Vertical Reference Gyro VRS-E132-1AD
Single Axis (VRS-E132-1AD)

Solid State Vertical Reference

VRS-E132-1AD
VRS-E232-1AD

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Description:

The Watson Industries Vertical Reference System is a solid-state gyro package used to measure angular displacement and rate, especially where dynamic motion may interfere. Under these conditions, the effects of lateral accelerations severely limit the performance of an ordinary accelerometer or pendulous device. The Watson Vertical Reference achieves improved performance by integrating the output of a vibrating structure gyro to get an estimate of the attitude, which is then compared to the output of conventional accelerometers to find the error. This error is then filtered over a long time constant and subtracted from the rate gyro output to correct biases as a closed loop error correction system. This system lets the gyro dominate the attitude accuracy above the correction loop frequency while the accelerometer reference dominates the lower frequencies.

Vertical Reference VRS-E132-1AD System Diagram
Vertical Reference VRS-E132-1AD System Diagram

The Watson Vertical Reference can be a functional replacement for mechanical vertical gyros, which are often more expensive and less reliable than this solid-state sensor. The Vertical Reference System is especially suited for applications where there is limited bank and elevation such as ships, underwater vehicles, some land vehicles, and certain camera applications. This is because the VRS uses a linear coordinate system. For better performance, a full three axis system, with either an Euler or Quaternion coordinate system would be required. Consult the factory about your application.

Applications:

The VRS is used to stabilize and control ships and submersibles, to stabilize antenna platforms, to instrument automobiles, and for many other applications.

Features:

Solid State, Strapdown System
High Accuracy
Low Cost, Low Power
Rugged, High Reliability
Analog and RS-232 Digital Outputs
Two Year Limited Warranty
Engineering Support

Vertical Reference
VRS-E232-1AD / VRS-E132-1AD
Specifications

Attitude

Single AxisDual Axis
Range: BankNot available±75° (±30°)Digital (Analog)
Range: Elevation±75° (±50°)±75° (±30°)Digital (Analog)
Resolution:0.02°0.02°Binary mode (14 bit)
Analog Scale Factor:5°/V3°/V±10V Output
Accuracy: Static±0.3°±0.3°
*Accuracy: Dynamic±2%±2%

Angular Rate

Range: RollNot available±100°/sec
Range: Pitch±100°/sec±100°/sec
Resolution:0.01°/sec0.01°/secBinary mode (14 bit)
Analog Scale Factor:10°/sec/V10°/sec/V±10V Output
Scale Factor Accuracy:1%1%
Bias: RollNot available< ±0.02°/sec
Bias: Pitch< ±0.02°/sec< ±0.02°/sec
Non-Linearity:< 0.03%< 0.03%Full scale range
Bandwidth:20 Hz20 Hz

Acceleration

Range: X, Y, Z±10g±10g
Resolution:4mg4mg
Analog Scale Factor:1g/V1g/V±10V Output
Scale Factor Accuracy:1%1%
Bias: X, Y, Z< ±5mg< ±5mg
Non-Linearity:< 1%< 1%Full scale range
Bandwidth:20 Hz20 Hz

Environmental

Temperature: Operating-30°C to +60°C-30°C to +60°C
Temperature: Storage-55°C to +85°C-55°C to +85°C
Vibration: Operating5g rms5g rms20 Hz to 2 kHz
Vibration: Survival10g rms10g rms20 Hz to 2 kHz
Shock: Survival500g500g10mS ½ sine wave

Electrical

Frame Rate:71.1Hz71.1HzMaximum
Startup Time: Data5 sec5 sec
Startup Time: Fully operational10 sec10 sec
Input Power:10 to 30VDC10 to 30VDC
Input Current:210mA @ 12VDC (2.5W)270mA @ 12VDC (3.2W)
Digital Output:RS-232RS-232
Analog Output:±10VDC±10VDC

Physical

Axis Alignment:< 0.25°< 0.25°
Size: Including Mounting Flanges3.24”W x 5.78”L x 2.75”H3.24”W x 5.78”L x 4.08”H
Weight:21oz (1.3lb)26oz (1.6lb)
Connection: RS-232 / Analog Outputs9 pin female "D" subminiature9 pin female "D" subminiature
Connection: Power9 pin male "D" subminiature9 pin male "D" subminiature
* Actual accuracy can be calculated as the listed percentage multiplied by the change in value over the entire dynamic maneuver.
Specifications are subject to change without notice.

VRS Vertical Gyro Dimensions

Vertical Reference Gyro VRS-E132-1AD

Single Axis VRS-E132-1AD

Vertical Reference Gyro VRS-E232-1AD

Dual Axis VRS-E232-1AD


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