tracking error


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tracking error

[′trak·iŋ ‚er·ər]
(engineering acoustics)
Deviation of the vibration axis of a phonograph pickup from tangency with a groove; true tangency is possible for only one groove when the pickup arm is pivoted; the longer the pickup arm, the less is the tracking error.
References in periodicals archive ?
Additionally, using the second derivation of the tracking error function, (11) can be re-written as follows
Several methods are used for calculating tracking error. Tracking error typically represents the average absolute value of the tracking difference or the standard deviation of the tracking differences.
The control objective is to find a control sequence {[u.sub.j] (k)} with the ability to reduce tracking error for the whole trajectory based on the past tracking experiences until j [right arrow] [infinity], the system tracking error limit is
Therefore, the tracking error [omega](t) is bounded because e(t), [delta](t), and [xi](t) are bounded.
where T is the time constant of the inertial element in the unit of seconds and [K.sub.c_optimal] is the optimal loop gain which can minimize the dominating tracking error. The inertial element can delay the change rate of the actual loop gain, as shown in Figure 3.
According to (7) and (9), the consensus tracking error of the agent i at the kth iteration is defined as
The above-mentioned literatures all focus on the influence of the total tracking error of dish concentrator systems on the flux distribution and optical performance, while the researches of the influence of the tracking error of the EATD on the tracking performance and optical performance of dish concentrator system are limited.
Accordingly, tracking errors in (17) change to [S.sub.V] + [DELTA][S.sub.V] and [S.sub.h] + [DELTA][S.sub.h].
Analyst gatekeepers who use annual volatility, Sharpe ratio, tracking error and the like to determine long-horizon investments.
Define the tracking error between the actual states and the desired states as follows:
To choose the tracking error vectors [e.sub.R] and [e.sub.[OMEGA]] reasonably, let
More recently, the prescribed performance control (PPC) scheme which denotes that the tracking error should converge to a predefined bound with convergence rate no less than a certain value has been an active research area [21-30].