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A qualitative assessment of freedom from error or of the degree of conformity to a desired value, a high assessment corresponding to a small error.
active accommodation
Type of control in which the combination of sensor outputs, control commands, and robot motion is used to achieve alteration of a robot's preprogrammed motions in response to sensed inputs (e.g, used to stop a robot when forces reach set levels, or to perform force feedback tasks like insertions, door opening and edge tracing).
active devices
Devices which require a power supply independent of the value of input signals.
active output
Output the power of which in all possible states of the device is derived from supply power.
actual conditions
Conditions observed during operation.
actuator
A power mechanism used to effect motion of the robot (e.g. a motor which converts electrical, hydraulic or pneumatic energy to effect motion of the robot).
On a display surface, a circle or other pattern of light used to indicate the area in which the presence of a light-pen can be detected at a given time.
alignment function character
The character ":" used as the address character for a sequence number word that indicates a block in a control tape after which are recorded the data necessary for machining to be commenced or recommenced.
Any device that increases the magnitude of an applied signal. It receives an input signal and delivers a larger output signal that, in addition to its increased amplitude, is a replica of the input signal.[1][b]
analog data
Data a represented by a physical quantity that is considered to be continuously variable and whose magnitude is made directly proportional to the data or to a suitable function of the data.
analog input channel amplifier
An amplifier attached to one or more analog input channels, that adapts the analog signal level to the input range of the succeeding analog-to-digital converter.
analog input channel (in process control)
The analog data path between the connector and the analog-to-digital converter in the analog input subsystem.[c]
analog output channel amplifier
An amplifier attached to one or more analog output channels, that adapts the output signal range of the digital-to-analog converter to the signal level necessary to control the technical process.[d]
analog representation
A representation of the value of a variable by a physical quantity that is considered to be continuously variable, the magnitude of the physical quantity being made directly proportional to the variable or to a suitable function of the variable.
analogue anplifier
Amplifier the output of which is continuously variable with the applied control signal.
anisochronous transmission
A data transmission process in which there is always an integral number of unit intervals between any two significant instants in the same group; between two significant instants located in different groups, there is not always an integral number of unit intervals.[e]
answering
The process of responding to a calling station to complete the establishment of a connection between data stations.
anti-vibration mounting
Device for insulating machine vibrations from the structure upon which it is mounted.
An interconnected set of links and powered joints comprising members of longitudinal shape which supports, positions and orientates the wrist and/or an end effector.
articulated structure
Set of links and joints which constitutes the arm and the wrist.
asynchronous transmission
Data transmission in which the time of occurrence of the start of each character, or block of characters, is arbitrary; once started, the time of occurrence of each signal representing a bit within the character, or block, has the same relationship to significant instants of a fixed time base.
attained pose
The pose achieved by the robot in response to the command pose.
automatic
Pertaining to a process or device that, under specified conditions, functions without human intervention.
The mode of operation of a numerically controlled machine in which it operates in accordance with the control data until stopped by the program or the operator.
automation
The implementation of processes by automatic means.
axis
1. A direction in which a part of a robot can move in a linear or rotary mode. The number of axes is normally the number of guided and mutually independently driven links.[h]
2. A direction in which a part of a machine can move in a linear or rotary mode.
^Networks may allow a user to designate a given number of abbreviated address codes. The allocation of abbreviated address codes to a destination or group of destinations may be changed as required by means of a suitable procedure.
^Energy may be fluid power as well as electric energy.
^This path may include a filter, an analog signal multiplexer, and one or more amplifiers.
^If there is a common digital-to-analog converter in the subsystem, the amplifier performs the function of a sample-and-hold device.
^The call may be established whether or not the called DTE is attended.
^The selection signal is generated by the data terminal equipment. A limit may be imposed by the design criteria of the network to prevent more than a permitted number of unsuccessful call attempts to the same address within a specified period of time.
^Axis is also used to describe a mechanism of a robot.
This article incorporates text from this source, which is in the public domain: IS 15571: Industrial automation glossary. New Delhi, Bureau of Indian Standards. 2005.
This article incorporates text from this source, which is in the public domain: IS 15571: Industrial automation glossary. New Delhi, Bureau of Indian Standards. 2005.