A typical control loop consists of a plant, a few sensors taking measurements of observable variables of the plant, a controller which uses the gathered measurements to compute future inputs to the plant, and, one or more actuators which apply the inputs prescribed by the controller...
This project studies the solution to optimal control problems, characterized by control input affine systems, affected by stochastic disturbances and in some cases also subject to state and/or control input constraints are carried out...
Environmental and biological systems
In this research we aim at using the controllability of LEDs to adjust the light optimally to the needs of the grower and the needs of the plants. New greenhouse remote sensing techniques, based on analysis of the light from the plants, are therefore being developed for the determination of suitable continuous online feedback signals to the lamp controller...
In order to fully exploit the advantages of Recirculating Aquaculture Systems, the water exchange should be as small as possible. This implies strong demands on the water treatment, e.g. the maintenance of an efficient nitrification, denitrification and organic removal...
Automotive control applications
The main research topic in the project concerns how a priori information regarding the future trip can be acquired and utilized to improve PHEV energy efficiency. The research covers aspects such as quasi static powertrain modeling, convex optimization and optimal control techniques such as Dynamic Programming...
In this project convex optimization approach is used to find the optimal sizing of combustion engine, electrical motor and batter simultaneously with the optimal energy management strategy. This requires appropriate models that describe how the electric motor and internal combustion engine sizes affect the power flows and cost of these components...
The Multi-Level Converter (MLC) is a power electronic converter which is modular in structure and hence provides ‘extra knobs’ to control and monitor the behavior of battery on cell level. The project aims at operation and control of MLC to optimize the performance of battery system to enhance the lifetime of battery pack...
A vital part of a system for closed-loop combustion control is sensors providing combustion information that can be fed back to the controller. This project investigates the use of a crankshaft integrated torque sensor for this purpose...
> Torque sensing in heavy-duty powertrainsIn this project the potential use of placing the ABB torque sensor (Torductor) between the flywheel and the gearbox is explored. In particular the research is focused on two applications; zero torque prediction and combustion diagnosis...
> Intelligent transport systemsAdvanced control techniques implemented on available actuators such as traffic lights or variable speed limits give the chance to reduce the possibility of traffic congestions or incidents. In addition, with the help of surveillance system, accidents can be detected in time and suitable control measures can be taken to overcome or decrease...
Electric power applications
The overall objective of this project is to investigate control methods for voltage source converter based HVDC transmission systems. The intension is to analyse the dynamics of HVDC systems from a control and supervision perspective and propose robust controllers...
> Wind power turbine controlThe goal of the previous project project ’Stochastic Model Predictive Control of Wind Turbines’ was to develop a concept ready novel control architecture for a wind turbine control with extended load mitigation capabilities and power output improvement. The goal of this project has been reached with the following results...