15 research outputs found
Inverse problems in 2-norm and infinity-norm controller synthesis
This paper studies certain inverse problems in the optimal frequency-domain synthesis of robust controllers, in both the 2-norm and the infinity-norm. These inverse problems identify the class of controllers which are optimal for some choice of weights. Their implications for loopshaping are discussed. \u
Robust shape control in a sendzimir cold-rolling steel mill
The shape control problem for a Sendzimir 20-roll cold rolling steel mill is characterised by operation over a wide range of conditions arising from roll changes, changes in rolling schedules and changes in material gauge, width and hardness. Previous approaches to the problem suggest storing a large number of precompensator matrices to cater for the full range of operating conditions. This paper, on the other hand, attempts to synthesise a controller which is optimally robust to changes in the conditions associated with the rolling cluster, resulting in a reduced storage requirement for the controlling computer. The performance of the robust controller is evaluated via nonlinear simulation
Robust shape control in a Sendzimir cold-rolling steel mill
The shape control problem for a Sendzimir 20-roll cold rolling steel mill is characterised by operation
over a wide range
of
conditions arising from roll changes, changes in rolling schedules
and
changes in material
gauge, width and hardness. Previous approaches
to the problem suggest storing a large number of
precompensator matrices
to
cater for the full range
of
operating conditions. This paper, on the other hand,
attempts
to synthesise a controller which is optimally robust to changes in the conditions associated with the
rolling cluster, resulting in a reduced storage requirement for the controlling computer. The performance
of
the
robust controller is evaluated via nonlinear simulation