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Servomechanism

Index Servomechanism

In control engineering a servomechanism, sometimes shortened to servo, is an automatic device that uses error-sensing negative feedback to correct the action of a mechanism. [1]

64 relations: Aircraft, Amplidyne, Amplifier, Andrew Betts Brown, Anti-aircraft warfare, Autofocus, Bang–bang control, Constant-speed propeller, Control engineering, Control theory, Cruise control, Elisha Gray, Encoder, Feedback, Fire-control system, Fly-by-wire, Fractional-horsepower motor, Gain (electronics), Gas turbine, Gear, Governor (device), Hard disk drive, HathiTrust, HMS Champion (1915), Hydraulics, James Watt, John McFarlane Gray, Joseph Farcot, McGraw-Hill Education, MOSFET, Motion control, Navigation, Negative feedback, Numerical control, PID controller, Pneumatics, Potentiometer, Power window, Pulse-width modulation, Qian Xuesen, Radio-controlled model, Reversing gear, Robotics, Rotary encoder, Servo (radio control), Servo bandwidth, Servo control, Servomotor, SS Great Eastern, Steam engine, ..., Steering engine, Stepper motor, Synchro, Telautograph, Temperature coefficient, Thyristor, Transducer, Transistor, UNISERVO, UNIVAC I, Vacuum tube, Water wheel, Windmill fantail, World War II. Expand index (14 more) »

Aircraft

An aircraft is a machine that is able to fly by gaining support from the air.

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Amplidyne

An amplidyne is an electromechanical amplifier invented prior to World War II by Ernst Alexanderson.

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Amplifier

An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the power of a signal (a time-varying voltage or current).

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Andrew Betts Brown

Andrew Betts Brown MICE MINA (1841–1906) was a Scottish engineer and inventor.

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Anti-aircraft warfare

Anti-aircraft warfare or counter-air defence is defined by NATO as "all measures designed to nullify or reduce the effectiveness of hostile air action."AAP-6 They include ground-and air-based weapon systems, associated sensor systems, command and control arrangements and passive measures (e.g. barrage balloons).

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Autofocus

An autofocus (or AF) optical system uses a sensor, a control system and a motor to focus on an automatically or manually selected point or area.

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Bang–bang control

In control theory, a bang–bang controller (2 step or on–off controller), also known as a hysteresis controller, is a feedback controller that switches abruptly between two states.

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Constant-speed propeller

A constant-speed propeller is a variable-pitch aircraft propeller that automatically changes its blade pitch in order to maintain a chosen rotational speed.

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Control engineering

Control engineering or control systems engineering is an engineering discipline that applies automatic control theory to design systems with desired behaviors in control environments.

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Control theory

Control theory in control systems engineering deals with the control of continuously operating dynamical systems in engineered processes and machines.

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Cruise control

Cruise control (sometimes known as speed control or autocruise, or tempomat in some countries) is a system that automatically controls the speed of a motor vehicle.

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Elisha Gray

Elisha Gray (August 2, 1835 – January 21, 1901) was an American electrical engineer who co-founded the Western Electric Manufacturing Company.

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Encoder

An encoder is a device, circuit, transducer, software program, algorithm or person that converts information from one format or code to another, for the purposes of standardization, speed or compression.

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Feedback

Feedback occurs when outputs of a system are routed back as inputs as part of a chain of cause-and-effect that forms a circuit or loop.

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Fire-control system

A fire-control system is a number of components working together, usually a gun data computer, a director, and radar, which is designed to assist a weapon system in hitting its target.

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Fly-by-wire

Fly-by-wire (FBW) is a system that replaces the conventional manual flight controls of an aircraft with an electronic interface.

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Fractional-horsepower motor

A fractional-horsepower motor (FHP) is an electric motor with a rated output power of 746.9 or 746 Watts or less.

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Gain (electronics)

In electronics, gain is a measure of the ability of a two-port circuit (often an amplifier) to increase the power or amplitude of a signal from the input to the output port by adding energy converted from some power supply to the signal.

