Manual and Automatic
Manual control is done by human control that acts as operator, while control is automatically performed by the control of machines / equipment that works automatically and operation under the supervision of a human. Examples of control manually are found in everyday life such as the regulation of radio, television, light settings screen, setting the water flow through the faucet and others, while the automatic control were encountered in industrial processes, control of aircraft, power generation and etc.
Open networks and network Closed
The control system is a closed network control system in which the amount of output give effect to the input quantities are controlled so that the amount can be compared to the price desired by recording devices. Furthermore, the price differences that occur between the amount of controlled and appointment recording device is used as a correction in turn be the target of control.
Control system with an open network control system in which the output is tidakmemberikan effect on the amount of the controlled variable input so tidakdapat compared against the desired price. Applications open and closed network systems encountered in everyday life as follows: if a person driving a car, the track speed along the acceleration of the vehicle can be determined and controlled by the rider dengancara observe the traffic conditions and control the steering, brakes and other instruments of control.
If the driver wants to maintain the speed at a constant price (as output) then the driver can set it through the acceleration pedal (gas) and the price is right this can be obtained by observing penunjukkanspedometer. By watched the magnitude of the output of any given moment will be given a means to input information (in this case the rider and pedalgas) so that in case of deviation from the speed, the rider dapatmengendalikannya back to the supposed price.
The example is contohsistem control with a closed network and it will turn into a control system with an open network if the vehicle is not equipped with a speedometer.
Continuous (analog) and discontinuous (discrete)
To control the type of continuous control system (analog) can be divided into several parts:
o Proportional. At this proportional control where the output is proportional to the deviation. For example through a steam control valve, control pressure transmitters and others
o Integral. At this integral control where the output change-ubahselama always occur deviations and speed changes of the output is proportional to the deviation. Examples controlling liquid level in the tank, control pressure system and others
o Differential. Integral control is rarely used by itself, but combined with a kind of proportional to eliminate doubts if this kind of proportional require stable characteristics.
For the control system controls the type of discontinuous (discrete) can be divided menjadibeberapa parts:
o Control of the two positions. For example relays, thermostats, level, switch OnOff and others.
o Control with multiple positions. Examples selector switch (selector switch). The advantage tends to reduce oscillations
o Control of Floating. Relative position is not limited, in this type of energy transfer can be done through one of the few possibilities.