EMBEDDED BASED VIRTUAL FEEDBACK CONTROL FOR A CONTINUOUS STIRRED TANK REACTOR (CSTR) CONTROL USING COMPACT RIO

[geethamr]

Contact Information

University:Anna University, Chennai

Team Members (with year of graduation): Geetha M(UG:2004; PG:2009; Ph.D., Doing)

Faculty Advisers: Dr.Jovitha Jerome

Email Address:geethamr@gmail.com

Submission Language English

Project Information

Title:EMBEDDED BASED VIRTUAL FEEDBACK CONTROL FOR A CONTINUOUS STIRRED TANK REACTOR (CSTR) CONTROL USING COMPACT RIO

Description:

The embedded based implementation of virtual feedback control of Continuous Stirred Tank Reactor (CSTR) using Compact RIO through LabVIEW Platform is attempted in this work

Products

NI hardware with model numbers:

LabVIEW Compact RIO (Controller NI 9072, AI Module

9219- 4 Channel capacities and AO Module 9263 – 4 channel capacities)

software: LabVIEW FPGA and RTC

toolkits used in project: System Identification tool kit

Control Design Toolkit

list of other hardware  required for the project:

A standalone Desktop PC  for Monitoring purpose. CSTR Bench mark system.

The Challenge

PROBLEM ADDRESSED: LIMITATIONS OF CLASSIC CONTROL SCHEME IN CSTR:

• Continuous measurement of concentration is not possible.

• So temperature is measured to infer about the concentration.

• Cascade control scheme uses more number of transmitters and controllers.

• Measurement inaccuracies are involved in conventional transmitter.

the description of my project:

The variables which characterize the quality of the final product in CSTR are often difficult to measure in real-time and cannot be directly measured using the feedback configuration. So, a virtual feedback control is implemented in real time to control the concentration directly using soft sensing technique. In feedback path, a hardware sensor is replaced with soft sensing technique namely an EKF.PID controllers are widely employed in industries to achieve a stable and desired closed loop response. This is because designing the PID controllers does not require exact model of the system. Also it is easier to deploy hardware for

PID controllers compared to the other controllers. But the PID controllers employed in industries fail to perform servo tracking and disturbance rejection simultaneously. This results in the deviation of the output from the desired set point. In order to overcome these defects of a conventional PID controller, an Enhanced PID (EPID) controller design was attempted in this work, which would instantaneously track the set point variations and neglect the disturbances simultaneously.

The Solution

<Explain how your project works.>

Experimental result confirms that the proposed method is far better than the traditional controller in the prospect of both the transient response and steady state response. The overshoot and settling time is effectively reduced with no steady-state error.

<Explain the benefits using LabVIEW and NI tools.>

This proposed work tries to project the efficiency of the real time controller developed using compact RIO, the ease with which many such embedded controllers can be developed in a very short duration of time at a reduced cost for development and maintenance, ruggedness and flexibility. The independent embedded controller has the ability to function without the help of a computer, showing its tremendous capability of running processes in a plant even when the centralized computer is undergoing repair or maintenance
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Figure 1. Block Diagram of Virtual Feedback Control

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<Attach VI code (optional).>

<Level of completion (beta, alpha, or fully functional)>

Fully Functional

<Time to build>

six months

<Additional revisions that could be made>

Auto tuning of EPID will be incorporated

Attach Poster (30 in. x 38 in.) and LabVIEW Code

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Nominate Your Professor (optional)

<Insert nomination. Does your professor use LabVIEW or other National Instruments technology to make learning difficult concepts engaging, interesting, and fun? If so, nominate him/her as an outstanding educator by telling us who they are, what they teach, and how they make learning a better experience for you.>

Dr.Jovitha Jerome

Professor and Head

Department of Instrumentation and Control Engg, PSG College of Technology, India