variable (quantity)

actual value

desired value

deviation

vector (of variables)

input variable

output variable

state variable

trajectory

analogue variable

digital variable

binary variable

state equations

output equations

input matrix

output matrix

system matrix

transition matrix

direct input-output matrix

system

structure

system parameter

linear system

linearize, verb

characteristic equation

time-invariant system

multivariable system

distributed-parameter system

control

stability

asymptotic stability

controllability

observability

action

interface

model

algorithm

redundancy

manual, adjective

automatic

degree of automation

automaton

process (in control technology)

technical process

plant

cybernetics

expert system

knowledge base

inference engine

white noise

signal

information parameter

analogue signal

digital signal

binary signal

quantize, verb

sampled signal

aliasing

measure, verb

count, verb

monitor, verb

indicate, verb

alert, verb

record, verb

log, verb

manipulate, verb

evaluate, verb

optimize, verb

intervene, verb

manipulate by hand, verb

safeguard, verb

structure, verb

configure, verb

parameter, verb

automate, verb

functional diagram

functional block

action path

action line

direction of action

summing point

branching point

chain structure

parallel structure

loop structure

principle of superposition

principle of shifting

transfer element

linear transfer element

time-invariant transfer element

identification (of a system)

transient (behaviour)

time response

steady state, noun

characteristic curve

operating point

saturation

limitation

dead band

hysteresis

reset windup

damping

damping ratio

unit-pulse response

step response

unit-step response

ramp response

unit-ramp response

time constant

pulse-function sequence

equivalent dead-time

equivalent time constant

step response time

settling time

overshoot

transfer function

Z-transfer function

frequency response

gain

logarithmic gain

gain response

phase angle

phase response

frequency response characteristic

corner (angular) frequency

frequency response locus

describing function

rational transfer element

minimal-phase element

all-pass element

controlled system with self-regulation

controlled system without self-regulation

control rise time

control settling time

open-loop frequency response

gain crossover (angular) frequency

phase margin

phase crossover (angular) frequency

gain margin

control factor

Nichols plot

root locus plot

phase plan analysis

reference-variable response of the control system

disturbance response of the control system

hunting (in automatic control)

closed-loop control

open-loop control

closed action path

closed action

open action path

open action

forward path

feedback path

disturbance feedforward control

reference-variable feedforward control

control loop

control chain

continuous (feedback) control

multi-position control

sampling control

sampling period

fixed set-point control

time scheduled closed-loop control

follow-up control

cascade control

secondary control

ratio control

state-feedback control

output-feedback control

distributed feedback control

observer

observer-based control

model-based control

modal control

multivariable control

decoupling

decentralized control

centralized control

hierarchical control

optimal control

adaptive control

parameter identification

parameter sensitivity

robust control

disturbance estimation

prediction

limiting control

alternative control

split-range control

switching control

computer control

time-shared control

position algorithm

velocity algorithm

fuzzy control

membership function

rule-based control

sequential control

process-oriented sequential control

time-oriented sequential control

reset circuit

pole assignment

controlled variable

reference variable

feedback variable

error variable

steady-state error variable

controller output variable

manipulated variable

disturbance variable

command variable

final controlled variable

measuring range

measuring span

range of the controlled variable

range of the reference variable

range of the final controlled variable

range of the manipulated variable

manipulating time

range of the disturbance variable

checkback signal

enabling signal

interlock signal

controlled system

controlling system

comparing element

controlling element

measuring element (in control technology)

control system

actuator

final controlling element

final controlling equipment

reference-variable generator

controller (for closed-loop control)

lag element

first-order lag element

second-order lag element

lead-lag element

proportional element

proportional action coefficient

proportional band of a controller

integral element

integral action coefficient

integral action time

proportional plus integral element

reset time

derivative element

derivative action coefficient

derivative action time

proportional plus derivative element

rate time

derivative action gain

proportional plus integral plus derivative element

multi-position element

two-position element

on-off element

three-position element

switching value

differential gap

neutral zone

limit monitor

sampling element

holding element

dead-time

dead-time element

switching system

switching element

switching function

combinatorial circuit

sequential circuit

state transition table

transition function

output function

state table

decision table

state graph

Boolean operation

binary-logic element

storage element

bistable element

dynamic input (in switching systems)

triggered bistable element

monostable multivibrator

binary delay element

register

counter

function chart (for sequential control)

step

transition

transition condition

sequence chain

beginning of sequence selection

end of sequence selection

beginning of simultaneous sequences

end of simultaneous sequences

command (in a function chart)

stored command

conditional command

delayed command

time-limited command

waiting time

check time

process computer system

central process computer system

hierarchical process computer system

redundant process computer system

distributed process computer system

process interface

real-time capability

interrupt capability

restart capability

real-time operating system

process interfacing

process monitoring system

process peripherals

analogue output unit

digital output unit

analogue input unit

digital input unit

timer

interrupt input unit

interrupt reaction time

input transfer rate

output transfer rate

operating mode

manual operation

automatic operation

semi-automatic operation

step-setting operation

time program

priority

control structure

centralized control structure

decentralized control structure

hierarchical control structure

control level

individual control level

group control level

plant control level

distributed control structure

process control function

item under consideration

functional unit

physical unit

signal generator

filter element

adjuster

control device

time scheduler

clock generator

bus

ring

star

protocol

bus coupler

memory

adding element

multiplying element

dividing element

function generator

square-root element

squaring element

absolute-value generator

sign generator

actuating drive

positioner

indicating element

output element

decoupled output

conditions of operation

active fault (in control equipment)

passive fault (in control equipment)

control equipment

programmable controller

storage-programmable logic controller

programmed control

hardwired programmed logic control

non-clocked control

clocked control

sensor

transducing element

measuring transducer

measuring transmitter

(control) transformer

barrier

amplifier

operational amplifier

magnetic amplifier

converter

analogue-to-digital converter

digital-to-analogue converter

serial-to-parallel converter

parallel-to-serial converter

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