Title :
On sensitivity improvement by a stable controller in SISO digital control systems
Author_Institution :
Nanyang Technol. Univ., Singapore
Abstract :
In Hera and Sung (1989), it is shown that for a SISO digital control system, sensitivity improvement is possible by a two-delay output controller. In this paper, it is shown that the result is restricted to a limited class of SISO plants only. To help circumvent the problem, the author provides an approach towards sensitivity improvement using a generalized sampled-data hold function (GSHF) based two-delay output controller. The proposed controller is able to attain the infimum of the H/sup /spl infin//-norm sensitivity optimization problem for a two-delay digital control system irrespective of whether the continuous-time plant has zeros at the origin or not.<>
Keywords :
H/sup /spl infin// optimisation; continuous time systems; delay systems; digital control; sensitivity; stability; H/sup /spl infin//-norm sensitivity optimization; SISO digital control systems; continuous-time plant; generalized sampled-data hold function; sensitivity improvement; stable controller; two-delay output controller; Additives; Attenuation measurement; Control systems; Delay effects; Digital control; Erbium; Feedback; Particle measurements; Robust control; Robustness;
Conference_Titel :
TENCON '93. Proceedings. Computer, Communication, Control and Power Engineering.1993 IEEE Region 10 Conference on
Conference_Location :
Beijing, China
Print_ISBN :
0-7803-1233-3
DOI :
10.1109/TENCON.1993.320512
