Title :
LQG optimal control of multirate sampled-data systems
Author :
Colaneri, P. ; Scattolini, R. ; Schiavoni, N.
Author_Institution :
Centro di Teoria dei Sistemi, Consiglio Nazionale delle Ricerche, Milano, Italy
fDate :
5/1/1992 12:00:00 AM
Abstract :
An LQG control synthesis technique for multirate sampled-data systems where each input has its own frequency of updating and each output has its own frequency of measurement is presented. The skew of the output-sampling mechanism renders the prediction problem singular for the lack of measures at some time instants. An ad hoc prediction algorithm is derived by enlarging the dimension of the state vector to be estimated and feeding the state filter with a combination of measured outputs over a past and finite interval of time. The constraints on the input-updating mechanism are dealt with by inserting a dynamical system corresponding to a zero-order hold into the loop
Keywords :
control system synthesis; optimal control; sampled data systems; state estimation; LQG optimal control; control system synthesis; input-updating mechanism; multirate sampled-data systems; output-sampling mechanism; singular prediction problem; state filter; Control system synthesis; Control systems; Filters; Frequency measurement; Frequency synthesizers; Optimal control; Prediction algorithms; Sampling methods; State estimation; Time measurement;
Journal_Title :
Automatic Control, IEEE Transactions on