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Fundamental building block of control systems
A control loop is the fundamental building block of control systems in general and industrial control systems in particular. It consists of the process
Control_loop
How software progresses through its implementation
within the loop body that transfers control outside the loop. Early exit from a loop may be supported via a break statement. A loop inside the loop body of
Control_flow
Branch of engineering and mathematics
are two types of control loop: open-loop control (feedforward), and closed-loop control (feedback). In open-loop control, the control action from the controller
Control_theory
Process where information about current status is used to influence future status
loop. In a feedback loop, the output of a device, process or plant is sampled and applied to alter the input, to better control the output. The loop gain
Feedback
Feedback controller
A closed-loop controller or feedback controller is a control loop which incorporates feedback, in contrast to an open-loop controller or non-feedback
Closed-loop_controller
Control system whose input is independent of output
In control theory, an open-loop controller, also called a non-feedback controller, is a control loop part of a control system in which the control action
Open-loop_controller
System that manages the behavior of other systems
are two types of control loop: open-loop control (feedforward), and closed-loop control (feedback). In open-loop control, the control action from the controller
Control_system
Control loop feedback mechanism
controller, is a feedback-based control loop mechanism commonly used to manage machines and processes that require continuous control and automatic adjustment
PID_controller
Use of various control systems for operating equipment
measurements and output control signals. In the simplest type of an automatic control loop, a controller compares a measured value of a process with a desired set
Automation
Electronic control system
A phase-locked loop (PLL) is a control system that generates an output signal whose phase is fixed relative to the phase of an input signal. Keeping the
Phase-locked_loop
Discipline that uses industrial control to achieve a production level of consistency
weigher Closed-loop controller Control engineering Control loop Control panel Control system Control theory Controllability Controller (control theory) Cruise
Industrial_process_control
Classical method used to design feedback control systems
Minor loop feedback is a classical method used to design stable robust linear feedback control systems using feedback loops around sub-systems within
Minor_loop_feedback
manner is a risk. The control–feedback–abort loop is one method of handling failures. The concept of the Control–Feedback–Abort (CFA) loop is based upon another
Control–feedback–abort_loop
Process control systems and associated instrumentation
though SCADA and PLC systems are scalable down to small systems with few control loops. Such systems are extensively used in industries such as chemical processing
Industrial_control_system
Topics referred to by the same term
up loop in Wiktionary, the free dictionary. Loop or LOOP may refer to: Loop (mobile), a Bulgarian virtual network operator and co-founder of Loop Live
Loop
Function describing the effects of feedback on a control system
In control theory, a closed-loop transfer function is a mathematical function describing the net result of the effects of a feedback control loop on the
Closed-loop_transfer_function
Control flow construct for executing code repeatedly
programming, a loop is a control flow construct that allows code to be executed repeatedly, usually with minor alterations between repetitions. Loops can be used
Loop_(statement)
Electrical signalling scheme
In electrical signalling an analog current loop is used where a device must be monitored or controlled remotely over a pair of conductors. Only one current
Current_loop
Computer system with a dedicated function
Cooperative multitasking is very similar to the simple control loop scheme, except that the loop is hidden in an API. The programmer defines a series of
Embedded_system
Control concept
General negative feedback systems are studied in control systems engineering. Negative feedback loops also play an integral role in maintaining the atmospheric
Negative_feedback
Maintaining a desired system temperature
closed control loop: It continuously measures the current room temperature and compares this to a desired user-defined setpoint, and controls a heater
Temperature_control
Term in control theory
feedback, the plant still has the same transfer function, but a control unit and a feedback loop (with their respective transfer functions) are added to the
Plant_(control_theory)
Variables Control
state variable at the beginning of the period is called a closed-loop control. Control loop Ferguson, Brian S.; Lim, G. C. (1998). Introduction to Dynamic
