In this paper, an state-space approach to deadbeat servomechanism design is proposed using multirate input control. This paper focuses advantage of multirate control over conventional single-rate control. To achieve settling time specified, multirate controllers require less frequent sampling of measurement than single-rate ones. Multirate input mechanism can yield shorter settling time than si...

Multirate output controllers (MROCs) sample the plant outputs at a faster rate than they change the plant inputs. Consequently, they offer greater flexibility for controller design than conventional single-rate controllers. MROCs designed under mixed 2 / H H∞ performance have offered a new dimension in the design process. In this paper, we introduce the concept of lifting technique, fast discre...

This paper shows that multirate processing in a cascaded discrete-time modulator allows to reduce the power consumption by up to 35%. Multirate processing is possible in a discrete-time modulator by its adaptibility with the sampling frequency. The power reduction can be achieved by relaxing the sampling speed of the first stage and increasing it appropriately in the second stage. Furthermore, ...

This paper discusses the designs of Generalized Predictive Control (GPC) scheme. GPC is designed in two cases; the first is a multirate system, where the sampling interval of a plant output is an integer multiple of the holding interval of a control input, and the second is a fast-rate single-rate system, where both the holding and sampling intervals are equivalent to the holding interval of th...

Absmd-Often in controi system design. i t is only necessary to estimate a single (but prespecified) linear function of the system's state for the purpose of implementing a feedback control law. This can be achieved by a linear functional observer which may have order one less than the observability index of the plant. but generically cannot have smaller order. In this paper, we explore the conc...

equivalent or lift of the multirate plant, translating the given [231 G. M. Kranc, “Input-outPut analysis of multirate feedback SYSmultirate costs and noise covariances to the lifted space, and then solving a constrained .&ift-invariant LQG problem. Our main result also gives a procedure for rms noise power cost translation in a multirate QDES package. terns,” IRE Trans. Automat. Contr., vol. A...

Iterative learning control (ILC) is a simple and efficient solution to improve tracking accuracy for systems that execute repetitively the same tracing operation. For engineering applications of ILC, the main concern is the monotonic decay of tracking errors, in the sense of infinity norm or peak error, along the trials. Low cost in implementation and robustness in performance are also critical...