Question

Can you write essay with 300-450 words related to these keywords?

1-Drag force 2- Lift force 3- Omnidirectional 4- Pitch control 5- Stall control 6- Yaw motor

Answer 1

Drag Force :

A drag force is the resistance force caused by the motion of a body through a fluid, such as water or air. A drag force acts opposite to the direction of the oncoming flow velocity. This is the relative velocity between the body and the fluid.

In fluid dynamics, drag (sometimes called air resistance, a type of friction, or fluid resistance, another type of friction or fluid friction) is a force acting opposite to the relative motion of any object moving with respect to a surrounding fluid. This can exist between two fluid layers or surfaces or a fluid and a solid surface. Drag forces always decrease fluid velocity relative to the solid object in the fluid's path.

Lift Force :

A fluid flowing around the surface of an object exerts a force on it. Lift is the component of this force that is perpendicular to the oncoming flow direction.It contrasts with the drag force, which is the component of the force parallel to the flow direction. Lift conventionally acts in an upward direction in order to counter the force of gravity, but it can act in any direction at right angles to the flow.

If the surrounding fluid is air, the force is called an aerodynamic force. In water or any other liquid, it is called a hydrodynamic force.

Omnidirectional :

Omnidirectional refers to the notion of existing in every direction. Omnidirectional devices include:

• Omnidirectional antenna, an antenna that radiates equally in all directions.
• VHF omnidirectional range, a type of radio navigation system for aircraft.
• Omnidirectional camera, a camera that can see all 360 degrees around it.
• Omnidirectional treadmill, a treadmill that allows a person to walk in any direction without moving.
• Omnidirectional microphone, a microphone that can hear from all directions.
• Mecanum wheel, a specially designed wheel that allows movement in any direction, such as that used by many robots.
• Wingless Electromagnetic Air Vehicle, an electrically operated vehicle that can fly in any direction.

Pitch Control :

A pitch control is a control on an audio device such as a turntable, tape recorder, or CD player that allows the operator to deviate from a standard speed. Analog pitch controls vary the voltage being used by the playback device; digital controls use digital signal processing to change the playback speed or pitch.

Turntable or CD playing speed may be changed for beat matching and other DJ techniques, while pitch shift using a pitch control has myriad uses in sound recording.

Stall Control :

Stall control takes advantage of reduced aerodynamic lift at high angles of attack to reduce torque at high wind speeds. Blades in stall-controlled machine are fastened rigidly to the rest of the hub, resulting in a simple connection.

Yaw Motor :

The yaw motor is an important component of the horizontal axis wind turbines. To ensure the wind turbine is producing the maximal amount of electric energy at all times, the yaw motor is used to keep the rotor facing into the wind as the wind direction changes. This only applies for wind turbines with a horizontal axis rotor. The wind turbine is said to have a yaw error if the rotor is not aligned to the wind. A yaw error implies that a lower share of the energy in the wind will be running through the rotor area.