Control (optimal control theory)
Control_(optimal_control_theory)
Detailed diagram in the process industry
is followed by loop number, which is unique to that loop. For instance FIC045 means it is the Flow Indicating Controller in control loop 045. This is also
Piping and instrumentation diagram
Piping_and_instrumentation_diagram
Programming idiom
In computer programming, an infinite loop (or endless loop) is a sequence of instructions that, as written, will continue endlessly, unless an external
Infinite_loop
Self-managing characteristics of distributed computing resources
Autonomic Systems are closed control loops. This well-known concept stems from Process Control Theory. Essentially, a closed control loop in a self-managing system
Autonomic_computing
Method of tuning a PID controller
ultimate gain K u {\displaystyle K_{u}} , at which the output of the control loop has stable and consistent oscillations. K u {\displaystyle K_{u}} and
Ziegler–Nichols_method
Series of actions for bettering effective usage
refinery, there are hundreds or even thousands of control loops. Each control loop is responsible for controlling one part of the process, such as maintaining
Process_optimization
Topics referred to by the same term
Look up open-loop in Wiktionary, the free dictionary. An open loop or open-loop controller is a control loop or controller that has an absence of feedback
Open_loop_(disambiguation)
Target value for the process variable of a control system
reactor temperature control loop would be well below this limit, even if this means the reactor is running less efficiently. Process control Proportional–integral–derivative
Setpoint_(control_system)
Computerized control system with distributed decision-making
determine control actions that are transmitted through output modules. Field inputs and outputs can be analog signals, such as 4–20 mA DC current loops, or
Distributed_control_system
Data transmission rate management
Open-loop flow control is used by ATM in its CBR, VBR and UBR services (see traffic contract and congestion control). Open-loop flow control incorporates
Flow_control_(data)
Loop performance in control engineering indicates the performance of control loops, such as a regulatory PID loop. Performance refers to the accuracy
Loop_performance
Psychological theory
Perceptual control theory (PCT) is a model of behavior based on the properties of negative feedback control loops. A control loop maintains a sensed variable
Perceptual_control_theory
muscles (e.g. measurable using mechanography). The adaptation (feed-back control loop) of bone according to the maximum forces is considered to be a lifelong
Mechanostat
Approach in control theory to achieve fault-tolerant control for dynamic systems
cause a break-up of the control loop, which must be restructured to prevent failure at the system level. In addition to loop restructuring, the controller
Control_reconfiguration
Control of many individual controllers or control loops
Supervisory control is a general term for control of many individual controllers or control loops, such as within a distributed control system. It refers
Supervisory_control
Aspect of robotics
for force control is parallel force/position control. The control is designed as a cascade control and has an external force control loop and an internal
Force_control
Intentional loss in output voltage of a power supply as it drives a load
output decoupling capacitors have to "absorb" these transients before the control loop has a chance to compensate. A diagram of such transients is shown below
Voltage_droop
Type of predictive controller
feedback loops. The outer control loop feeds the output back to the input, as usual. However, this loop alone would not provide satisfactory control, because
Smith_predictor
Topics referred to by the same term
systems PID controller, a control loop feedback mechanism Control loop, contains all the control elements for controlling a process variable Anti-lock
Controller
Concept in computing
fundamental concept of Control theory, the closed control loop, is among the fundamental principles of autonomic networking. A closed control loop maintains the
Autonomic_networking
generic name given to a small autonomous controller which can control one or several control loops. They are also known as panel mounted, discrete, dedicated
Compact_controller
A networked control system (NCS) is a control system wherein the control loops are closed through a communication network. The defining feature of an NCS
Networked_control_system
American integrated naval weapons system
the AN/SPY-7(V)1 solid state radar and the International Aegis Fire Control Loop (IAFCL) is integrated with Canada's combat management system, CMS 330
Aegis_Combat_System
Combination of electronics and mechanics
