Control devices

type of steering control in vehicles and vessels (ships and boats)

control loop mechanism used in control engineering based on three terms (P, I and D)

thumb|upright|Industrial servomotorThe grey/green cylinder is the brush (electric)|brush-type [[DC motor. The black section at the bottom contains the planetary reduction gear, and the black object on top of the motor is the optical rotary encoder for position feedback. This is the steering actuator of a large robot vehicle.]] thumb|Industrial servomotors and gearboxes, with standardised flange mountings for interchangeability

thumb|A typical kitchen timer

restriction used to measure flow or to control pressure or flow, sometimes given specialised names

device used aboard a water vessel to steer that vessel and control its course

mechanism for automatically controlling the speed of an engine

In mechanical and control engineering, a servomechanism (also called servo system, or simply servo) is a control system for the position and its time derivatives, such as velocity, of a mechanical system. It often includes a servomotor, and uses closed-loop control to reduce steady-state error and improve dynamic response. In closed-loop control, error-sensing negative feedback is used to correct the action of the mechanism. In displacement-controlled applications, it usually includes a built-in encoder or other position feedback mechanism to ensure the output is achieving the desired effect.

device used to regulate fluid flow

communications device used on a ship

thumb|Tiller blocked by two lines thumb|right|Stern compartment containing the tiller of Swedish warship Vasa (ship)|Vasa

flat area where control or monitoring instruments are displayed

target value that an automatic control system, for example PID controller, will aim to reach

heuristic method of tuning a PID controller developed by John G. Ziegler and Nathaniel B. Nichols

linear feedback control system

electrically operated valve that controls how hydraulic fluid is sent to an actuator

device that controls gas flow

A whipstaff is a steering device that was used on European sailing ships from the 14th to the 18th century. Its development preceded the invention of the more complex ship's wheel and followed the simple use of a tiller to control the steering of a ship underway.

type of power steering for ships

special electronic amplifier used to power electric servomechanisms based on feedback signals

electromechanical system for controlling events

rotating control mechanism