Title :
A closed loop feedback method for a manual bar straightener
Author :
Miklosovic, Robert J. ; Gao, Zhiqiang
Author_Institution :
Dept. of Electr. & Comput. Eng., Cleveland State Univ., OH, USA
Abstract :
Automation of a unique manually controlled industrial bar straightener is proposed. A continuous-time closed loop model is constructed in Simulink for an event-driven process through the use of asynchronous timers. The system is simulated with linear and nonlinear PD controllers. A nonlinear filter, called the tracking differentiator, is introduced as an alternative to a linear approximate means of providing accurate derivative feedback in the presence of noise. In both cases, the nonlinear techniques outperformed their linear counterparts while retaining tuning simplicity.
Keywords :
closed loop systems; continuous time systems; feedback; industrial control; nonlinear control systems; spatial variables control; spatial variables measurement; three-term control; tuning; two-term control; ultrasonic measurement; PID controller; Simulink; asynchronous timers; closed loop feedback method; continuous-time closed loop model; cylindrical metal bar; derivative feedback; event-driven process; linear PD controllers; manual bar straightener; noise; noncontact ultrasonic sensor; nonlinear PD controllers; nonlinear filter; tracking differentiator; tuning simplicity; Computational modeling; Computer industry; Electrical equipment industry; Feedback loop; Industrial control; Length measurement; Nonlinear control systems; PD control; Rotation measurement; Shape measurement;
Conference_Titel :
Industry Applications Conference, 2003. 38th IAS Annual Meeting. Conference Record of the
Print_ISBN :
0-7803-7883-0
DOI :
10.1109/IAS.2003.1257526
