Abstract
The calibration of micro inertial measurement units is important in ensuring the precision of navigation systems, which are equipped with microelectromechanical system sensors that suffer from various errors. However, traditional calibration methods cannot meet the demand for fast field calibration. This paper presents a fast field calibration method based on the Powell algorithm. As the key points of this calibration, the norm of the accelerometer measurement vector is equal to the gravity magnitude, and the norm of the gyro measurement vector is equal to the rotational velocity inputs. To resolve the error parameters by judging the convergence of the nonlinear equations, the Powell algorithm is applied by establishing a mathematical error model of the novel calibration. All parameters can then be obtained in this manner. A comparison of the proposed method with the traditional calibration method through navigation tests shows the classic performance of the proposed calibration method. The proposed calibration method also saves more time compared with the traditional calibration method.
Highlights
Inertia technology includes inertia sensors, inertial navigation, inertial guidance, inertial measurement, and inertial stability
The biases and scale factors of microelectromechanical system (MEMS) inertial sensors drift with time variation in micro inertial measurement units
This condition will have a definitive effect on navigation performance
Summary
Inertia technology includes inertia sensors, inertial navigation, inertial guidance, inertial measurement, and inertial stability. As a novel type of a strapdown inertial navigation system (SINS), micro inertial navigation has inherited almost all merits of the traditional SINS: completely autonomous; highly secure, which is very important in military applications; free of electromagnetic interference; and available and flexible under all weather conditions. It has the following unparalleled advantages over the traditional SINS: small size, light weight, low cost, low power consumption, long lifetime, high reliability, wide dynamic range, fast response, and ease of installation and commissioning. Micro inertial measurement unit (MIMU) has become a hot research topic [2,3,4] and an important direction of the development of inertial technology for commercial and military fields [5]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
