Most robotic industries depend on using (servo motors) and (stepper
motors) orcontinuous current motors (DC motors) for movement
transition, which increases the cost and complicates the robot’s
controlling process, as well as its driving circuits.
This essay deals with using pneumatic in the new design and
building of a robot’s arm, that can manage to do many tasks with a
much lower budget than the one needed for any of the above
mentioned methods, that’s because it can be used for tasks that need
high speed and capacity, but don’t need precision.
During the study of liquid filling systems’ performance using a
piston driven by a pneumatic piston, all parameters having an
influence should be considered. One of these parameters is the
piston pressure and its influence on the velocity of the p
iston. This
influence will be explained in this paper.
In liquid filling systems using a cylinder with a reciprocating piston driven by
pneumatic cylinder,
In the filling stroke there are a lot of parameters affecting these systems and their
performances ,one of these parameters is a piston stroke len
gth.
In this paper the influences of a piston stroke length and their parameters on the
velocity of the piston has been studied in order to reach the optimum piston stroke length.
First the mathematical module of velocity of the piston and the length of the stroke
and other parameters is extracted, then experiments are done using a special testing stand
equipped by all control and measuring tools.
All reading data are converted into graphs.
The results show that In liquid filling systems there is an ideal value range for the
piston stroke length.
The aim of this paper is to investigate the overlap between lower atmospheric boundary layer and real wind turbine wake which installed not far from ground surface, Here we adopted rotating actuator-disk model (RADM) as a complex model of 3D actuator
-disk model, virtual blade modeling (VBM) and tip loss correction, in order to get more reliability and satisfied result.
Wind turbines have grown significantly in size over the last years and, it generally placed in an atmospheric boundary layer, then the assumption of uniform wind velocity cannot be valid.
The lower part of atmospheric boundary layer has a high level of turbulence intensity and great velocity gradients, then when wind turbine placed in these conditions, a high rate of fluctuation will occur subsequently power losses in wind farms, and change wake turbulence character which affects the flow-induced dynamic loads on downwind turbines.
A study of the effect of electrostatic charge that is generated in actuator due to drying methods on the delivered dose of metered dose inhaler has been done in tow cases:
Washing actuator and drying it by a clothe.
Washing actuator and let it dry
alone.
A study has been done on metered dose inhaler containing salbutmaol sulfate and manufactured by a local company.
The results show the importance of drying methods on the delivered dose, the delivered doses of metered dose inhaler after washing the actuator and dry it by a clothe hadn't been achieved the USP-34 requirements (out of range 75-125%), while the delivered doses after washing actuator and let it dry alone had been achieved the USP-34 requirements.
The difference in results between the two cases belong to electrostatic charge generated in actuator due to drying methods