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Gas turbine

A gas turbine, also called a combustion turbine, is a type of continuous combustion, internal combustion engine.

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Gear

A gear or cogwheel is a rotating machine part having cut like teeth, or cogs, which mesh with another toothed part to transmit torque.

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Governor (device)

A governor, or speed limiter or controller, is a device used to measure and regulate the speed of a machine, such as an engine.

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Hard disk drive

A hard disk drive (HDD), hard disk, hard drive or fixed disk is an electromechanical data storage device that uses magnetic storage to store and retrieve digital information using one or more rigid rapidly rotating disks (platters) coated with magnetic material.

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HathiTrust

HathiTrust is a large-scale collaborative repository of digital content from research libraries including content digitized via the Google Books project and Internet Archive digitization initiatives, as well as content digitized locally by libraries.

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HMS Champion (1915)

HMS Champion was a light cruiser of the Royal Navy that saw service during World War I. She was part of the Calliope group of the C class.

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Hydraulics

Hydraulics (from Greek: Υδραυλική) is a technology and applied science using engineering, chemistry, and other sciences involving the mechanical properties and use of liquids.

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James Watt

James Watt (30 January 1736 (19 January 1736 OS) – 25 August 1819) was a Scottish inventor, mechanical engineer, and chemist who improved on Thomas Newcomen's 1712 Newcomen steam engine with his Watt steam engine in 1781, which was fundamental to the changes brought by the Industrial Revolution in both his native Great Britain and the rest of the world.

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John McFarlane Gray

John McFarlane Gray (or J. Macfarlane Gray; 7 April 1831 – 14 January 1908) was a Scottish engineer who invented a portable steam riveting machine and a steam steering mechanism for Isambard Kingdom Brunel's famous SS Great Eastern.

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Joseph Farcot

Jean Joseph Léon Farcot (23 June 1824 – 19 March 1908) was a French engineer and industrialist whose factories employed up to 700 workers.

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McGraw-Hill Education

McGraw-Hill Education (MHE) is a learning science company and one of the "big three" educational publishers that provides customized educational content, software, and services for pre-K through postgraduate education.

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MOSFET

MOSFET showing gate (G), body (B), source (S) and drain (D) terminals. The gate is separated from the body by an insulating layer (white). surface-mount packages. Operating as switches, each of these components can sustain a blocking voltage of 120nbspvolts in the ''off'' state, and can conduct a continuous current of 30 amperes in the ''on'' state, dissipating up to about 100 watts and controlling a load of over 2000 watts. A matchstick is pictured for scale. A cross-section through an nMOSFET when the gate voltage ''V''GS is below the threshold for making a conductive channel; there is little or no conduction between the terminals drain and source; the switch is off. When the gate is more positive, it attracts electrons, inducing an ''n''-type conductive channel in the substrate below the oxide, which allows electrons to flow between the ''n''-doped terminals; the switch is on. Simulation result for formation of inversion channel (electron density) and attainment of threshold voltage (IV) in a nanowire MOSFET. Note that the threshold voltage for this device lies around 0.45 V The metal-oxide-semiconductor field-effect transistor (MOSFET, MOS-FET, or MOS FET) is a type of field-effect transistor (FET), most commonly fabricated by the controlled oxidation of silicon.

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Motion control

Motion control is a sub-field of automation, encompassing the systems or sub-systems involved in moving parts of machines in a controlled manner.

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Navigation

Navigation is a field of study that focuses on the process of monitoring and controlling the movement of a craft or vehicle from one place to another.

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Negative feedback

Negative feedback (or balancing feedback) occurs when some function of the output of a system, process, or mechanism is fed back in a manner that tends to reduce the fluctuations in the output, whether caused by changes in the input or by other disturbances.

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Numerical control

Computer numerical control (CNC) is the automation of machine tools by means of computers executing pre-programmed sequences of machine control commands.

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PID controller

A proportional–integral–derivative controller (PID controller or three term controller) is a control loop feedback mechanism widely used in industrial control systems and a variety of other applications requiring continuously modulated control.

