using a platform with 16 MEMS accelerometers. While it works perfectly in static mode, the platform's movement along a unidirectional path causes disturbances in the Z measurements. Carlos C. is looking for a way to remove these accelerations and obtain accurate Z values.
  • #1
Carlos C.
1
0
Hi all!
I have a question that maybe some people of this great comunity can help.
I´m working with a platform with 16 MEMS accelerometers distributed along the whole surface with a knew position and orientation, I have to measure the differences in acceleration on the Z axis, to get the surface defined by the accelerometers. It works perfectly in static mode.
The problem is that this platform should measure at the same time that the platform is traveling along a unidirectional way. Then the accelerations induced to ride the platform disturbs the Z measurements, and maintain a constant velocity (acc=0) is not possible.
Is there a way to remove this accelerations from the measurements to get a "clean" Z values?
Thanks a lot to everyone!
Carlos C.
 
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  • #2
Thanks for the post! Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
 

5 Most Frequently Asked Questions About Triaxial MEMS Accelerometer Inertial Navigation

1. What is a triaxial MEMS accelerometer?

A triaxial MEMS (Microelectromechanical Systems) accelerometer is a sensor that measures acceleration in three axes (x, y, and z) simultaneously. It consists of a tiny cantilever beam with a proof mass attached to it, which moves in response to acceleration. This displacement is measured by capacitive or piezoresistive sensors to determine the acceleration forces acting on the sensor.

2. How does a triaxial MEMS accelerometer work for inertial navigation?

A triaxial MEMS accelerometer can be used in inertial navigation systems to measure changes in velocity and position. It works by continuously measuring acceleration in three axes and integrating these values to determine velocity. By further integrating velocity, it can calculate the position of the sensor over time. This data can then be used for navigation purposes.

3. What are the advantages of using a triaxial MEMS accelerometer for inertial navigation?

One of the main advantages of using a triaxial MEMS accelerometer for inertial navigation is its small size and low cost. As a MEMS device, it can be manufactured using microfabrication techniques, making it compact and affordable. It also has a high level of accuracy and can operate in harsh environments, making it suitable for various navigation applications.

4. What are the limitations of triaxial MEMS accelerometers for inertial navigation?

One limitation of triaxial MEMS accelerometers for inertial navigation is their reliance on accurate initial position and velocity data. Any errors in these values can accumulate over time and affect the accuracy of the navigation. They are also susceptible to drift and noise, which can also impact their performance. Additionally, they may not be suitable for long-term navigation applications due to their limited battery life.

5. How are calibration and compensation handled in triaxial MEMS accelerometers for inertial navigation?

To ensure accurate measurements, triaxial MEMS accelerometers are calibrated before use. This involves applying known acceleration forces to the sensor and adjusting its output accordingly. Compensation techniques, such as temperature compensation, are also used to minimize errors caused by external factors. In some cases, a combination of calibration and compensation may be used to improve the accuracy of the sensor.

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