Title :
Advantage of low complexity in digital controllers with finite wordlength
Author :
Rabbath, C.A. ; Hori, N.
Author_Institution :
Dept. of Mech. Eng., McGill Univ., Montreal, Que., Canada
Abstract :
The paper shows the main advantage of certain low-complexity digital control strategies over techniques resulting in more complex control systems; that is, the superior level of performance when subjected to finite wordlength effects. Examples demonstrate the performance limitations associated with highly complex control laws and the benefits of using properly selected, simple control schemes when implemented with fixed- and floating-point arithmetic and restricted number of bits
Keywords :
closed loop systems; computational complexity; continuous time systems; digital control; feedback; fixed point arithmetic; floating point arithmetic; sampled data systems; transfer functions; digital controllers; finite wordlength; fixed-point arithmetic; floating-point arithmetic; highly complex control laws; low complexity; performance limitations; Computational modeling; Control systems; Costs; Digital control; Finite wordlength effects; Mechanical engineering; Paper technology; Robot control; Sampling methods; Stability;
Conference_Titel :
SICE 2001. Proceedings of the 40th SICE Annual Conference. International Session Papers
Conference_Location :
Nagoya
Print_ISBN :
0-7803-7306-5
DOI :
10.1109/SICE.2001.977823
