翻訳と辞書
Words near each other
・ Iterated monodromy group
・ Iteratee
・ ITerating
・ Iteration
・ Iteration (disambiguation)
・ Iteration mark
・ Iterations of I
・ Iterative and incremental development
・ Iterative aspect
・ Iterative closest point
・ Iterative compression
・ Iterative deepening A*
・ Iterative deepening depth-first search
・ Iterative design
・ Iterative impedance
Iterative learning control
・ Iterative method
・ Iterative proportional fitting
・ Iterative Receiver Design
・ Iterative reconstruction
・ Iterative refinement
・ Iterative Template Library
・ Iterative Viterbi decoding
・ Iteratively reweighted least squares
・ Iterator
・ Iterator pattern
・ Iteri language
・ Iteris
・ ITerm2
・ Itero de la Vega


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Iterative learning control : ウィキペディア英語版
Iterative learning control

Iterative Learning Control (ILC) is a method of tracking control for systems that work in a repetitive mode. Examples of systems that operate in a repetitive manner include robot arm manipulators, chemical batch processes and reliability testing rigs. In each of these tasks the system is required to perform the same action over and over again with high precision. This action is represented by the objective of accurately tracking a chosen reference signal r(t) on a finite time interval.
Repetition allows the system to improve tracking accuracy from repetition to repetition, in effect learning the required input needed to track the reference exactly. The learning process uses information from previous repetitions to improve the control signal ultimately enabling a suitable control action can be found iteratively. The internal model principle yields conditions under which perfect tracking can be achieved but the design of the control algorithm still leaves many decisions to be made to suit the application. A typical, simple control law is of the form:
:u_=u_p +K
* e_p
where u_p is the input to the system during the pth repetition, e_p is the tracking error during the pth repetition and K is a design parameter representing operations on e_p. Achieving perfect tracking through iteration is represented by the mathematical requirement of convergence of the input signals as p becomes large whilst the rate of this convergence represents the desirable practical need for the learning process to be rapid. There is also the need to ensure good algorithm performance even in the presence of uncertainty about the details of process dynamics. The operation K is crucial to achieving design objectives and ranges from simple scalar gains to sophisticated optimization computations.
==References==

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抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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