QUBE-Servo 2

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Low Cost Teaching Platform for Mechatronics and Control Labs

The Quanser QUBE™-Servo 2 is a fully integrated, modular servomotor lab experiment designed for teaching mechatronics and control concepts at the undergraduate level.

Integrating Quanser-developed QFLEX 2 computing interface technology, QUBE-Servo 2 provides more flexibility in lab configurations, using a PC, or microcontrollers, such as NI myRIO, Arduino and Raspberry Pi. With the comprehensive course materials included, you can build a state-of-the-art undergraduate teaching lab for your mechatronics or control courses, and engage students in various design and capstone projects.

How It Works

The QUBE-Servo 2 experiment consists of a DC motor with an optical encoder, providing position and velocity feedback, a built-in amplifier with integrated current sensor, a data acquisition device, and a QFLEX 2 computing interface.

The experiment comes with two add-on modules - an inertia disk and a pendulum. With a tool-less, quick-connect interface, you can easily attach the module, or remove it while the controller is running to observe the effect of different inertias on a controller response. Moreover, you can design and 3D print your own add-on modules to expand the scope of the experiment, or to create an engaging student project¹.

The QUBE-Servo 2 also has a user-controllable tri-color LED strip. Users can program the LED to indicate state, power, or other control performance parameters of QUBE-Servo 2.

QUBE-Servo 2 Interface Options

The QUBE-Servo 2 is available with two different, easily interchangeable interface panels:

QFLEX 2 USB interface panel QUBE-Servo 2 USB experiment, with QFLEX 2 USB interface panel, interfaces to Quanser’s control software running on your lab’s PC via a standard USB 2.0 connection.
The QUBE-Servo 2 USB can be used with MATLAB®/Simulink® and Quanser QUARC software, or with LabVIEW™ using the Quanser RCP software. With the USB version of the experiment, you can take full advantage of the comprehensive course materials and lab experiments for your controls-based courses and projects.
QFLEX 2 Embedded interface panel QUBE-Servo 2 Embedded experiment, with QFLEX 2 Embedded interface panel, interfaces to your microcontroller (not included with the experiment) via SPI connection.
The QUBE-Servo 2 Embedded does not require any additional software. This option is ideal to expose students to various microcontroller techniques, as well as for final (capstone) projects in mechatronics, control, or other similar programs.
Similar experiment - QUBE-Servo for NI myRIO allows for interfacing to NI myRIO embedded controller via MXP connection. The QUBE-Servo for NI myRIO is available exclusively from National Instruments.

Flexible Digital Media Courseware Included

The QUBE-Servo 2 USB experiment comes with a mix-and-match, open source, rich digital media courseware, standardized for requirements of ABET evaluation criteria. The courseware topics are independent of each other, so you can build your own experiments sequence, and adapt the materials to existing course. The courseware also includes content for application labs, putting control concepts into the real-world application context.

The QUBE-Servo Embedded experiment  comes with examples of interfacing techniques and controllers (as Arduino sketches), as well as an interfacing datasheet detailing the connections and protocols used. The courseware resources developed for QUBE-Servo 2 USB experiment are included for reference.

Map the Courseware to Your Control Textbook

To make the courseware easily adaptable to your course, we developed a comprehensive mapping of courseware topics to the most popular control engineering textbooks, including:

  • Control Systems Engineering by Norman S. Nise
  • Feedback Systems by K.J. Åstrom, R.M. Murray
  • Feedback Control of Dynamic Systems by G.F. Franklin, J.D. Powell, A. Emai-Naeini
  • Modern Control Systems by R.C. Dorf, R.H. Bishop
  • Modern Control Engineering by K. Ogata
  • Automatic Control Systems by F. Golnaraghi, B.C. Kuo
  • Control Systems Engineering by I.J. Nagrath, M. Gopal
  • Mechatronics by W. Bolton

Download the textbook mapping guide.

¹ The performance and safety of the experiment is guaranteed only with the original parts supplied by Quanser.

  • Compact and integrated rotary servo system
  • Tool-less quick connect module inter face
  • Direct-drive brushed DC motor
  • High resolution optical encoder
  • Built-in voltage amplifier with integrated current and tachometer sensors
  • Integrated data acquisition (DAQ) device
  • Flexible QFLEX 2 computing interface for USB and SPI/QBus connections
  • User-controllable tri-color LED
  • Easy-connect cables and connectors
  • Open architecture design, allowing users to design their own controller
  • Fully compatible with MATLAB®/Simulink® and LabVIEW
  • Fully documented system models and parameters provided for MATLAB®/Simulink®, LabVIEW™
  • Microcontroller examples and interfacing datasheet provided for the QUBE-Servo 2 Embedded
  • Additional community-created resources available on www.QuanserShare.com
Dimensions (W x L x H) 10.2 cm x 10.2 cm x 11.7 cm
Mass 1.2 kg
Inertia disk mass  0.054 kg
Pendulum mass 0.100 kg
Pendulum length (pivot to tip)  9.5 cm
Motor and pendulum encoder resolution (non-quadrature decoding) 512 counts/revolution
DC motor nominal input voltage 18 V
DC motor nominal current 0.54 A
DC motor nominal speed (no load) 4050 RPM
- QFLEX 2 Embedded

Standard USB 2.0 connector

Topics included in the Quanser-developed QUBE-Servo 2 USB courseware:

Inertia Disk Module:

  • Hardware integration
  • Step response modeling
  • Noise measurement and filtering
  • Electromechanical modeling
  • Second-order systems
  • PD control
  • Stability analysis
  • Lead Compensator

Pendulum Module:

  • Pendulum modeling
  • Moment of inertia
  • Balance control
  • State-feedback LQR-based control
  • State-space modeling
  • Swing-up control

These courseware materials are also supplied with the QUBE-Servo 2 Embedded experiment for reference purposes.

The QUBE™-Servo 2 can be also used to teach other topics that are not included in the Quanser-developed courseware.

The QUBE-Servo 2 experiment comes with a QFLEX 2 interface panel of your choice (USB or Embedded). Additional panel can be purchased separately.

To set up your QUBE-Servo 2 USB experiment, you need also Quanser control software:
    - QUARC for MATLAB/Simulink¹ users
    - QRCP for LabVIEW¹ users

The QUBE-Servo 2 Embedded experiment does not require any additional components from Quanser².

Similar experiment - QUBE-Servo for NI myRIO - allows for control using NI myRIO embedded controller via MXP interface. The QUBE-Servo for NI myRIO is available exclusively from National Instruments. For details, visit www.ni.com.

¹ MATLAB, Simulink or LabVIEW licenses are not included.
² The microcontroller is not included.

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