Friday, February 28, 2020

Electro-Mechanical Control Systems Assignment Example | Topics and Well Written Essays - 1250 words

Electro-Mechanical Control Systems - Assignment Example Top-down approach in problem solving is used to solve the problems in different stages and sections. Thus, it is rather easier to solve the smaller problems rather than solving a big problem. It is rapid process of solving the problems. Rather than decreasing the viability of the solution, it enhances the reusability of the solutions and provides solution for various other problems regarding the problems or encircling the major given or discussed problem. Makes larger problems into smaller parts that can easily be solved and remain more manageable. Makes it easier to evaluate the sources of problem and correct the problem from source. In general, top-down approach splits the problems in smaller sections and parts that make the problems easier to solve and more manageable in every manner. The quality of the results remains much better as compared to that presented by other problem solving approaches. At the end, the individual results are combined to solve the problem on a scale (Math ieu, 2002). Ball Screw is a liner actuator that converts rotational motion of a moor or a rotating shaft into linear displacement. It presents very little resistance due to the ball bearing mechanism for the linear displacement of the screw. The assemble with the ball bearings act as the nut of the device while the rotating shaft or the threaded shaft acts as the screw of the device. When the nut assembly moves with respect to the rotating shaft, the balls move inside the nut assembly. There is no direct physical contact between the nut and screw. Ball bearings support and hold both the nut and screw assembled together. The whole mechanism makes the Ball screw to present lowest tolerance and highly precision at every stage. The shaft of the ball screw or the rotating shaft holds the ball bearings and presents helical raceway for the ball bearings. In this manner, the ball screws are able to with stand heavy loads

Wednesday, February 12, 2020

Fighter Jets Speech or Presentation Example | Topics and Well Written Essays - 1250 words

Fighter Jets - Speech or Presentation Example The role of the air force could be divided into the following tasks: interdiction, close support, bombing, reconnaissance and air superiority. Interdiction is the task in which the air force intercepts an aerial target as it is moving towards its destined objective. Close support means the air force will provide lead aerial fire support against opposing ground or sea targets. Reconnaissance is the observation and gathering of enemy presence and movement from a safe distance. Air superiority is the task of securing the airspace of a battle-zone to ensure control of aerial advantages. In the case of air superiority, victory lies in the side that have the better skills and an even a near equal measure of equipment. The only way of getting rid of opposing air superiority is by either having the better pilots and planes, or by having the ground forces have a superior anti-air defense system and weaponry. Fighter jets could make use of either auto-cannons or different kinds of missiles to destroy aerial targets. Auto-cannons are used when aerial combat has become a close ranged dogfight. Missiles are used differently, depending on its kind and size. Some missiles are heat-seeking types which home into any heat signature found in the radar sight. Radar-guided missiles are missiles that are guided to a target based on the direction the radar bore-sight is aimed on. In combat, pilots of fighter jets would either have to maneuver their way from getting shot down, or make use of different countermeasures like flares, chaff or jamming systems, to avert any enemy weapons from hitting them. It should be remembered that the introduction of jet aircrafts, despite being a scientific and engineering endeavor, is a co-related to the arms race of military powers in gaining advantages of air power and superiority. During the First World War, the concept of air warfare was born and put into its early stages of application. While most critics in the military circles that time express ed that aircrafts in warfare will just be relegated to a purely reconnaissance role, a handful of visionary and forward thinking military officers and theorists saw the great potential of aircraft in more combative roles in future wars to come. The latter among the two sides were very much correct. Come the Second World War, the world’s powerful military nations already developed a formal and fundamental doctrine for their air forces. It became apparent to military leaders in the world’s leading nations that control of the air would limit the role of enemy ground and maritime forces since aircrafts literally have the sky as the limits unlike the armies and navies. Germany and Russia developed their air force doctrine to play a close combat support in tandem with their ground forces with respect to combined arms tactics and strategy. The British pursued a more active air superiority and defense role for its aircraft, while developing long range strategic bombing strateg ies with the Americans later on. The Americans and Japanese developed the basis for naval aviation as they produced aircrafts designed to operate on naval aircraft carriers. As the war dragged on, Germany’s air force also developed into air superiority roles as they switched into a more defensive strategy. As the war prolonged during the Second World War, the nations at war would pour a great deal of effort in trying to get the advantage over their adversary by