Tactical-Grade MEMS IMU a Form-Fit Replacement for Widely Deployed RLG IMU - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

Tactical-Grade MEMS IMU a Form-Fit Replacement for Widely Deployed RLG IMU

EMCORE Corporation, a provider of advanced mixed-signal products for aerospace, defense and broadband communications markets, introduced its new SDI170 quartz micro-electromechanical Systems (MEMS) tactical grade inertial measurement unit (IMU). The SDI170 is designed as a form, fit, and function compatible replacement for the HG1700-AG58 Ring Laser Gyroscope (RLG) IMU.

The unit is designed for a wide range of high-precision, integrated commercial and defense applications including aircraft AHRS (Attitude Heading Reference Systems), GPS-aided navigation, ground surveying, mobile mapping, ROVs, autonomous vehicles, tactical weapons, and stabilization platforms.

With excellent overall performance, versatility, and a high MTBF (Mean Time Before Failure) rating over ruggedized environments, the SDI170 is ideal for continuous use applications with no wear-out components. It delivers highly linear accelerometer performance and long life.

It is non-ITAR (International Traffic in Arms Regulations) controlled and has completed extensive internal and external customer testing to confirm compatibility to replace legacy products.

EMCORE’s SDI170 IMU performs in highly dynamic ±1,074 deg/sec and ±50 G standard (±70 G optional) linear acceleration conditions and delivers 1°/hr gyro bias and 1 mg accelerometer bias stability with very low 0.02°/√hr Angle Random Walk (ARW) over a wide -55 °C to +85 °C temperature range in vibration environments.

The SDI170’s tactical performance is based on the dependable, accurate quartz MEMS inertial sensor technology in EMCORE’s SDI500 tactical grade IMU 1. EMCORE’s quartz technology enables repeatable high-volume production of precisely machined sensor structures combined with the inherent large signal output and thermal stability of quartz materials.

In addition to EMCORE’s latest generation solid-state hermetically sealed quartz gyroscopes and accelerometers, the SDI170 IMU communicates using the high-speed SDLC protocol over the industry-standard RS-422 electrical interface for seamless compatibility and outstanding precision performance. With continuous BIT (Built-in Test) monitoring and EMI (Electromagnetic Interference) protection designed into a compact 33 cubic inch package, EMCORE’s SDI170 will provide reliable 20-year operating and storage life without calibration in demanding, mission-critical environments.