Introduction to Aspen DMCplus for APC Engineers

Learn how to develop and build control models and applications, and perform off-line tuning and simulation.  Learn how to use the SmartStep mode of Aspen DMCplus. Develop skills to carry out Aspen DMCplus control projects and troubleshooting and maintaining Aspen DMCplus controllers. 

This course is a combination of APC120: Introduction to aspenONE Advanced Process Control - Operating and Maintaining Controllers Online, and APC121: Introduction to Aspen DMCplus - Modeling and Building Controllers for Industrial Processes.

Audience:

  •  Engineers who are maintaining existing Aspen DMCplus controllers
  •  Description of the theoretical concepts that form the basis of the Aspen DMCplus family of products
  •  Engineers who are designing or implementing new Aspen DMCplus controllers
  •  Operating supervisors and console operators who are involved in Aspen DMCplus control projects

Training Details

  • Course Id:

    APC101

  • Duration:

    5 day(s)

  • CEUs Awarded:

    3.5

  • Level:

    Introductory

Benefits

  •  Acquire the skills and knowledge required to participate on or lead a team charged with the development and deployment of an Advanced Process Control application
  •  Acquire the skills and knowledge required to use and maintain Aspen DMCplus and Aspen DMC3 controllers
  •  Know how to use DMCplus Model to identify a controller model before implementing the controller online
  •  Increased effectiveness in basic troubleshooting of Aspen DMCplus and Aspen DMC3 controllers
  •  Increased awareness of the operating characteristics and capabilities of Aspen DMCplus and Aspen DMC3 controllers

Approach

  •  Introduction to basic concepts behind multivariable control
  •  Demonstrations of the ways in which the online tools are used
  •  Hands on workshops that allow operating and troubleshooting a typical Aspen DMCplus and Aspen DMC3 controller

Pre-requisites

Background in chemical process engineering and/or process operations Some familiarity with Microsoft® Windows operating systems

Subsequent Courses

This course serves as a prerequisite for many of the more advanced courses.
  •   APC170 Introduction to Aspen Inferential Qualities - Developing and Deploying Inferential Soft Sensors for Industrial Processes
  •   APC210 Aspen Watch Performance Monitor: Real Time Monitoring and Maintaining Controllers Online
  •   APC230 Aspen DMCplus: APC Project Pretesting Using a Virtual Plant
  •   APC240 Aspen DMCplus: APC Project Step Testing and Commissioning Using a Virtual Plant
  •   APC250 Aspen DMC3: APC Calibrate and Aspen Adaptive Modeling

Agenda

Basic Concepts
  •  Differentiate between Real Time Optimization and Advanced Control
  •  Understand the use cases for APC
  •  Learn about various AspenTech APC solutions
  •  Workshop: Democol Manual Operation

Control Terminology
  •  Review the definition of independent and dependent variables
  •  Review the definitions of a Unit Response Curve, Time to Steady State and Steady State Gain
  •  Review the defining characteristics of  Aspen DMCplus and Aspen DMC3 Models and Controllers
  •  Define a subcontroller

Production Control Web Server (PCWS)
  •  Learn how to use PCWS to interact with the controller
  •  Workshop: Democol Operation with Aspen DMCplus and Aspen DMC3 controller

APC Infrastructure
  •  Learn about the APC Infrastructure

Models of Aspen DMCplus and Aspen DMC3 controllers
  •  Introduction to the concept of plant test and different plant step test method
  •  Learn about Aspen DMCplus and Aspen DMC3 modeling procedures
  •  Workshop: Model Review

Aspen DMCplus Engine
  •  Learn about the three modules in an Aspen DMCplus and Aspen DMC3 Engine
  •  Learn which tuning parameters are used in each of the modules
  •  Workshop: Democol tuning

Aspen DMCplus Controller Online Troubleshooting
  •  Learn how to troubleshoot typical problems with an Aspen DMCplus or Aspen DMC3 online controller

DMC3 New Features
  •  Introduction to new features in Aspen DMC3
  •  Workshop: Democol Troubleshooting

Modeling Terminology
  •  Differentiate between Real Time Optimization and Advanced Control
  •  Discuss the characteristics of an independent variable and a dependent variable
  •  Review the definitions of a Unit Response Curve, Time to Steady State, and Steady State Gain
  •  Review the defining characteristics of an Aspen DMCplus Controller and the components comprising an Aspen APC Suite
  •  Introduction to Aspen DMC3