system. The brake itself is also one. And the control loop formed by driving control (for example cruise control), engine, vehicle driving speed in the real
Mechatronics
Topics referred to by the same term
continuous mapping of a circle Closed-loop controller, control law that uses knowledge of the state or output Closed-loop transfer function, mathematical function
Closed_loop
Field of automation which studies how to precisely move parts of machines
and one or more prime movers or actuators. Motion control may be open loop or closed loop. In open loop systems, the controller sends a command through
Motion_control
Measuring instruments which monitor and control a process
arrangement was inflexible as each control loop had its own controller hardware, and continual operator movement within the control room was required to view different
Instrumentation
Reference model for military vehicles
and feedback through the executors closes reactive control loops using recently selected control parameters. To meet the demands of dynamic battlefield
4D-RCS Reference Model Architecture
4D-RCS_Reference_Model_Architecture
Section of code that details a specific command
in 1..limit loop <sequence> end loop Fortran 90: DO index = 1,limit <sequence> END DO condition-controlled loop with test at start of loop: Algol 60: for
Statement_(computer_science)
Missile guidance method
angular velocity, the assumption of a constant angular rate, missile control loop limitations, environmental disturbances such as wind, and inherent inaccuracies
Predicted_line_of_sight
Electronic test equipment used to generate electrical waveforms
signal source to test amplifiers or to introduce an error signal into a control loop. Function generators are primarily used for working with analog circuits
Function_generator
Branch of engineering studying process variables
information from a system and changing its parameters, they are a key part of control loops. High demand for engineering professionals is found in fields associated
Instrumentation and control engineering
Instrumentation_and_control_engineering
Combat system for non-AEGIS ships of the US Navy
integration of many disparate sensors and the ability to automate the fire control loop to shorten overall detect-to-engage timeline.[verification needed] SSDS
Ship_Self-Defense_System
Graphical representation of a computer program or algorithm
program. Only the structured control flow has been eliminated. Now consider a more complex example which includes a loop: void print_as_ordered_tuple(const
Control-flow_graph
Software user interface
degree of human control of autonomous weapon systems were laid out by Bonnie Docherty in a 2012 Human Rights Watch report. human-in-the-loop: a human must
Human-in-the-loop
Electric circuit that generates sine waves
output. Instead of using tube overloading to control the amplitude, Meacham proposed a circuit that set the loop gain to unity while the amplifier is in its
Wien_bridge_oscillator
Energy-saving control algorithm for heating boilers
boilers typically fired with fuel oil or natural gas. A hot water reset control loop measures the outside air temperature; this information is used to estimate
Hot_water_reset
Flow-control device
diagnostics to maintain loop performance levels. Improved process control accuracy that reduces process variability. Control valves are classified by
Control_valve
Control systems and control theory based on negative feedback
itself apart. Feedback systems can be combined. In cascade control, one control loop applies control algorithms to a measured variable against a setpoint but
Linear_control
Linear optimal control technique
In control theory, the linear–quadratic–Gaussian (LQG) control problem is one of the most fundamental optimal control problems, and it can also be operated
Linear–quadratic–Gaussian control
Linear–quadratic–Gaussian_control
technique on the finger in 1973 by means of an electro-pneumatic control loop. The control loop is shown in the block diagram: a cuff is placed over the finger
History of continuous noninvasive arterial pressure
History_of_continuous_noninvasive_arterial_pressure
Type of ammeter
rotating a mirror through a galvanometer set-up, often with a servo-like control loop. The name is often abbreviated as galvo. The mirror galvanometer was
Mirror_galvanometer
Mechanism for opening and closing a valve
Power-operated valve actuators may be the final elements of an automatic control loop which automatically regulates some flow, level or other process. Actuators
Valve_actuator
Valve that regulates the flow or pressure of a fluid
even thousands, of control loops all networked together to produce a product to be offered for sale. Each of these control loops is designed to keep
Flow_control_valve
Problem in internal combustion engines
combustion engine contains mechanisms to detect and prevent knocking. A control loop permanently monitors the signal of one or more knock sensors (commonly
Engine_knocking
