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Hexapod with real-time controller under LabVIEWTM

 
 

Micromega Dynamics now offers its "Active Steering & Structural Damping Interface" with an open controller programmable under the National Instruments LabVIEW Real-TimeTM environment. The "Active Steering & Structural Damping Interface" consists of a stiff active six degree-of-freedom hexapod (Steward platform with cubic architecture). Each leg consists of a linear piezoelectric actuator, a collocated force sensor and flexible tips for the connection to the base plates. The hexapod can be used as damping interface connecting arbitrary structures, microvibration isolator, or high precision pointing mechanism.

Description

Architecture

Main Features

  • 6 degrees-of-freedom
  • Uniform high stiffness in all directions
  • Low voltage piezoelectric actuators
  • High resolution force sensors
  • PC-based real-time open controller programmable with LabVIEWTM

Applications

  • Active damping
  • Acitve Isolation
  • Nanopositioning and precision steering
  • Programmable stiffness
  • Fast prototyping, experimentation of different control strategies
  • Integration into larger systems
 


 

 Specifications

 
 

 Hexapod

  Size :
  • D = 250 mm
  • H = 100 mm

  Weight : 3 kg

  Stroke :

  • Tx= 60 µm
    Rx= 0.4 mrad
  • Ty= 60 µm
    Ry= 0.4 mrad
  • Tz= 90 µm
    Rz= 0.3 mrad

  Resolution : 5 nmrms

  Rotation :
  • 70 nradrms

Maximum Load:

  • 100N / 4Nm

Force resolution :

  • 0.1 mNrms

Bandwidth : 200 Hz

Stiffness :

  • Translation: 1.5 Nm/µm
  • Rotation: 10 Nm/mrad
 

 Controller

  • 6 (+2 spare) analog inputs
  • 6 (+2 spare) analog outputs
  • Usual control laws run at 2kHz on 6 channels simultaneously
 

Advantages

  • Graphical Programming with LabVIEWTM and LabVIEW RTTM through intuitive Windows interfaces that let you concentrate on your actual control design task.

  • Numerous controls, monitoring, displays, signal analysis, and communication tools provided through LabVIEWTM libraries let you implement your application easily and evaluate system behavior.

  • LabVIEW RTTM automatically generates code that runs under the Windows Real Time Extension (RTXTM by Venturcom) from block diagrams; this mechanism is fully transparent to the user.

  • System is supplied "ready-to-go" with a desktop PC pre-loaded with Windows XP, its Real-Time Extension, the LabVIEW development environment, as well as programming examples

Delivery

  • Desktop PC equipped with I/O board and fully loaded with LabVIEW real-time development environment, as well as programming examples
  • Drive and monitoring unit including 6 low-noise charge amplifiers and 6 piezo drivers
  • Hexapod
  • Interconnecting cables

Options

  • Other hexapod strokes and loads
  • Industrial Computer (in place of the desktop PC)
  • Additional I/O or external links
  • Custom application programming
  • Current drivers for charge control of piezoelectric actuators

 

 
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