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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
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 controller
Closed-loop_controller
Fundamental building block of control systems
common classes of control loop: open loop and closed loop. In an open-loop control system, the control action from the controller is independent of the process
Control_loop
Branch of engineering and mathematics
control loop: open-loop control (feedforward), and closed-loop control (feedback). In open-loop control, the control action from the controller is independent
Control_theory
System that manages the behavior of other systems
logic controller, is used.[clarification needed] Fundamentally, there are two types of control loop: open-loop control (feedforward), and closed-loop control
Control_system
Control loop feedback mechanism
proportional–integral–derivative (PID) controller, or three-term controller, is a feedback-based control loop mechanism commonly used to manage machines
PID_controller
Function describing the effects of feedback on a control system
{G(s)}{1+G(s)H(s)}}} Federal Standard 1037C Open-loop controller Control theory § Open-loop and closed-loop (feedback) control This article incorporates
Closed-loop_transfer_function
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)
Topics referred to by the same term
promoting online education Open Location Code, a system for identifying a place on Earth Open-loop controller, a system controller that does not use feedback
OLC
Control concept
Open-loop controller – Control system whose input is independent of output Perceptual control theory – Psychological theory Positive feedback – Loop that
Negative_feedback
Internal combustion engine sensor
provides the open-loop controller predicted air flow information (the measured air flow) to the ECU, and the oxygen sensor provides closed-loop feedback in
Mass_flow_sensor
Discipline that uses industrial control to achieve a production level of consistency
predetermined objectives, utilizing concepts like feedback loops, stability analysis and controller design. On the other hand, the physical apparatus of IPC
Industrial_process_control
Electromagnetism Open-circuit test Open-loop controller Power-to-weight ratio Two-phase system Inchworm motor Starter Voltage controller People Arago Barlow
Flux_switching_alternator
Scottish philosopher and psychologist (1914–1945)
an open-loop controller that operate for ~0.2 seconds ("ballistic movement"). As the human learns, the motion performed by the open-loop controller becomes
Kenneth_Craik
Process control systems and associated instrumentation
simplest control systems are based around small discrete controllers with a single control loop each. These are usually panel mounted, which allows direct
Industrial_control_system
with the manual controllers. The actuation of an electronic boost controller can be managed by one of two control systems: Open-loop is the simpler option
Boost_controller
Type of machine
Electromagnetism Open-circuit test Open-loop controller Power-to-weight ratio Two-phase system Inchworm motor Starter Voltage controller People Arago Barlow
Newman's_energy_machine
Field of automation which studies how to precisely move parts of machines
motion controller, an energy amplifier, and one or more prime movers or actuators. Motion control may be open loop or closed loop. In open loop systems
Motion_control
Camera that captures photographs or video in digital format
intent to adjust the focus of a camera's objective lens accordingly (open-loop controller). The rangefinder and lens focusing mechanism may or may not be coupled
Digital_camera
Type of motor
benefit of an open-loop stepper motor is its relatively low cost. There is also no need to tune the feedback controller on an open-loop stepper system
Servomotor
ways to come to an H∞ controller: A Youla-Kucera parametrization of the closed loop often leads to very high-order controller. Riccati-based approaches
H-infinity methods in control theory
H-infinity_methods_in_control_theory
Measure of how a closed loop transfer function is affected by parameter changes
variations in the plant parameters affects the closed-loop transfer function. Since the controller parameters are typically matched to the process characteristics
Sensitivity_(control_systems)
Problem in control theory
Finally, since the controller is based upon cancelling plant poles and zeros, these must be known precisely, otherwise the controller will not be deadbeat
Dead-beat_control
Computer standard for SATA host controllers
the SATA controller (in BIOS) is inadvertently switched to AHCI mode after OS installation. In Microsoft Windows the symptom is a boot loop which begins
Advanced Host Controller Interface
Advanced_Host_Controller_Interface
Data transmission rate management
controls; the controller and a regulator. The regulator is able to alter the input variable in response to the signal from the controller. An open-loop system
Flow_control_(data)
coils. An open-loop V/f control works well in applications with near-constant load torque and gradual changes in rotational speed. The controllers implementing
Scalar_control
Medical device
expiratory flow can be commanded by an open-loop controller or a closed-loop controller: when the expiratory flow is open-loop controlled, it is fast initially
Liquid_ventilator
Computer control of machine tools
