PR 81-0614-26 Salient Characteristics- 18m ACU Upgrade.docx
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- Solicitation number
- N00173-26-RFI-GD01
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This is a Salient Characteristics document specifying technical requirements for a Model 990 Antenna Control System (ACS) upgrade to support an 18-meter antenna terminal. The Naval Research Laboratory intends to award a firm-fixed-price purchase order to CPI Satcom & Antenna Technologies Inc. in Plano, Texas for one ACS unit with associated equipment and installation under FAR 12.102 as a sole source procurement. The requirement is justified by the need for technical compatibility with the facility's existing twin AN/FSC-78 Antenna System hardware and software network architecture already in operation.
The ACS must control four brushless DC permanent magnet motors (two 40 HP motors for azimuth and two 10.6 HP motors for elevation) capable of tracking up to 10 degrees per second with elevation movement up to 85 degrees, utilizing Kollmorgen variable speed motor controllers and dual Heidenhain Position Encoders with 25-bit resolution and ±20 arc-second accuracy. The system architecture requires DSP servo loop closures and QNX Real Time Operating System management located in a stainless steel NEMA-4X rated Power Drive Unit cabinet, with redundant fail-safe interlock logic and safety-rated relays for emergency stop functionality. The Antenna Control Unit must feature a 15-inch touchscreen LCD display supporting multiple operational modes including Tracking (Optrack, Steptrack, Monopulse), Pointing (StarTrack, Preset, Designate, NORAD, Table Track), and Maintenance functions, with NTP/IRIG-B/1PPS time synchronization. The system must include a Portable Maintenance Unit for manual backup control and redundant logic components (additional Antenna Control Board, Expansion Board, PLC Arbitrator, T-Bar Relay, and Power Supplies) to ensure antenna control capability during primary control board failure.
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SALIENT CHARACTERISTICS
Model 990 Antenna Control System
Antenna Control System must be technically compatible with and capable of controlling a AN/FSC-78 system: a full motion, large aperture 18m antenna terminal capable of tracking up to 10 degrees/sec in azimuth and elevation up to 85 degrees.
Antenna Control System must be capable of controlling a total of four brushless DC motors: 2, 40 HP in azimuth and 2, 10.6 HP in elevation.
All four brushless DC motors must be permanent magnet type with torque source to control the antenna to zero RPM.
All four DC motors must provide DC tachometer, virtual tachometer, and incremental encoder motor rate feedback.
Antenna Control System must use Kollmorgen motor controllers, variable speed.
Position encoder must be two, Heidenhain Position Encoders with 25 Bit Resolution and +/-20 Arc-Second accuracy per revolution.
DSP servo loop closures must be located in the Power Drive Unit and managed by QNX Real Time Operating System.
CPU logic must be located in the Power Drive Unit.
A drive isolation transformer must be part of the Antenna Control System.
Power Drive Unit cabinet must be stainless steel, NEMA-4X rated enclosure.
Power Drive Unit must have redundant, fail-safe interlock logic to immediately disable drives upon an axis or system fault, safety rated relays that interface directly to emergency stop switches, and soft stop logic for non-emergency stops (issues zero rate command and allows motors to gradually decelerate prior to disabling the axis).
Antenna Control Unit display must be 15” touch screen LCD color display with Az/El actual and commanded positions, currently selected modes/states, summary fault indicator and individual status and fault message display.
Antenna Control Unit operations modes must include Tracking (Optrack, Steptrack, Monopulse), Pointing (StarTrack, Preset, Designate, NORAD, Table Track), and Other (Maintenance, Manual, Stop, Computer, Simulator).
Antenna Control Unit must be time synchronized via NTP, IRIG-B, or 1PPS.
Antenna Control System must include a Portable Maintenance Unit that provides manually commanded, bi-directional control of all axes, hand held, backup means of moving antenna and ACU independent, four line 20 character display for axis positions, mode, and scrolling status messages, modes to include position jog and hi/lo variable speed, and a function to enable/disable the antenna per axis.
Antenna Control System must include Power Drive Unit Logic redundancy to provide antenna control in case of primary antenna control board failure. Redundant component must include an additional Antenna Control Board, Expansion Board, PLC Arbitrator, T-Bar Relay, and associated Power Supplies.
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