APC Project Overview
  •  Review the process for implementing an APC project
  •  Discuss available alternatives and proper documentation procedures

Dynamic Modeling of Linear Systems
  •  Review the definition of a dynamic, empirical, linear model and the technology of Finite Impulse Response (FIR) Modeling
  •  Discuss the strengths and drawbacks of an FIR model

Model Identification using DMCplus Model
  •  Familiarization with the DMCplus Model interface
  •  Use the vector import tool to bring data into DMCplus Model
  •  Review vector quality and perform data processing
  •  Define and run model identification cases
  •  Workshop: Fractionator Controller - Build a finite impulse response model for a simple fractionator

Model Analysis in DMCplus Model
  •  Define and Run Predictions
  •  Understand and use model analysis tools
  •  Workshop: Fractionator Controller - Evaluate and assemble the model
  •  Workshop: Fractionator Controller - Fix collinearity issues in the model

Variable Transformations
  •  Configure built in transforms to deal with non-linear data
  •  Configure transforms to rescale data
  •  Workshop: Fractionator Controller - Apply variable transformation

SubSpace Identification Technology
  •  Review modeling technology for MPC control
  •  Subspace Identification: fundamentals and features
  •  Aspen DMCplus - guidelines for Subspace modeling
  •  Workshop: Fractionator Controller - Build a subspace model for the fractionator 

Open Loop Prediction
  •  Learn how DMCplus uses the dynamic model to predict the future behavior of controlled variables
  •  Learn how DMCplus accounts for differences between the prediction and the actual measurements
  •  Learn how DMCplus corrects predictions for ramp variables
  •  Learn how prediction errors can be used to assess modeling errors
  •  Workshop: Fractionator Controller - Configure prediction error filter options

Steady-State Feasibility Check
  •  Introduce the DMCplus Steady State Optimization features
  •  Recognize how DMCplus uses the Steady State Predictions in Projecting the Optimum Operating Point for the Process
  •  Differentiate between a Linear Program and a Quadratic Program

Economic Optimization
  •  Determine how MV Costs can be used to drive the Process to an Economic Optimum
  •  Determine how an external Optimizer can affect the DMCplus Steady State Solution
  •  Workshop: Fractionator Controller - Calculating Steady State Cost and configuring the Steady State Optimizer

Minimizing Dynamic Errors
  •  Introduce DMCplus Dynamic Move Calculations features
  •  Discuss how computing multiple future moves improves control
  •  Understand tradeoffs between move aggressiveness and error minimization
  •  Explain how ramps are controlled dynamically
  •  Review details of the Move Calculation

Using DMCplus Build and DMCplus Simulate
  •  Build Controller Configuration Files (CCF) using DMCplus Build
  •  Write custom calculations using DMCplus Build
  •  Review tuning and simulate controller operation using DMCplus Simulate
  •  Workshop: Fractionator Controller - Configure the CCF file using DMCplus Build
  •  Workshop: Fractionator Controller - Dynamic Tuning to adjust move suppressions to achieve smooth control

Calculations and Gain Scheduling
  •  Configure input and output calculations to modify controller data
  •  Configure gain scheduling to modify model gains on the fly
  •  Configure and manage model switching
  •  Workshop: Fractionator Controller - Configure custom built controller calculations

External Targets
  •  Identify and explain the application of External Targets:
  •  External Target Definitions
  •  RTO and IRV Style External Targets
  •  External Target Attributes

Subcontrollers
  •  Identify and explain subcontroller concepts
  •  Discuss MV and CV memberships in Subcontrollers
  •  Subcontrollers and shedding
  •  Introduction to Composites

Ramp Variable Techniques
  •  Learn how to deal with process ramp variables by using one of the following types:
  •  Balanced Ramps
  •  Ramps with allowed Imbalance
  •  Program Imbalance Ramps
  •  Pseudo-ramps
  •  Discuss the effects of the ramp horizon on ramp calculation
  •  Workshop: DemoCol Controller - Observe the effects of changing tuning parameters on ramp behavior

New Features in Aspen APC Suite
  •  Review the new features available with Aspen DMC3 controllers

Appendix: Controller Variable Validation
  •  Learn how to deal with the Controller's variable validation process:
  •  General Variables
  •  Manipulated and Feedforward Variables
  •  Subcontrollers and Composite
  •  External Targets
Certification Exam

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