Overview of stabilizers and models

First, stabilizers are mechatronic systems that enable ships or submarines to establish uplink and downlink radio links with geostationary or geosynchronous satellites. Specifically, they control parabolic reflectors with diameters ranging from 400 mm to 2,500 mm.

In addition, to meet these needs, Cegelec Défense Mechatronics Solutions (CDMS) offers several product types. Consequently, these include the compact SNC naval stabilizers and the SNA servo-controlled naval stabilizers, which are selected based on the diameter of the telecommunications antenna.

For instance, the SNC400, SNC750, and SNC1000 models support antennas with diameters of 400 mm, 750 mm, and 1,000 mm respectively. On the other hand, the SNA1500, SNA2000, and SNA2500 models carry larger antennas measuring 1,500 mm, 2,000 mm, and 2,500 mm.

SNC-type compact naval stabilizers

SNC-type compact naval stabilizers are three-axis systems, comprising yaw, roll, and pitch. They are equipped with an electrical distributor and a rotary joint allowing continuous rotation of the yaw axis. The stabilizer’s attitude is measured by an inertial measurement unit (IMU) integrated into the mechanical system.

SNA-type servo-controlled naval stabilizers

SNA-type servo-controlled naval stabilizers are based on a patented mechanism that enables continuous pointing of an antenna within a 220° sphere, without dead spots or singular positions. Combined with inertial sensors and an electronic control unit, this system offers a high-precision solution. This cost-optimized solution meets antenna stabilization needs on any type of vessel.

Kinematic configuration and antenna connection

The chosen kinematic configuration requires neither an electric rotary joint nor a microwave rotary joint. Instead, the connection to the antenna is provided by a coaxial cable or a flexible waveguide. Furthermore, available space at the rear of the antenna allows, if necessary, for the integration of the transmitter. This design fully complies with onboard mass constraints.

Stabilizer suspension and travel

The stabilizer is mounted on a three-axis damped suspension. In this case, it features limited travel to accommodate the available space inside the radome.

Mechanical design and components

In terms of design, certain mechanical parts of the SNA and SNC models are cast from aluminum, while all components are CNC-machined. Naturally, their protective coatings are suitable for marine environments.

Component selection and reliability

Finally, the components are selected to meet the demanding conditions of the maritime environment and ensure high reliability. For instance, the system incorporates high-energy magnet servo motors. It features robot-type gearboxes with lifetime lubrication, waterproof angular sensors, and waterproof connectors.