Vehicular present position detection apparatus and program storage medium
US7983842B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 2008 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | Jan 28, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There is a need for improving the accuracy of estimating a gain error for an angular velocity sensor. An error estimation section and a correction section are provided as well as a gyroscope that detects an angular velocity of a vehicle. The error estimation section assumes the gain error of the gyroscope to be a state quantity and finds an estimated value for the gain error using a Kalman filter. Based on the gain error found by the error estimation section, the correction section corrects a gain correction amount used for gain correction of values detected by the gyroscope. The correction section corrects the gain correction amount dedicated to right turn based on the gain error found by the error estimation section when the vehicle is assumed to turn right. The correction section corrects the gain correction amount dedicated to left turn based on the gain error found by the error estimation section when the vehicle is assumed to turn left.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.