AMG-LP Low-Profile Direct-Drive Gimbals

Description

Design Features

  • Continuous 360 degree rotation of azimuth and elevation including built-in slip ring
  • High accuracy angular position and rate capability
  • Direct-drive brushless servomotors result in zero backlash
  • Cog-free design for outstanding velocity stability
  • Accommodate loads up to 200 mm in diameter
  • Low maintenance and high reliability provide the lowest cost of ownership

Aerotech's AMG-LP (Low Profile) position and rate gimbal mounts provide ultra-precise angular position, rate, and acceleration for development and production testing of a wide range of systems. The AMG-LP series is ideal for directing optics, lasers, antennas, and sensors at high speed to precise pointing angles. Typical applications include missile seeker test and calibration, electro-optical sensor and FLIR testing, optical testing of sensors in a vacuum, and angular testing of inertial sensors such as gyros, MEMS, and accelerometers. The AMG-LP gimbal provides high performance at an affordable price. The finest quality motors, bearings, and encoders are integrated into precision-machined housings to ensure peak performance.

Low Profile

By incorporating our low-profile direct-drive rotary stages, the AMG-LP series is capable of speeds and accelerations that are significantly higher than other competing products of this size. These gimbals have a lower profile compared to competing products within given torque ranges. This results in a smaller and more effective gimbal for many applications where beam height and chamber volume are of utmost concern.

Accurate 360° Positioning and Rate Generation

Direct-drive brushless torque motors, with rare-earth magnets and high-accuracy angular transducers are coupled directly to precision shafts for accurate and smooth 360° continuous motion. The absence of gear trains and other drive mechanisms eliminates position error contributions due to mechanical hysteresis and backlash. Directly-coupled high-resolution position feedback devices ensure highly accurate and repeatable positioning.

A wide range of performance feedback grades is available. Typical line gimbal resolution ranges from 0.87 to 0.32 µrad with Aerotech controls. A built-in azimuth slip ring provides for continuous rotation with no cable wrap-up.

Mirror and Alternate Payload Accommodation

A variety of mirror cell diameters are available for standard optic applications. We also provide for custom payload attachment solutions for various device interfaces. Each gimbal mirror cell can be modified or replaced with different shaped cells to accommodate sensors or other odd shaped payloads.

Direct-Drive Motors for Outstanding Control

To maximize positioning and velocity performance, AMG-LP gimbal mounts utilize Aerotech’s high torque S-series brushless, slotless servomotors. These motors have all of the advantages of a brushless direct-drive motor — no brushes to wear, no gear trains to maintain, high acceleration, and high speeds. Since it is a slotless, ironless design, there is zero cogging, meaning there is absolutely no torque ripple. This results in smoother motion throughout travel and more precise positioning. These motors are available in different winding configurations to work with high- or low-voltage power supplies.

Specifications

AMG-LP Specifications

ModelAMG100LPAMG150LPAMG200LP
Travel 360° Continuous, AZ/EL
Maximum Bus Voltage 340 VDC
Maximum Torque (Continuous) Azimuth 2.36 N·m 2.36 N·m 5.99 N·m
Elevation 0.48 N·m 0.48 N·m

2.36 N·m

Clear Aperture Diameter 95 mm 144.3 mm 193.8 mm
Accuracy(1) ±24 µrad to ±192 µrad (±5 to ±40 arc sec)
AZ Repeatability(2) 19.4 µrad (4 arc sec)
EL Repeatability(2) 14.5 µrad (3 arc sec) 19.4 µrad (4 arc sec)
Maximum Rotary Speed(3) 100 rpm
Maximum Load Capability 6.8 kg 16 kg
Axis Wobble 97 µrad (20 arc sec)
Orthogonality 72 µrad (15 arc sec)
Standard Finish Black Anodize with Hard-Coated Cell
Max Component Diameter 103 mm 153.7 mm 205 mm
Nominal Component Thickness 19 mm 30 mm 40.9 mm
Mass (Without Mirror) 9.5 kg 11.1 kg 21.5 kg
Inertia AZ(4) 0.038 kg-m2 0.071 kg-m2 0.24 kg-m2
Inertia EL(4) 0.001 kg-m2 0.0038 kg-m2 0.012 kg-m2
Height to Mirror Centerline 181 mm 220 mm 254 mm
  1. ±24 µrad calibrated (HALAR); ±192 µrad uncalibrated.
  2. Repeatability and accuracy are dependent on encoder resolution. To achieve the listed specifications, encoder resolution must be 0.36 arc sec or less.
  3. Maximum speed based on stage capability; maximum application velocity may be limited by system data rate and system resolution.
  4. Unloaded inertia.

Dimensions

  • AMG100LP
  • AMG150LP
  • AMG200LP

Ordering Information

AMG-LP Low Profile Direct-Drive Gimbals

Option Description
AMG-100 AMG100 low-profile direct-drive gimbal
AMG-150 AMG150 low-profile direct-drive gimbal
AMG-200 AMG200 low-profile direct-drive gimbal

Feedback (Required)

Option Description
-E1 Incremental encoder, 1 Vpp
-E2 Incremental encoder, TTL, x5 interpolation
-E3 Incremental encoder, TTL, x10 interpolation
-E4 Incremental encoder, TTL, x25 interpolation
-E5 Incremental encoder, TTL, x50 interpolation

Metrology (Required)

Option Description
-PL1 Metrology, uncalibrated with performance plots
-PL2 Metrology, calibrated (HALAR) wtih performance plots

Integration (Required)

Aerotech offers both standard and custom integration services to help you get your system fully operational as quickly as possible. The following standard integration options are available for this system. Please consult Aerotech if you are unsure what level of integration is required, or if you desire custom integration support with your system.
-TAS Integration - Test as system
Testing, integration, and documentation of a group of components as a complete system that will be used together (ex: drive, controller, and stage). This includes parameter file generation, system tuning, and documentation of the system configuration.
-TAC Integration - Test as components
Testing and integration of individual items as discrete components. This is typically used for spare parts, replacement parts, or items that will not be used or shipped together (ex: stage only). These components may or may not be part of a larger system