either an open-loop or a closed-loop system. In an open-loop system, communication takes place in one direction only: from the controller to the motor
Computer_numerical_control
Device for regulating the performance of a motor
motor controller is a device or group of devices that can coordinate in a predetermined manner the performance of an electric motor. A motor controller might
Motor_controller
Process where information about current status is used to influence future status
common general-purpose controller using a control-loop feedback mechanism is a proportional-integral-derivative (PID) controller. Heuristically, the terms
Feedback
Programmable digital computer used to control machinery
composed of relays, cam timers, drum sequencers, and dedicated closed-loop controllers. The hard-wired nature of these components made it difficult for design
Programmable_logic_controller
Technique used in the development and testing of complex real-time embedded systems
Du, Y. Wang, C. Yang, and H. Wang, "Hardware-in-the-loop simulation approach to testing controller of sequential turbocharging system", Proceedings of
Hardware-in-the-loop simulation
Hardware-in-the-loop_simulation
Internet protocol
to allow direct access to the internal register of an Ethernet switch controller (ASIC) over an Ethernet network itself. This approach allows to avoid
Realtek Remote Control Protocol
Realtek_Remote_Control_Protocol
In-cab signalling and train protection system
operates by exchanging telegrams between the central controller and the trains. The central controller transmits a "call telegram" using Frequency-shift
Linienzugbeeinflussung
Error condition in a proportional–integral–derivative controller
selected output to the integral circuit of all controllers in the selection scheme so that a closed loop is maintained. "Microchip Application Note AN532:
Integral_windup
DJ software
VST-compliant effect or software synthesizer, and can be controlled by most MIDI controllers. Deckadance was created by Image-Line as a mixing application for DJs
Deckadance
Digital audio workstation
FL Studio (previously known both as FrootyLoops and FruityLoops) is a digital audio workstation (DAW) developed by the Belgian company Image-Line. It
FL_Studio
Variables Control
function). A control given as a function of time only is referred to as an open-loop control. In contrast, a control that gives optimal solution during some
Control (optimal control theory)
Control_(optimal_control_theory)
Programming language for industrial controllers
programmable logic controller, the rules are typically executed sequentially by software in a continuous loop, or "scan". By executing the loop fast enough,
Ladder_logic
Family of control systems
a controller on a single data set. This approach is often implemented off-line (see below). Since, on practical industrial applications, open-loop or
Data-driven_control_system
Routing of signals back to their source
Loopback (also written loop-back) is the routing of electronic signals or digital data streams back to their source without intentional processing or modification
Loopback
Control systems and control theory based on negative feedback
error to generate a proportional output. A PI controller can be used to overcome this. The PI controller uses a proportional term (P) to remove the gross
Linear_control
Standard for serial communication between devices without host computer
A controller area network (CAN) is a vehicle bus standard designed to enable efficient communication primarily between electronic control units (ECUs)
CAN_bus
Valve that regulates the flow or pressure of a fluid
the process variable and its relationship to some desired set point. A controller then processes this information and decides what must be done to get the
Flow_control_valve
Use of various control systems for operating equipment
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 value and
Automation
Engineering discipline that deals with control systems
behavior of other devices or systems using control loops. It can range from a single home heating controller using a thermostat controlling a domestic boiler
Control_engineering
Open radio access network standard
allocation. The CU handles functions such as SDAP and RRC. RAN Intelligent Controller (RIC) is an optional virtualized optimization technology for 5G. It adds
Open_RAN
Art of using musical software controllers
Controllerism is the art and practice of using musical software controllers, e.g. MIDI, OSC, DJ controller, joystick, etc., to build upon, mix, scratch
Controllerism
Overview of and topical guide to control engineering
Simulink Embedded controller Closed-loop controller Lead-lag compensator Numerical control PID controller Programmable logic controller Automation and remote
Outline of control engineering
Outline_of_control_engineering
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
Approach to controller design that explicitly deals with uncertainty
shape the loop gain across frequencies, as well as the closed loop characteristics of a feedback interconnection of a linear plant and controller, has been
Robust_control
Positions of a closed-loop transfer function's poles in the s-plane
theory, closed-loop poles are the positions of the poles (or eigenvalues) of a closed-loop transfer function in the s-plane. The open-loop transfer function
Closed-loop_pole
