Table 1 A summary of IMUs classification as per performance, from [1]
From: Inertial sensors technologies for navigation applications: state of the art and future trends
Grade | Strategic grade | Navigation grade | Tactical grade | Commercial gradea |
|---|---|---|---|---|
Positional error | 30–100 m/h | 1 nmib/h or 0.5 m/s | 10–20 nmi/h | Large variation |
Gyroscope drift | 0.0001–0.001°/h | < 0.01°/h | 1–10°/h | 0.1°/s |
Gyroscope random walk | – | \(< 0.002^\circ /\sqrt {\text{h}}\) | 0.05– < 0.02 \(^\circ /\sqrt {\text{h}}\) | Several \(^\circ /\sqrt {\text{h}}\) |
Accelerometer bias | 0.1–1 μg | < 100 μg | 1–5 mg | 100–1000 μg |
Applications | Submarines Intercontinental ballistic missiles | General navigation High precision georeferencing Mapping | Integrated with GPS for mapping Weapons (Short time) | Research Low cost navigation Pedometers Anti-locking breaking Active Suspension Airbags |
Cost | ~ $1 million | ~ $100,000 | ~ $2000–$50,000 | $1 for accelerometers $10 for gyroscopes |