Position control of a pneumatic cylinder actuator using modified PWM algorithm | ||||
| Journal of Engineering Science and Military Technologies | ||||
| Article 2, Volume 4, Issue 1, March 2020, Page 121-126 PDF (1.27 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejmtc.2020.31861.1145 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Moataz Youssry1; Wael M. Elmayyah2; Mohamed Hussien Mabrouk  2
| ||||
| 1Egyptian armed forces | ||||
| 2Military Technical College | ||||
| Abstract | ||||
| Pneumatic cylinders are used as actuators for modern automated systems in many industries applications for their numerous advantages. Basically, those applications are implemented using components such as proportional and servo pneumatic control valves that are relatively expensive because of their high accuracy even in applications that do not require such high accuracy. Recently, binary (on/off) solenoid directional control valves (DCVs) have been used to replace many of the expensive components and consequently reduce the system cost with achieving acceptable accuracy. This paper presents a control technique for a positioning system of a pneumatic double acting cylinder controlled by pair of on/off solenoid DCVs. The control technique has been developed based on a parametric study presented previously by the authors[1]. The control technique depends on operating the DCVs using a pulse width modulation (PWM) algorithm that is modified to employ a valve dead-zone compensator (DZC) along with using optimum pneumatic parameters gained from the performed parametric study. An experimental test bed for a pneumatic double acting cylinder positioning system that uses a pair of on/off solenoid DCVs has been installed to test the accuracy of the presented control technique. A comparison between the performance of the positioning control technique using the modified PWM control algorithm and the traditional one has been carried out to experimentally show the enhancement of the positioning accuracy with acceptable maximum steady state error less than 0.7 mm when using the modified PWM control technique due to reducing the system nonlinearity associated with its dynamics. | ||||
| Keywords | ||||
| Dead-zone compensator; non-linearity; pneumatic double acting cylinder; solenoid DCV | ||||
|
Statistics Article View: 226 PDF Download: 592 |
||||
