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Actuator replacement period may vary in different conditions and the change rate for the pneumatic actuators volume might be influenced by the piston velocity. In this manner, if we are calculating the pneumatic actuators derivative term in the right hand side, we can solve the problem by using the equation to obtain the dynamic model of the pneumatic actuators friction. The pneumatic actuators model is largely based on the micro deformation of a number of asperities in the surface contact. It is possible to perceive an evolution in the pneumatic actuators friction models that are based on the deformations and depicted in the data bases. Some kind of pneumatic actuators model describes friction in the sliding movement phase, in a similar way to the rigid spring that is marked with a certain type of damping behavior. However, this kind of pneumatic actuators has not included the frication model that is proposed in recent years. The pneumatic actuators model includes describes many complex friction behaviors but is limited in the movement phase, according to simulations results as well as the experimental tests. At the same time, a number of other pneumatic actuators models have been proposed in terms of the improvements in working efficiency through the inclusion of a model with local memory as well as sliding force transition curves. The actuator replacement period might be predicted as long as the operators are experienced enough in this task.
This improved pneumatic actuators model is widely used in the pneumatic positioning system as an experimental, theoretical model. Even so, a numerical study of concentrated pneumatic actuators vortex flow as well as the features of a hydraulic check valve should be recognized in the phenomenon of the pneumatic actuators rotation. The pneumatic actuators ball around the axis of the device can be checked or even replaced through which liquid flows has been found. That is, pneumatic actuators vibration might be caused by the rotation of the ball in the check valve, according to what we observe in the rotation of the pneumatic actuators ball around the longitudinal axis of the valve. This type of rotation is largely induced by vortex that is sledded from the ball in both the simulation and experimental investigations of the strong pneumatic actuators rotation. The frequency of the vibration and interaction with the check valve wall has been measured as a function in a wide range of studies concerning the electric actuators. The validity of the simulation and of the assumptions on the pneumatic actuators is largely based on the possibility of controlling the vibrations in a hydraulic system, which proves to be a very effective suppression of the self excited movement process.