Discover how Micro-Magic’s integrated navigation systems leverage wheel speed sensors to enhance Inertial Navigation Systems (INS) performance, ensuring reliable vehicle navigation even in GPS-denied environments like tunnels or underground areas. Find out more > >
I3500 Inertial Navigation System from Micro-Magic.
In the evolving landscape of autonomous systems and advanced navigation technology, wheel speed sensors are proving to be indispensable allies to Inertial Navigation Systems. Commonly used as auxiliary inputs, these sensors play a critical role in enhancing accuracy and reducing the cumulative errors that can plague inertial sensors over time.
A new article on from Mirco Magic explores how wheel speed sensors provide independent, real-time vehicle speed data by measuring wheel rotation—factoring in tire radius and slip ratios. This data becomes vital when GNSS signals are unavailable, such as in tunnels or dense urban environments. By integrating wheel speed data into dead reckoning calculations, INS can maintain accurate navigation, even in signal-degraded scenarios.
The article dives into the mechanics of how wheel speed differences between the left and right wheels can be used to estimate heading changes, providing crucial compensation for inertial system drift. It also addresses real-world challenges like asymmetric wheelbases, tire slippage, and dynamic driving conditions, offering insight into how multi-sensor fusion and Kalman filtering techniques help mitigate these issues.
A practical case study of the I3500 integrated GNSS/INS system from Micro-Magic illustrates how commercial systems are already leveraging these capabilities to output precise navigation data in real time.