introduce controller functions ( G ( s ) {\displaystyle G(s)} ) and tune their parameters, a process called Loop Shaping, until the best possible controller is
Quantitative_feedback_theory
Robotic arm manufacturer
closed loop control but differs from servo control in that the stepping motors run essentially open loop with the potential to close the loop in case
ST_Robotics
Type of detection system
traffic signal controller signifying the passage or presence of a vehicle. Parking structures for automobiles may use inductive loops to track traffic
Induction_loop
the controller would act to open the TCV to increase the flow of heating medium thereby raising the temperature of the first fluid. The controller (TIC)
Instrumentation in petrochemical industries
Instrumentation_in_petrochemical_industries
Flow-control device
control a process Proportional–integral–derivative controller, also known as PID controller – Control loop feedback mechanismPages displaying short descriptions
Control_valve
Relationship between devices in which one controls the other
controller–target controller–device host–worker host–proxy leader–follower director–performer boss–worker primary–replica principal–agent controller–worker
Master–slave_(technology)
Electronic invention tool and toy
Using a circuit board, alligator clips, and a USB cable, the toy uses closed loop electrical signals to send the computer either a keyboard stroke or mouse
Makey_Makey
Measuring instruments which monitor and control a process
control focus, this arrangement was inflexible as each control loop had its own controller hardware, and continual operator movement within the control
Instrumentation
Underwater diving using self contained breathing gas recycling apparatus
the diver's chest. Some CCR electronic controllers are not compatible with being left running while the loop is not in use, and will try to achieve the
Rebreather_diving
Electronic circuit that control motor speed
bicycle controllers generally use brake application sensors and pedal rotation sensors, and provide potentiometer-adjustable motor speed, closed-loop speed
Electronic_speed_control
American artist and musician
software. Rucyl improvises during her live performances using MIDI controllers, loopers, diy software and hardware, and effects processors. Rucyl was an
Rucyl
Control system for the motion of a mechanical system
positioning, owing to their construction, and this is generally used in an open-loop manner without feedback. They are generally used for medium-precision
Servomechanism
Cloud gaming service
up to 40. While Stadia could use any HID-class USB controller, Google developed its own controller, which connected via the user's Wi-Fi directly to the
Google_Stadia
the closed-loop step responses will remain almost constant for different values of the controller gain. This will ensure that the closed-loop system is
Iso-damping
Stability criterion in control theory
closed loop poles as the gain K {\displaystyle K} is varied. The value of K {\displaystyle K} does not affect the location of the zeros. The open-loop zeros
Root_locus_analysis
German electronics and software company
so that they fit specific applications is an integral part of ECU and controller development. To achieve this, the parameters of the ECUs are adjusted
DSPACE_(company)
British software company
BT MeetMe Mobile Controller, BT MeetMe Desktop Controller, and BT MeetMe Add-in for Outlook. In 2012, Ring2 changed its name to LoopUp and added support
LoopUp
electronics, the output will place a 'Call' to the controller as if a vehicle is present on the loop detector. Video (both normal and infrared) uses changes
Signal_timing
Detector for fluid pressure
larger than the restriction orifice in order to work. The high gain of the open loop mechanism can be made linear using a pressure feedback bellows on the
Nozzle_and_flapper
Method to control electric motors
Inverters can be implemented as either open-loop sensorless or closed-loop FOC, the key limitation of open-loop operation being minimum speed possible
Field-oriented_control
Computerized control systems with distributed decision-making
system for a process or plant usually with many control loops, in which autonomous controllers are distributed throughout the system, but there is no central
Distributed_control_system
Open-source container software
default Kubernetes scheduler according to their needs. A controller is a reconciliation loop that drives the actual cluster state toward the desired state
Kubernetes
Type of denial-of-service software attack
system's process table. A basic implementation of a fork bomb is an infinite loop that repeatedly launches new copies of itself. In Unix-like operating systems
Fork_bomb
New York City Subway station, 1904–1945
The City Hall station, also known as City Hall Loop station, is a closed station on the IRT Lexington Avenue Line of the New York City Subway. It is located
City Hall station (IRT Lexington Avenue Line)
City_Hall_station_(IRT_Lexington_Avenue_Line)
Free virtualization and emulation software
Virtual I/O network adapter, SCSI controller, and serial interface sPAPR non-volatile RAM On the sPAPR target, another Open-Firmware-compatible BIOS is used
QEMU
Open source web application framework
myVar is defined in a controller and this variable was marked for watching, Angular would monitor the changes on myVar in each loop iteration. This approach
AngularJS
Educational console
