Using Multiple MEMS IMUs to Form a Distributed Inertial Measurement Unit - Softcover

Hanson, Ryan D

Softcover

ISBN 10: 1025095359 ISBN 13: 9781025095356

Publisher: Hutson Street Press, 2025

Synopsis

MEMS IMUs are readily available in quantity and have extraordinary advantages over conventional IMUs in size, weight, cost, and power consumption. However, the poor performance of MEMS IMUs limits their use in more demanding military applications. It is desired to use multiple distributed MEMS IMUs to simulate the performance of a single, more costly IMU, using the theory behind Gyro-Free IMUs. A Gyro-Free IMU (GF-IMU) uses a configuration of accelerometers only to measure the three accelerations and three angular rotations of a rigid body in 3-D space. Theoretically, almost any configuration of six distributed accelerometers yields sufficient measurements to solve for the translational and angular acceleration. In reality, however, sensor noise corrupts the measurements and good sensor geometry is necessary to obtain an accurate estimate of the translational and angular accelerations. Determining the optimal configuration of accelerometers is an exercise in geometry. This thesis investigates the optimal geometry of an INS constructed of multiple networked IMUs and develops the accompanying mechanization and error equations. Simple simulations are run to test and validate the basic design principles.

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Edition details

• Publisher: Hutson Street Press
• Publication date: 2025
• Language: English
• ISBN 10: 1025095359
• ISBN 13: 9781025095356
• Binding: Paperback
• Number of pages: 106