Computer control of machine tools
Open-loop control works as long as the forces are kept small enough and speeds are not too great. On commercial metalworking machines, closed-loop controls
Computer_numerical_control
Linear feedback control system
Proportional control, in engineering and process control, is a type of linear feedback control system in which a correction is applied to the controlled variable
Proportional_control
Approach to controller design that explicitly deals with uncertainty
the field of control, soon realized the potential tradeoffs between performance in feedback regulation and robustness of stability; high loop gain typically
Robust_control
Linear integrated circuit precision shunt regulator
a functional level the TL431 contains an open-loop operational amplifier that compares the input control voltage with a 2.495 V voltage reference. This
TL431
Management of the rotational speed of a computer fan
allowing manual control. Two such programs are SpeedFan and Argus Monitor. Quiet PC – Type of personal computer PID controller – Control loop feedback mechanism
Computer_fan_control
Electronic flight control system
flaps and engine controls in different situations using a closed feedback loop. The pilot may not be fully aware of all the control outputs acting to
Fly-by-wire
Software loop that processes events
In software, an event loop is an algorithm that continually dispatches control flow for events. The loop requests the next event from an event provider
Event_loop
Segment of the Chicago "L"
The Loop (historically Union Loop) is the 1.79-mile-long (2.88 km) circuit of elevated rail that forms the hub of the Chicago "L" system in the United
The_Loop_(CTA)
Rail loop for turning vehicles
A balloon loop, turning loop, or reversing loop (North American Terminology) allows a rail vehicle or train to reverse direction without having to shunt
Balloon_loop
Electronic control system
A frequency-lock, or frequency-locked loop (FLL), is an electronic control system that generates a signal that is locked to the frequency of an input or
Frequency-locked_loop
Electronic circuit to automatically adjust signal strength
Automatic gain control (AGC), sometimes Automatic volume control (AVC) is a closed-loop feedback regulating circuit in an amplifier or chain of amplifiers
Automatic_gain_control
an enterprise generally consists of a series of interconnected control loops. Each loop starts by developing a plan, the plan is then executed, and the
Functional_database_model
Solid-fuel rocket motor that can restart
of Guidance, Control, and Dynamics. 46 (7): 1425–1436. doi:10.2514/1.G006882. Landis, Mark A. (2001). "Overview of the Fire Control Loop Process for Aegis
Pulsed_rocket_motor
Process of controlling orientation of an aerospace vehicle
attitude control such as the gravity-gradient stabilization, most spacecraft make use of active control which exhibits a typical attitude control loop. The
Spacecraft attitude determination and control
Spacecraft_attitude_determination_and_control
Power supply with switching regulator
separate inductor. ^1 Flyback converter logarithmic control loop behavior might be harder to control than other types. ^2 The forward converter has several
Switched-mode_power_supply
Control paradigm in which errors are measured before they can affect a system
required to facilitate this type of control. Open-loop control and feedback control, often based on canned PID control algorithms, are much more widely used
Feed_forward_(control)
Aircraft which flies without a human pilot
forked from. UAVs employ open-loop, closed-loop or hybrid control architectures. Open loop – This type provides a positive control signal (faster, slower, left
Autonomous_aircraft
Measure of how a closed loop transfer function is affected by parameter changes
function in a basic closed loop control system written in the Laplace domain using unity negative feedback. The closed-loop transfer function is given
Sensitivity_(control_systems)
in living systems the reference variable for each feedback control loop in a control hierarchy is generated within the system, usually as a function of
William_T._Powers
Robot control by visual feedback
end-point closed-loop control, where the camera is fixed in the world and observing the target and the motion of the hand. Visual Servoing control techniques
Visual_servoing
Rate-seeking algorithm
exponential backoff algorithm is a form of closed-loop control system that reduces the rate of a controlled process in response to adverse events. For example
Exponential_backoff
Graphical method of determining the stability of a dynamical system
plot of the open loop systems, it can be applied without explicitly computing the poles and zeros of either the closed-loop or open-loop system (although
Nyquist_stability_criterion
Engineering discipline that deals with control systems
