NevadaMark

New Article: Designing for Low-Noise Feedback with MEMS Gyros

Discussion created by NevadaMark Employee on Apr 9, 2016

Hello Everyone!

We have just posted a brand new-article.  Here is a direct link to the article, along with its abstract, for those who are interested.  We look forward to your questions and feedback!

http://www.analog.com/media/en/technical-documentation/technical-articles/Designing-for-Low-Noise-Feedback-Control-with-…

ABSTRACT

MEMS gyroscopes offer a simple way to measure angular rate of rotation, in packages that easily attach to printed circuit boards, so they are a popular choice to serve as the feedback sensing element in many different types of motion control systems. In this type of function, noise in the angular rate signals (MEMS gyroscope output) can have a direct influence over critical system behaviors, such as platform stability and is often the defining factor in the level of precision that a MEMS gyroscope can support. Therefore, “low-noise” is a natural, guiding value for system architects and developers as they define and develop new motion control systems.  Taking that value (low-noise) a step further, translating critical system-level criteria, such as pointing accuracy, into noise metrics that are commonly available in MEMS gyroscope datasheets, is a very important part of early conceptual and architectural work.  Understanding the system’s dependence on gyroscope noise behaviors has a number of rewards, such as being able to establish relevant requirements for the feedback sensing element or, conversely, analyzing the system-level response to noise in a particular gyroscope.  Once system designers have a good understanding of this relationship, they can focus on mastering the two key areas of influence that they have over the noise behaviors in their angular rate feedback loops: (1) developing the most appropriate criteria for MEMS gyroscope selection and (2) preserving the available noise performance throughout the sensor’s integration process.

Outcomes