Pneumatic Actuators

"Hola a continuación pongo a su disposición un pequeño resumen acerca de un articulo en ingles de Actuadores Neumáticos. Este articulo fue expuesto y redactado en el curso de Ing. Eléctrica"

Any engineer that has already tempted to realize servo control with a pneumatic and dynamic control of an air machine. Air cylinders have given people who design machines a fast and convenient way of discrete actuation. It is said that the function of these actuators have been very poor. There is a deficiency in these actuators in which this deficiency is called compressibility. An example that they say is a cylinder with a 2 inch bore and 12 inch stroke that is coupled to a 100 pound inertial load. When the cylinder is filled with a force of over 210,000 pounds it is necessary for an actuator to have a change from 1 inch away. Magnetic fields are always independent of their positions and they are also compressible. They believe that in modern fluid power engineers try to control a pneumatic servo their attempt on doing that will be unsuccessful. A pneumatic servo actuator is capable of moving from the center to an open aperture in about 3 milliseconds or less. It also has a head of where the processor is and it is capable of multitasking. The DSP proved a speed necessary to implement complex and non linear algorithms. Bugbear of motion control is compressibility. The limits that a closed loop system depends on are numerous factors. The final speed of the actuator depends a lot on the movement that it does, The fastest velocity has its limit and is limited by the type of seal material and not the dynamic controllability. If high speed in required than it should be delivered otherwise the velocity should stay below a certain amount. The dynamic tracking lets the actuator maintain a certain acceleration and velocity and not go beyond the speed it suppose to. Inertia ratio changes in load and if correctly loaded it will perform well over a range of movement loads . If it is reached at maximum speed it will make the loads way smaller. Disturbance rejection is when the servo can always reject the disturbances with the loads. If set to the highest speed this rejection will be disrupted and will not work for a while. Random pressure brought from anywhere will not affect the pneumatic servo. As years have been passing newer and newer sensors have become available that releases the price point of position sensing.