Use of control systems in day-to-day life

It is easy to raise heavy things with the help of the control system. Without control system, one will find it exceedingly difficult practically. Huge antennas can be pointed towards farthest points of the universe so that faintest radio signal can be picked. Control of these antennas with the use of the hand is almost impossible.

It is with the support of control systems; elevators can carry us at high speed to the desired destinations with automatic stopping at the correct floor. The power requirement for speed and load cannot be provided only by us only. It is the motors that support the power, the control systems monitor and regulate speed as well as position.

Reasons for developing control systems are:

• Power amplification
• Disturbances compensation
• Input Form convenience
• Power amplification

For example, The Radar Antenna needs a larger quantity of power or force to generate the output as rotation when sited by a low power rotary motion of a knob as its input. The required power gain or power amplification can be formed by the control system. These are beneficial so as to overcome the difficulties of a functioning human.

Control systems are beneficial in dangerous or remote locations like a remote controlled robotic arm to pick up the material is a better option in a radioactive environment. Control systems make the things convenient by varying the type of input. As in the case of temperature control system, the output heat is generated by the position on thermostat as input.

Normally, such variables are controlled as per the temperature in the thermal systems whereas in mechanical systems, velocity and position and in electrical systems as current, voltage and frequency in the electrical systems.

The system must provide the right output even in the situation wherein there is a disturbance of any kind. For example, take the system of antenna that points towards the commanded direction.

• The system should spot the disturbance and rectify the position of the antenna if the antenna is forced by the wind in contrast to the commanded direction or if any sort of noise comes internally.
• There is no change or variation in input, in case of rectification or correction.
• In the general case, the disturbance is measured by the system which has resulted in the repositioning of the antenna. Thereafter changes the direction of the antenna to a commanded position as per the input.