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an analog or digital computing device for the determination of the coordinates of a point moving continuously along an analytically given curve.

Interpolators are used as control devices in programmed control systems; the output signals of the interpolator act directly or with the help of intermediate carriers (perforated or magnetic tapes) on the drive mechanism of the working tool of the controlled object (for example, a metal-cutting lathe), with the result that the working tool moves in space or in a plane along the required curve. The method for giving the parameters of the curve depends on the type of interpolator and the method used to solve the equation of the curve.

The simplest interpolators are continuous-action (analog) interpolators for determining straight-line segments potentiometers, certain types of compensators). A potentiometer in the circuit of a linear interpolator controls the motion of the working tool along one coordinate axis. The voltage supplied to the potentiometer is proportional to the length of the segment to be worked, whereas the voltage taken off by the slide of the potentiometer is proportional to the coordinate of the moving point, that is, to the required displacement of the working tool.

A discrete-action (digital) interpolator is a computing device whose initial data are coded (binary, decimal) numbers and whose output signal is a series of uniform discrete electrical pulses or simple phase shifts, each of which causes an elementary movement of the working tool of the device being controlled. The basic elements of discrete interpolators are digital integrators, various combinations of which form interpolators that work out straight lines, circles, hyperbolas, parabolas, and other figures.


Chernyshev, A. V., and A. B. Iakhin. Avtomatizatsiia obrabotki na metal-lorezhushchikh stankakh s primeneniem programmnogo upravleniia. Moscow, 1959.
Tsifrovye analogi dlia sistem avtomaticheskogo upravleniia. Moscow-Leningrad, 1960.
References in periodicals archive ?
Also is a moderately quick deterministic interpolator that is inexact (Surfer 8 Manual 2006; Luo et al.
Principal Source Data and Estimating Methods Used in Preparing Estimates of Current-Dollar GDP Annual estimates: Source data and methods used to determine level for benchmark and other years or used to prepare Component an extrapolator or interpolator Income side (Gross national income of $10,221.
The Avago AEDR-850x reflective encoders integrate an LED light source, photodetecting and interpolator circuitry, and the three channels in a single package with a 3.
Source Data and Methods for Current- Dollar GDP and Current-Dollar GDI Component Annual estimates: Source Current quarterly data and methods used to estimates: Source data determine level for and methods used to benchmark and other prepare an extrapolator' years or used to prepare an extrapolator or interpolator Gross domestic product of $14,526.
REVOLUTION True changes the economics of colour correction by using the embedded IBM PowerPC processor of the Virtex-II Pro to host a software interpolator capable of interpolating every possible colour value using only a small amount of input data.
An example of a spatial interpolator that uses only absolute location is trend surface analysis in which a z-value is a function of its (x,y) coordinate location.
Recognizing this important manufacturing trend, Siemens has developed and embedded a universal interpolator within the CNC, capable of directly executing NURBS defined geometries and eliminating the need for a postprocessor.
This version also introduces the Multi-Attribute Well Interpolator (MAWI) application, which provides a new and better method for building low frequency geologic models driven by seismic attributes.
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Eliminating the DWG-to-PLT conversion step saves tremendous amounts of time and, since the conversion of each DWG file is done directly within AutoCAD instead of a single interpolator, there are no interpolation errors.
Kriging (KG) is the only stochastic interpolator that uses regionalized variable theory to optimize the interpolation.