aspect of control engineering, control engineers may also work on the control of systems without feedback. This is known as open loop control. A classic
Control_engineering
Computing joint values of a kinematic chain from a known end position
kinematics are required, such as if the IK is solved inside a high-rate control loop. Many industrial 6DOF robots feature three rotational joints with intersecting
Inverse_kinematics
of control flow is the loop which causes a block of code to be executed more than once. A common idiom is to have a loop nested inside another loop, with
Inner_loop
2004 single by Asian Kung-Fu Generation
"Loop & Loop" (ループ&ループ, Rūpu&Rūpu) is a song by the Japanese rock band Asian Kung-Fu Generation. It was the second single released from their second full-length
Loop_&_Loop
for each time-interval and compared with the actual values for closed-loop control. Positive cumulative deviation for a certain time-interval requires no
Cumulative quantities (logistics)
Cumulative_quantities_(logistics)
Type of textile fastener
Velcro is a brand of versatile fastening devices, known as hook-and-loop fasteners, hook-and-pile fasteners, or touch fasteners, that allow two surfaces
Velcro
Undesirable cyclic variations in voltage or current within an electronic device
velocity control in engines. The Barkhausen stability criterion gives the necessary condition for oscillation; the loop gain around the feedback loop, which
Parasitic_oscillation
Concept of human-technology interaction
instance. But, this is an open-loop control. UIL actually allows closed loop control, i.e. having the user IN the loop.[clarification needed] Faced with
User-in-the-loop
Testing approach within software engineering
with a single device can include several control loops. The amount of effort put into operating a control loop is seen as an indicator for the usability
Component-based usability testing
Component-based_usability_testing
Technique used in the development and testing of complex real-time embedded systems
Hardware-in-the-loop (HIL) simulation, also known by various acronyms such as HiL, HITL, and HWIL, is a technique that is used in the development and testing
Hardware-in-the-loop simulation
Hardware-in-the-loop_simulation
American engineer (1909–1997)
method, co-authored with Nathaniel B. Nichols. "Co-Creator of Control Loop Tuning Equation Dies". Control Engineering. Retrieved July 27, 2015. v t e
John_G._Ziegler
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CONTROL LOOP
CONTROL LOOP
Boy/Male
Tamil
Check, Control
Boy/Male
Indian, Sanskrit
Control of the Senses; Self-control
Boy/Male
Hindu, Indian
Control
Boy/Male
Hindu
Check, Control
Boy/Male
Gaelic Irish Celtic
Wise.
Boy/Male
Indian, Punjabi, Sikh
Light of Control
Boy/Male
Muslim/Islamic
Always in control
Boy/Male
Hindu, Indian, Sanskrit
Under Control
Male
English
Wise Man
Boy/Male
Hindu, Indian, Sanskrit
Agree; Control
Surname or Lastname
English (mainly central England)
English (mainly central England) : patronymic from a pet form of the personal name Thomas.
Boy/Male
Gujarati, Hindu, Indian, Punjabi, Sikh
Master; Authority; Power; Control
Boy/Male
Muslim
Prince, Always in control
Boy/Male
Gujarati, Hindu, Indian
Self Control
Boy/Male
Indian, Sikh
Who Control Love
Girl/Female
Hindu, Indian
Self Control; Having Complete Control on All the Senses
Girl/Female
Hindu, Indian
To have Control
Girl/Female
Tamil
Self control having complete control on all the senses
Boy/Male
Indian
Control; Patient
Boy/Male
Italian Spanish
Mountain. Abbreviation of Montague and Montgomery.
CONTROL LOOP
CONTROL LOOP
CONTROL LOOP
CONTROL LOOP
CONTROL LOOP
CONTROL LOOP
CONTROL LOOP
n.
Exercise of authority; control; government; arrangement.
n.
Control over one's own feelings, temper, etc.; self-control.
v. t.
To check by a counter register or duplicate account; to prove by counter statements; to confute.
v. t.
To restrain; to control; to check.
p. pr. & vb. n.
of Control
superl.
Difficult to resist or control; powerful.
n.
Control of one's self; restraint exercised over one's self; self-command.
n. & v.
See Control.
imp. & p. p.
of Control
n.
Authority; jurisdiction; control.
n.
Disposal; control; license.
v. i.
To control one's self when provoked.
n.
Rule; dominion; control.
v. t.
To exercise restraining or governing influence over; to check; to counteract; to restrain; to regulate; to govern; to overpower.
adv.
In an independent manner; without control.
n.
A counter account. See Control.
n.
Power or authority to check or restrain; restraining or regulating influence; superintendence; government; as, children should be under parental control.
n.
That which serves to check, restrain, or hinder; restraint.
n.
A duplicate book, register, or account, kept to correct or check another account or register; a counter register.
n.
One who, or that which, controls or restraines; one who has power or authority to regulate or control; one who governs.
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