Performance Enhancement of Consumer-Grade MEMS Sensors through Geometrical Redundancy

The paper deals with performance enhancement of low-cost, consumer-grade inertial sensors realized by means of Micro Electro-Mechanical Systems (MEMS) technology. Focusing their attention on the reduction of bias instability and random walk-driven drift of cost-effective MEMS accelerometers and gyro...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2021-07, Vol.21 (14), p.4851
Main Authors: de Alteriis, Giorgio, Accardo, Domenico, Conte, Claudia, Schiano Lo Moriello, Rosario
Format: Article
Language:English
Subjects:
accelerometer
Accelerometers
Accuracy
Aircraft
Allan variance
Attitude stability
Bias
Calibration
GNSS/INS
gyroscope
inertial measurement unit
inertial navigation systems
Inertial platforms
Internet of Things
Low cost
Mechanical systems
Microelectromechanical systems
Random walk
Sensors
Standard deviation
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Summary:The paper deals with performance enhancement of low-cost, consumer-grade inertial sensors realized by means of Micro Electro-Mechanical Systems (MEMS) technology. Focusing their attention on the reduction of bias instability and random walk-driven drift of cost-effective MEMS accelerometers and gyroscopes, the authors hereinafter propose a suitable method, based on a redundant configuration and complemented with a proper measurement procedure, to improve the performance of low-cost, consumer-grade MEMS sensors. The performance of the method is assessed by means of an adequate prototype and compared with that assured by a commercial, expensive, tactical-grade MEMS inertial measurement unit, taken as reference. Obtained results highlight the promising reliability and efficacy of the method in estimating position, velocity, and attitude of vehicles; in particular, bias instability and random walk reduction greater than 25% is, in fact, experienced. Moreover, differences as low as 0.025 rad and 0.89 m are obtained when comparing position and attitude estimates provided by the prototype and those granted by the tactical-grade MEMS IMU.
ISSN:1424-8220
1424-8220
DOI:10.3390/s21144851