tablet integrated controllers or microphones.[citation needed] The V.Motion is a variant that includes motion-sensitive controllers and has titles designed
V.Smile
Early banking specific computer equipment
'in' port of the loop card in the same controller. Data can only travel around the loop in a single direction. Each device on the loop uses switches to
IBM_banking_equipment
Digital audio workstation
available bundled with a range of music production hardware, including MIDI controllers and audio interfaces. Live was created by Gerhard Behles, Robert Henke
Ableton_Live
2026 video game
game's Japan setting and open-world design, describing it as a strong showcase for the series' driving and exploration loop. Eurogamer's Dom Peppiatt
Forza_Horizon_6
Cellular network standard
Management Mobility management Radio Network Controller UMTS WCDMA "X.225 : Information technology – Open Systems Interconnection – Connection-oriented
Radio_Resource_Control
Industrial automation protocol
automation open protocol. Its most notable advantage is that it can communicate over legacy 4–20 mA analog instrumentation current loops, sharing the
Highway Addressable Remote Transducer Protocol
Highway_Addressable_Remote_Transducer_Protocol
Control paradigm in which errors are measured before they can affect a system
There are three types of control systems: open-loop, feed-forward, and feedback. An example of a pure open-loop control system is manual non-power-assisted
Feed_forward_(control)
Open-source autopiloting library
versions of ArduPilot used the APM (ArduPilotMega) flight controller, an AVR CPU running the Arduino open-source programming language (which explains the "Ardu"
ArduPilot
Open-source robot simulator
and force sensor, LEDs, grippers, gyros, compass, IMU, etc. The robot controller programs can be written outside of Webots in C, C++, Python, ROS, Java
Webots
detector interface panel, to connect to loop detectors and other detectors; detector amplifiers; the controller itself; a conflict monitor unit; flash
Traffic light control and coordination
Traffic_light_control_and_coordination
Statistical methods to build mathematical models of dynamical systems from measured data
performance of the closed-loop system, which is the one comprising the physical system, the feedback loop and the controller. This performance is typically
System_identification
2023 video game
allowed the use of guitar controllers, microphones, and MIDI drum kits, adding new features designed with the controllers in mind, and allowing the game
Fortnite_Festival
Open-source prototyping platform
GPLv2. Electronics portal Free and open-source software portal Arduino BASIC Stamp Fritzing Gumstix Make Controller Kit OOPic PICAXE Processing Rabbit
Wiring_(software)
Synchronous electric motor powered by an electronic controller
closed loop in which parasitic currents can flow, preventing such losses. Aside from the higher impedance of the wye configuration, from a controller standpoint
Brushless_DC_electric_motor
3D printer design nonprofit organization
Retrieved 2026-01-01. Isik's Tech (2025-10-05). Closed-loop FOC with Klipper - Ouroboros Servo Controller. Retrieved 2026-01-01 – via YouTube. Baltojikale (2021-02-18)
Voron_Design
Abstract representation of movement
account of movement control. In contrast to the open-loop response-chaining hypothesis, Adams' closed-loop theory suggested that processing of afferent information
Motor_program
Linear integrated circuit precision shunt regulator
the cathode to the anode. On a functional level the TL431 contains an open-loop operational amplifier that compares the input control voltage with a 2
TL431
Aircraft which flies without a human pilot
Closed loop – This type incorporates sensor feedback to adjust behavior (reduce speed to reflect tailwind, move to altitude 300 feet). The PID controller is
Autonomous_aircraft
2008 video game
constraints imposed: the game had to be playable with a controller, support multiplayer and have a core game loop with a victory and a high score. The original
Dark_Room_Sex_Game
Method of controlling spacecraft
degrees of freedom (DOF) in open loop and closed loop control using linearized controllers and a nonlinear sliding mode controller. Former Space Systems Lab
Electromagnetic formation flight
Electromagnetic_formation_flight
Motion Control Loop, the Orchestra GCode, the ControllerSupervisor and the Logical Control Loop. Using information from the ControllerSupervisor, it selects
Orchestra_Control_Engine
Digital audio recording studio
sequencer, virtual instrument host, non-linear video arranger, and music loop recording program. Acoustica has developed three editions of Mixcraft: Mixcraft
Mixcraft
OPEN LOOP-CONTROLLER
OPEN LOOP-CONTROLLER
Surname or Lastname
English
English : variant of Penn.Dutch : metonymic occupational name for a clerk or penman, from Dutch pen ‘pen’.Cambodian : unexplained.
Female
English
English short form of Latin Penelope, PEN means "weaver of cunning."
Boy/Male
English French
Open.
Boy/Male
English French American
Open.
Boy/Male
Welsh
Son of Owen.
Boy/Male
English French
Open.
Boy/Male
Bengali, Indian
Loop; Autumn
Male
Welsh
 Modern Welsh form of Old Welsh Owain, OWEN means "born of yew." Compare with another form of Owen.
Boy/Male
English French
Open.
Male
Welsh
Variant form of Welsh Owen, possibly OUEN means "born of yew."
Female
Thai/Siamese
Thai name PEN-CHAN means "full moon."
