"The very act of building models and producing a simulation adds to the engineers understanding of how to design a control a system. It reveals where the major disturbances, interactions, nonlinearities and problems are likely to arise."
Prof. Mike Grimble - Read more in Secrets of Model Based Control
We can purpose-build properly validated dynamic models and simulation to meet our clients' specific objectives, including:
Models can be derived from first principles or plant data and we help clients understand the developed model to the depth they require and provide training if appropriate.
Systems of every type and their operating conditions are subject to variations, such as changes in products (new operating points etc.) and raw material sources, plant modifications, wear and tear of actuators (e.g. valves and drives), and degradation of measurement sensors.
It is impossible to test the control systems for every possible condition prior to deployment. Dynamic modelling and simulation thus play an important role in control systems development:
One vital aspect of using models and simulations is that their usefulness depends greatly on the quality of the models which should be neither too simple nor too complex but fit for purpose. The judgement on this however comes from the experience of those who build the models.
For 25 years, we have modelled and simulated a diversity of systems and processes to aid the troubleshooting of existing control systems and the development of effective control strategies and shortening of the design to deployment cycle. Our engineers have amassed rich experience in building well validated nonlinear dynamic models of mechanical, hydraulic, electrical, combustion, process, and chemical systems for applications from marine, power generation, automotive, to oil and gas and other process industries.
Our engineers utilise a wide variety of modelling packages such as MATLAB/Simulink, LabVIEW and CD&SIM Toolkit, as well as Hysys.
In the case where the end-user does not wish to purchase a simulation package, and instead just needs to use the model, we can even provide standalone simulations.
We can also undertake work to convert legacy models into new modelling packages, including model conversion from Simulink to LabVIEW.
ISC developed a first principles model of this novel process for use on an offshore oil platform. This was to de-risk and refine the process design as it went through the design and factory testing phases to give our client much greater confidence of the system working properly as it moved to final commissioning and use. The model was able to replicate system operation in all expected produced water flow rates and quality, and we were able to refine recommended operational procedures, control strategy and loop tuning.
A chemical company wanted to greatly reduce the size of a mixing vessel to minimise waste when changing recipes. A dynamic model was built to assess the viability of level control and the impact on composition and wider process operations.
A detailed dynamic model of a CHP plant was used to investigate how steam pressure could be improved though modified control strategies. The study showed improved stability and a potential increase in steam turbine power output.
To investigate the possibility of trips in the steam condensate plant a high fidelity dynamic model was developed and used to identify where additional sensing would be beneficial.