Study on Performance of Laminated Piezoelectric Pneumatic Servo Valve

Study on the Performance and Control of a Piezo-Actuated Nozzle-Flapper Valve with an Isothermal Chamber

“…Therefore, it can be employed as a pilot stage for much bigger pneumatic valves. Fast response without any notable delay is a result of the utilization of piezoelectric actuator to actuate the valve, as was predicted in [2] and [3]. In this case, the maximum error between the simulation result and experimental data is only about 2 %.…”

“…In [2] a pneumatic positioner with a piezoelectric actuator was modeled, and its advantages were introduced. A pneumatic servo valve driven by a piezoelectric actuator with a simple amplification mechanism was presented in [3]. In contrast, some other research works have attempted to attain a reasonable and detailed mathematical model of the valve to optimize the control effort of the pneumatic system.…”

“…However, this has shortcoming such as large dimensions, high electrical power consumption, slow response and susceptible to electromagnetic interference [3]. The most effective actuator that can overcome these limitations is a piezoelectric actuator.…”

“…Piezoelectric actuators have much less electrical energy consumption along with much faster response time; also, the mechanism is spark-and magneticfield free. These unique properties have made it much more applicable to be used as an actuator in pneumatic valves [1] to [3]. Furthermore, the stacked type of piezoelectric actuator simplifies the mathematical model of the valve due to its sturdy construction [5].…”

Optimization of orifice position in particle-excitation valve for proportional flow control

“…Many kinds of pneumatic control devices have been researched [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. Especially, piezoelectric (PZT) actuators are widely used [14][15][16][17][18][19][20][21][22][24][25][26][27][28] because some of these actuators have high response and large power. Because the strokes of PZT actuators are very small and must be increased, some researches use laminated PZTs [17][18][19], bimorph structure [16], motors [20,21,24], or displacement amplifier mechanisms [25][26][27][28].…”