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Pneumatics

Pneumatics (From Greek: πνεύμα) is a branch of engineering that makes use of gas or pressurized air.

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Potentiometer

A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider.

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Power window

Power windows or electric windows are automobile windows which can be raised and lowered by pressing a button or switch, as opposed to using a crank handle.

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Pulse-width modulation

Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique used to encode a message into a pulsing signal.

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Qian Xuesen

Qian Xuesen, or Hsue-Shen Tsien (11 December 1911 – 31 October 2009), was a prominent Chinese aerodynamicist and cyberneticist who contributed to rocket science and established engineering cybernetics.

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Radio-controlled model

A radio-controlled model (or RC model) is a model that is steerable with the use of radio control.

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Reversing gear

On a steam locomotive, the reversing gear is used to control the direction of travel of the locomotive.

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Robotics

Robotics is an interdisciplinary branch of engineering and science that includes mechanical engineering, electronics engineering, computer science, and others.

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Rotary encoder

A rotary encoder, also called a shaft encoder, is an electro-mechanical device that converts the angular position or motion of a shaft or axle to analog or digital output signals.

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Servo (radio control)

Servos (also RC servos) are small, cheap, mass-produced servomotors or other actuators used for radio control and small-scale robotics.

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Servo bandwidth

Servo bandwidth can be defined as the maximum trackable sinusoidal frequency of amplitude A, with tracking achieved at or before 10% of A amplitude is reached.

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Servo control

Servo control is achieved by sending a servo a PWM (pulse-width modulation) signal, a series of repeating pulses of variable width where either the width of the pulse (most common modern hobby servos) or the duty cycle of a pulse train (less common today) determines the position to be achieved by the servo.

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Servomotor

A servomotor is a rotary actuator or linear actuator that allows for precise control of angular or linear position, velocity and acceleration.

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SS Great Eastern

SS Great Eastern was an iron sailing steamship designed by Isambard Kingdom Brunel, and built by J. Scott Russell & Co.

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Steam engine

A steam engine is a heat engine that performs mechanical work using steam as its working fluid.

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Steering engine

A steering engine is a power steering device for ships.

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Stepper motor

A stepper motor or step motor or stepping motor is a brushless DC electric motor that divides a full rotation into a number of equal steps.

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Synchro

A synchro (also known as Selsyn and by other brand names) is, in effect, a transformer whose primary-to-secondary coupling may be varied by physically changing the relative orientation of the two windings.

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Telautograph

The telautograph, an analog precursor to the modern fax machine, transmits electrical impulses recorded by potentiometers at the sending station to servomechanisms attached to a pen at the receiving station, thus reproducing at the receiving station a drawing or signature made by the sender.

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Temperature coefficient

A temperature coefficient describes the relative change of a physical property that is associated with a given change in temperature.

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Thyristor

A thyristor is a solid-state semiconductor device with four layers of alternating P- and N-type materials.

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Transducer

A transducer is a device that converts energy from one form to another.

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Transistor

A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power.

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UNISERVO

The UNISERVO tape drive was the primary I/O device on the UNIVAC I computer.

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UNIVAC I

The UNIVAC I (UNIVersal Automatic Computer I) was the first commercial computer produced in the United States.

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Vacuum tube

In electronics, a vacuum tube, an electron tube, or just a tube (North America), or valve (Britain and some other regions) is a device that controls electric current between electrodes in an evacuated container.

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Water wheel

A water wheel is a machine for converting the energy of flowing or falling water into useful forms of power, often in a watermill.

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Windmill fantail

A fantail is a small windmill mounted at right angles to the sails, at the rear of the windmill, and which turns the cap automatically to bring it into the wind.

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World War II

World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although conflicts reflecting the ideological clash between what would become the Allied and Axis blocs began earlier.

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Error signal, RC Servo, RC servo, Rc servos, Servo Motor, Servo system, Servo-mechanism, Servos, Telemotor.

References

[1] https://en.wikipedia.org/wiki/Servomechanism

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