Aspen DMCplus Controller for Olefins
A powerful, proven multivariable controller for maintaining
processes at their optimal operating point
Aspen DMCplus Controller for Olefins is the
industry-leading multivariable model-predictive controller with
tailored pricing for large applications. It interfaces to processes
directly with the DCS or indirectly through process information
management systems, capable of safely pushing processes to multiple
constraints simultaneously. The Aspen DMCplus control system is
proven to solve large-scope problems without compromising the
control system service factor. Aspen DMCplus Controller for
Olefins is a core component of AspenTech’s
aspenONE® Advanced Process Control applications.
Features
- Tailored pricing for larger applications
- Browser-based operator and engineer real-time user interface
– web-based interface for viewing or changing controller
configuration and viewing easy-to-read, real-time displays
- Seamless integration – controllers integrate easily with
Aspen Automated Process Tester for efficient step testing
and Aspen Watch for performance monitoring and
troubleshooting
- Powerful subspace identification algorithm – identifies
better models with shorter test data sets; produces smoother models
without compromising accuracy, cleans up dead times, and avoids
unsubstantiated inverse responses.
- Model uncertainty and cross-correlation –analysis tool to
assess model accuracy, determine when sufficient step testing has
been achieved, and select the best model curves.
- Standard supported sub-controllers – easily organizes a
large controller into groups of related variables for display and
for turning variables on and off together
- Explicit CV ranking – provides for explicit
prioritization of controlled variables independent of dynamic
tuning
- Quadratic and Linear Programs for steady-state target
calculation – specify either LP or QP solution type for each
rank group
- Dynamic weighting – variables near their limits can be
weighted more strongly in the controller move calculations
- Prediction error filtering – exponential, moving average
or traditional bias updating schemes
- Standard configurable transforms with no coding – input
and output variable transformations can be specified with no
external calling or database maintenance
- Enhanced on-line simulation capability – a complete
on-line snapshot can be uploaded to the GUI-based simulation for
performance evaluation
- Variable gains – permits the changing of controller gains
on-line, enhancing the ability to deal with highly nonlinear
systems and systems with mode changes
Benefits
- Maintains tight quality specifications across the range of
products and operating conditions. Provides excellent disturbance
rejection resulting in lower process variability and a reduction in
off-spec material. Aspen DMCplus maintains tight control and
reduces process variance across the entire operating range.
- Maximizes throughput by operating closer to constraints,
enabling greater capacity from existing assets.
- Improves operating stability and constraint handling, resulting
in less unscheduled plant downtime. Improves plant safety by
compensating for process disturbances before they drive the process
to unstable regions.
- Efficiently scales to any control problem size and has been
successfully applied to virtually every linear control problem in
refining, chemicals, and petrochemicals processing.
- Lowers cost of ownership via reduced maintenance requirements
and simplified workflows for implementation and management.