Rotary Servo Base Unit

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Easy-to-use, Expandable Platform for Controls Teaching and Research

The Rotary Servo Base Unit (SRV02) is the fundamental unit for Quanser rotary control experiments. It is ideally suited to introduce basic control concepts and theories relevant to real world applications of servomotors, from cruise control in automobiles to high-precision robotics manipulators used in industry. Students learn how to:

  • find a transfer function that describes the rotary motion of the rotary servo load shaft
  • develop feedback system to control the position of the rotary servo load shaft
  • design a PI controller and a lead compensator to regulate the rotary servo load shaft speed

In addition to teaching control concepts, the Rotary Servo Base Unit can be used for research in various areas, including nonlinear control, optimal control, time delay, and dynamic inversion.

Wider Range of Experiments with a Minimal Investment

The easy-to-use and intuitive rotary servo platform can be expanded by adding other modules, such as Inverted Pendulum and Double Inverted Pendulum, Flexible Link and Flexible Joint, Ball and Beam, Gyro/Stable Platform. With other modules using two Rotary Servo Base Units, such as 2 DOF Robot, 2 DOF Pendulum, Multi-DOF Torsion and 2 DOF Ball Balancer you can create Multi-DOF experiments with increased complexity. This allows you to teach an even wider range of control concepts with a minimal investment.

Click here for a video overview of the SRV02-based control solutions.

How It works

The Rotary Servo Base Unit is a geared servo-mechanism system. It consists of a DC motor in a solid aluminum frame. This DC motor drives the smaller pinion gear through an internal gear box. The pinion gear is fixed to a larger middle gear that rotates on the load shaft. The position of the load shaft can be measured using a high resolution encoder.

The Rotary Servo Base Unit is equipped with an optical encoder and a potentiometer to measure the output shaft position, and a tachometer to measure the speed of the motor.

Quanser-developed ABET-aligned Courseware Included

The Rotary Servo Base Unit comes with Quanser-developed courseware standardized for ABET evaluation criteria. The workbook with exercises, together with the quick start resources, a comprehensive User Manual, pre-designed controllers and a system model allow you to get your lab running faster, saving months of time typically required to develop lab materials.

  • High quality DC servo motor and gearbox
  • High resolution optical encoders to sense position
  • Continuous turn potentiometer to sense position
  • Tachometer to sense motor speed
  • Robust machined aluminum casing with stainless steel gears
  • Variable loads and gear ratios
  • Optional slip ring for continuous measurement from instrumented modules
  • Ten easily interchangeable add-on modules
  • Easy-connect cables and connectors
  • Fully compatible with MATLAB®/Simulink® and LabVIEW™
  • Fully documented system models and parameters provided for MATLAB®, Simulink®, LabVIEW™ and Maple™
  • Open architecture design, allowing users to design their own controller
Plant dimensions (L x W x H) 15 cm x 15 cm x 18 cm
Plant mass 1.2 kg
Motor nominal input voltage 6 V
Motor maximum continuous current (recommended) 1 A
Motor maximum speed (recommended) 6,000 RPM
Potentiometer bias power ±12 V
Potentiometer measurement range ±5 V
Tachometer bias power ±12 V
Tachometer measurement range ±5 V
Tachometer sensitivity 0.0015 V/RPM
Encoder resolution (in quadrature) 4096 counts/rev

Topics Included in the Quanser-developed courseware:

Modeling Topics

  • First-principles derivation
  • Experimental derivation
  • Transfer function representation
  • Frequency response representation
  • Model validation

Control Topics

  • PID
  • Lead Compensator
The Rotary Servo Base Unit can be also used to teach other topics that are not included in the Quanser-developed courseware.

To set up your Rotary Servo Base Unit workstation, you need additional components. Quanser engineers recommend:

for MATLAB®/Simulink® users for LabVIEW™ users
1x Q2-USB data acquisition device¹ 1x VoltPAQ-X1 linear voltage amplifier
1x VoltPAQ-X1 linear voltage amplifier Quanser Rapid Control Prototyping toolkit software
QUARC real-time control software and one of the following options:
  - 1x NI myRIO with 1x Quanser Terminal Board for myRIO
  - 1x NI CompactRIO controller² with 1x Quanser Q1-CRIO module
  - 1x NI M- or X-series data acquisition device³ with 1x Quanser NI Terminal Board

¹ alternatively, you can use Q8-USB, QPIDe or any equivalent NI DAQ device supported by QUARC
² NI cRIO-9074, or NI cRIO-9024 with cRIO-9113 or cRIO-9114 chassis
³ NI DAQ device must be supported by Quanser RCP toolkit. Alternatively, you can use Quanser Q2-USBQ8-USB, or QPIDe

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Linear Servo Base Unit with Inverted Pendulum
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