Surname or Lastname
English (Somerset)
English (Somerset) : habitational name from Look in Puncknowle, Dorset, named in Old English with lūce ‘enclosure’.English : possibly a variant of Luck 3.Northern English and Scottish : from a vernacular pet form of Lucas.Dutch (van Look) : topographic name from look ‘enclosure’ or habitational name from a place named with this word.Thomas Look (b. c. 1622) was in Lynn, MA, by 1646. His son, also called Thomas (b. 1646), moved to Martha’s Vineyard about 1670.
Boy/Male
Celtic Welsh
Son of Owen.
Surname or Lastname
North German
North German : habitational name from any of several places called Loose or Loosey.North German : from a short form of Nikolaus, German form of Nicholas.Dutch : nickname from the adjective loos ‘cunning’, ‘artful’, ‘guileful’.English : variant spelling of Loose.
Male
Swedish
Norwegian and Swedish form of Old Norse Óðinn, ODEN means "poetry, song" and "eager, frenzied, raging."
Male
English
 Anglicized form of Irish Gaelic Eóghan, OWEN means "born of yew." Compare with another form of Owen.
Male
French
French form of Latin Lupus, LOUP means "wolf."
Surname or Lastname
English
English : metonymic occupational name for a cooper, from Middle English coupe ‘tub’, ‘container’ (see Cooper). In some cases the surname may have been derived from a pub or house sign.Dutch : from koop ‘purchase’, ‘bargain’, hence a nickname for a haggler or a metonymic occupational name for a merchant.
Girl/Female
Hindu
Look, Blessed with beauty, Shape, Beauty
Boy/Male
Hindu, Indian, Rajasthani, Sindhi, Traditional
Look; Beauty; Appearance
OPEN LOOP-CONTROLLER
OPEN LOOP-CONTROLLER
Girl/Female
Indian, Punjabi, Sikh
The Great Sound of Infinity
Boy/Male
Greek
Winner of Atalanta.
Girl/Female
Indian
Song for God
Girl/Female
Arabic, Hindu, Indian, Marathi, Muslim, Parsi, Portuguese, Telugu
Brilliant; The Fair One; Brilliant and Lovely; Fair
Boy/Male
Tamil
Simple of Joy, Prosperous
Girl/Female
Hindu
Payal, Anklet
Girl/Female
Indian, Tamil, Telugu
Cute Girl; Silent
Boy/Male
Hindu, Indian
White Dove
Boy/Male
Indian, Tamil
Honest Person
Girl/Female
Tamil
Answer of prayers, Goddess Lakshmi
OPEN LOOP-CONTROLLER
OPEN LOOP-CONTROLLER
OPEN LOOP-CONTROLLER
OPEN LOOP-CONTROLLER
OPEN LOOP-CONTROLLER
a.
Taking place in the open air; outdoor; as, an open-air game or meeting.
n.
Open or unobstructed space; clear land, without trees or obstructions; open ocean; open water.
n.
See Loon, the bird.
v. t.
To make a loop of or in; to fasten with a loop or loops; -- often with up; as, to loop a string; to loop up a curtain.
v. t.
To spread; to expand; as, to open the hand.
v. t.
To enter upon; to begin; as, to open a discussion; to open fire upon an enemy; to open trade, or correspondence; to open a case in court, or a meeting.
a.
Not drawn together, closed, or contracted; extended; expanded; as, an open hand; open arms; an open flower; an open prospect.
n.
A curve of any kind in the form of a loop.
a.
Not concealed or secret; not hidden or disguised; exposed to view or to knowledge; revealed; apparent; as, open schemes or plans; open shame or guilt.
a.
Free; disengaged; unappropriated; as, to keep a day open for any purpose; to be open for an engagement.
a.
Not of a quality to prevent communication, as by closing water ways, blocking roads, etc.; hence, not frosty or inclement; mild; -- used of the weather or the climate; as, an open season; an open winter.
a.
With eyes widely open; watchful; vigilant.
v. t.
To make or set open; to render free of access; to unclose; to unbar; to unlock; to remove any fastening or covering from; as, to open a door; to open a box; to open a room; to open a letter.
a.
Open.
a.
Produced by an open string; as, an open tone.
a.
Free or cleared of obstruction to progress or to view; accessible; as, an open tract; the open sea.
n.
See 1st Loop.
v. t.
To loosen or make less compact; as, to open matted cotton by separating the fibers.
a.
Not settled or adjusted; not decided or determined; not closed or withdrawn from consideration; as, an open account; an open question; to keep an offer or opportunity open.
v. t. & i.
To open.