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LINKÖPING This report and other reports from the automatic control group in Linkk oping are available by anonymous Abstract. We analyze Glad/Fliess algebraic observability for polynomial control systems from a commutative algebraic/algebro-geometric point of view. Furthermore we show some relations between algebraic observabil-ity and realization theory for(More)
LINKÖPING This report and other reports from the automatic control group in Linkk oping are available by anonymous Abstract. I reproduce an elementary proof for the jacobian criterion for algebraic dependence and give an introduction to the basics of KK ahler diierentials. All results presented are known, but some of them are not easily accessible, either(More)
Lice and mites are highly contagious obligate parasites of humans and are spread by close, direct contact. Head, body, and pubic lice produce severely pruritic eruptions in their respective locations. Diagnosis is readily made by finding lice or nits on hair shafts, except in the case of body lice, which are found on the seams of clothing. Scabies often(More)
Methods from computer algebra, mostly so called Grr obner bases from commutative algebra, are used to solve the algebraic Riccati equation (ARE) symbolically. The methods suggested allow us to track the innuence of parameters in the system or penalty matrices on the solution. Some non-trivial aspects arise when addressing the problem from the point of view(More)
In the presence of frequent inlet flow upsets, tuning of averaging level controllers is typically quite complicated since not only the size of the individual steps but also the time in between the subsequent steps need to considered. One structured way to achieve optimal filtering for such a case is to use Robust Model Predictive Control. The robust MPC(More)
A method for detecting static friction (stiction) in control valves is proposed. The method is model-based and is inspired by ideas from the fields of change detection and multi-model mode estimation. Opposed to existing methods only limited process knowledge is needed and it is not required that the loop has oscillating behavior. The advantage of the(More)
Frequent inlet flow changes, especially in the same direction, typically cause problems for averaging level controllers. To obtain optimal flow filtering while being robust towards future inlet flow upsets closed loop robust MPC has been used. It differs from other averaging controllers in that it does not return the tank level to a fixed set-point, but(More)