The IF3700 is a high-performance inertial navigation system leveraging a closed-loop fibre-optic gyroscope and high-precision quartz accelerometer for superior stability and autonomy. Designed to serve as a primary navigation unit for large unmanned aerial vehicles (UAVs), unmanned surface vessels (USVs) and unmanned submarines (UUVs), the IF3700 fulfils demanding defense-grade positioning, attitude and heading requirements without reliance on external aids. It supports self-alignment, long-duration attitude/heading retention and is built for avionics, aerospace and sea-borne navigation environments.
With internal fibre-optic gyroscopes offering bias stability of 0.01°/h and quartz accelerometers with zero bias stability ≤ 20 µg, the unit delivers inertial-only attitude and heading accuracy while also supporting GNSS/INS fusion when required. It features ruggedized supply, interface flexibility (RS-232, RS-422, CAN, Ethernet, USB), update rates up to 800 Hz and an IP65 enclosure built for shock, vibration and temperature extremes. For system integrators in the military navigation domain, the IF3700 brings a proven architecture with high availability, minimal external dependence and expandable integration for land, air and maritime unmanned systems.
Key features include:
- Closed-loop fibre-optic gyroscope: ≤ 0.01°/h bias stability over full temperature.
- Quartz accelerometer: ≤ 20 µg zero bias stability (GJB, 1σ) with ±30 g range.
- Pure inertial heading retention: ≤ 0.01° (RMS, 1 h) without external input.
- Attitude accuracy (inertial): roll/pitch ≤ 0.005° (RMS, 1 h). memsmag.com
- GNSS/INS fusion option: Position single point ≤ 1.2 m (RMS); velocity ≤ 0.02 m/s (RMS) when GNSS aided.
- Ruggedized hardware: 28 V supply, ≤ 35 W power consumption, working temperature –40 °C to +60 °C, IP65 rated.
- Interfaces: 1 × RS-232, 4 × RS-422, 1 × CAN, 1 × Ethernet, 1 × USB. Update rate up to 800 Hz.
