A review on recent research trends in servo pneumatic positioning systems

Saravanakumar, D.; Mohan, B.; Muthuramalingam, T.

doi:10.1016/j.precisioneng.2017.01.014

Cited by 87 publications

(46 citation statements)

References 80 publications

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“…This mechanism uses pneumatic actuator equipped with suction cup to extend and retract the piston to and from the workpiece. D. Saravanakumar et al [7] come out with a dynamics motion of pneumatic cylinder. There are four forces that create the net force of the pneumatic actuator, which has been discuss by D. Saravanakumar The various of forces acting on the cylinder is shown in the Fig.…”

Section: Lifting Mechanismmentioning

confidence: 99%

Experimental Examination on t he Pneumatic Lifting Method of Deformable Object

Jaafar*,

Ayub

2019

IJEAT

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Industries such as agriculture and food have used polypropylene bag widely used as it is cheap and easy to find. Fertilizers industry especially needed to use the polypropylene bag that have high protection barrier against the high-level humidity especially we living in Malaysia that have high humidity in the air. By layering the polypropylene bag with another polypropylene bag, the moisture problem can be overcome. The polypropylene bag for fertilizers consists of 2 layers which is the woven polypropylene bag and the clear polypropylene bag. However, when assembling this two-polypropylene bag, worker needed to manually insert the clear polypropylene bag into the woven bag. This increases the time process in production, high labour force needed and also higher cost for mass production. Furthermore, repetitive works can cause strain to the worker and increases the number of errors. To overcome this issue, the automated polypropylene bag assembly system is proposed. For this paper, we only focus on the lifting method of the automated polypropylene bag assembly system. With the used of the automated polypropylene bag assembly system, the repetitive works and labour force can be reduced. This will also give out cleaner and consistent last product

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Section: Lifting Mechanismmentioning

confidence: 99%

Experimental Examination on t he Pneumatic Lifting Method of Deformable Object

Jaafar*,

Ayub

2019

IJEAT

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“…In recent years, with the development of microelectronic technology and the emergence of high-performance pneumatic components, pneumatic servo systems have been developed rapidly [5]. However, in some special cases, such as pneumatic manipulators for welding and feeding operations, gas floating vibration isolation optical platforms and medical assisted robots, precision control of pneumatic actuator is of particular importance [6].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Model Establishment and Experimental Verification of a Pneumatic Rotary Actuator Position Servo System

Zhang

Wang

et al. 2019

Energies

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In order to accurately reflect the characteristics and motion states of a pneumatic rotary actuator position servo system, an accurate non-linear model of the valve-controlled actuator system is proposed, and its parameter identification and experimental verification are carried out. Firstly, in the modeling of this system, the mass flow rate of the gas flowing through each port of the proportional directional control valve is derived by taking into account the clearance between the valve spool and the sleeve, the heat transfer formula is used to the derivation of the energy equation, and the Stribeck model is applied to the friction model of the pneumatic rotary actuator. Then, the flow coefficient, the heat transfer coefficient and the friction parameters are identified by the model and pneumatic test circuits. After the verification experiment of the mass flow rate equations, the charging and discharging experiment reveals that the model can clearly show the effect of clearances on gas pressure changes and describe the effect of heat transfer on gas temperature changes. Finally, the results of model verification indicate that the simulation curves of rotation angle and two-chamber pressures are consistent with their experimental values, and the non-linear model shows high accuracy.

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“…Therefore, a positioning error is not allowed in the drawing process of this mask, and high exposure precision is required for the positioning stage. In general, an electromagnetic actuator is adopted as an actuator of a precision positioning stage because of excellent linearity (Saravanakumar et al, 2017). However, in the case of this actuator, it is inevitable to generate heat and magnetism, which causes deterioration of the exposure precision of the EB.…”

Section: Introductionmentioning

confidence: 99%

Reinterpretation of PDD<sup>2</sup> compensator embedded in position control for pneumatic stage

Ishii

Manabe

Wakui

2019

JAMDSM

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PDD 2 (proportional + derivative + second derivative) compensator has been standardly used for position control of the pneumatic stage. This compensator is based on the integral characteristics of a pneumatic system composed of pipes, servo valves, and pneumatic cylinders. At this time, since the output of this compensator is integrated through the pneumatic system, PID control of the position is possible. However, the positioning of the pneumatic stage is slower than that of the electromagnetic actuators such as a linear and a ball screw stages. Generally, when either the controlled object or the compensator has a slow response, the response of the control system becomes slow. In the previous studies, the pneumatic stage itself, which is the controlled object, was focused on. Local feedback applied to the pneumatic and mechanical systems realized high-speed positioning. However, the influence on the positioning response using PDD 2 compensator, which forms the framework of the position control, has not been considered. Therefore, this note focuses on the structure of PDD 2 compensator. Here, the characteristics of this compensator are reinterpreted. Specifically, it is shown that a slow response cannot be avoided intrinsically due to the structure of this compensator. Furthermore, modified PDD 2 compensator with improved slow response is proposed.

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A review on recent research trends in servo pneumatic positioning systems

Cited by 87 publications

References 80 publications

Experimental Examination on t he Pneumatic Lifting Method of Deformable Object

Experimental Examination on t he Pneumatic Lifting Method of Deformable Object

Nonlinear Model Establishment and Experimental Verification of a Pneumatic Rotary Actuator Position Servo System

Reinterpretation of PDD<sup>2</sup> compensator embedded in position control for pneumatic stage

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