Posted in | Accelerometers

Miniature Linear Servo Accelerometer with High Accuracy

The A200 range of Servo Accelerometers from Sherborne Sensors is designed to perform high-accuracy measurement of vector acceleration with a closed-loop, force-balance torque mechanism. A pendulous mass forms a torque proportional to the product of its mass unbalance and the applied acceleration. The movement of the mass is sensed by a position sensor, the output signal of which is linked to a servo amplifier. The resultant current is conveyed to the torque motor, which then forms a torque precisely equal to, but directly opposed to, the original torque from the pendulous mass.

Then, the mass stops moving, taking on a position minutely varying from its original zero “g” position. Concurrently, the current to the torque motor is conveyed via a stable resistor to deliver an output voltage relative to the applied acceleration. Electronic damping of the system is achieved through a phase advancing network within the integrated servo amplifier. Modification of the parameters of the servo amplifier and associated electronic networks enables optimization of the operating features of a servo accelerometer to match a specific application.

Features

  • High resolution down to 0.05 mg
  • Ranges from ±1 g to ± 20 g are available
  • Closed-loop force balance system
  • 1 g bias option available to compensate for earth’s gravity (A220 only)
  • Flight qualified versions are provided
  • DC Input–DC Output
  • Self-test facility
  • Made to ISO 9001:2000 and AS9100B standards

Applications

  • Low-frequency analysis
  • Structural health monitoring
  • Flight test monitoring
  • Data acquisition systems
  • Braking control on mass transit systems
  • Accident data collection
  • Flight simulators
  • Road-bed analysis

Miniature Linear Servo Accelerometer with High Accuracy

Miniature Linear Servo Accelerometer with High Accuracy - Picture 1
Miniature Linear Servo Accelerometer with High Accuracy - Picture 2
Miniature Linear Servo Accelerometer with High Accuracy - Picture 3

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