Simulation, animation and program support for a high performance pneumatic force actuator system

Dihovicni, Djordje; Nedić, Novak

doi:10.1016/j.mcm.2007.11.013

Cited by 21 publications

(14 citation statements)

References 7 publications

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“…The dynamic mathematical model of the piston prover in this paper is based on lumped-element models, which can be found, for instance, being applied in studies of the dynamics of pneumatic cylinders [9,10] and free-piston Stirling engines [11,12]. The main modelling assumptions are as follows.…”

Section: Dynamic Mathematical Model Of the Piston Provermentioning

confidence: 99%

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Dynamic effects in a clearance-sealed piston prover for gas flow measurements

Kutin

Bobovnik²,

Bajsić³

2011

Metrologia

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A piston prover determines the gas flow rate by measuring the time interval that a movable piston inside a cylinder needs to pass a known volume of gas at a defined pressure and temperature. This paper deals with the dynamic effects related to the operation of a high-speed, clearance-sealed realization of the piston prover concept. Its dynamic characteristics are analysed by means of pressure-response measurements and lumped-element mathematical modelling. The experimental results show that the pressure oscillations during the timing cycle increase significantly above a certain flow rate and have multiple frequency components. They could be related to the resonance effects of the piston oscillator, which is excited by the flow instabilities of the gas flowing in the cylinder below the piston. The simulations show that the sensitivity to the dynamic pressure effects depends on the properties of the thermodynamic gas processes being adiabatic, polytropic or isothermal. A new, modified flow equation of the piston prover, which considers the polytropic index as an input variable, is proposed.

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Section: Dynamic Mathematical Model Of the Piston Provermentioning

confidence: 99%

“…(i) flow equation without dynamic correction (10), which simulates the case when the slow-response pressure sensor measures only the steady-state pressure (p 1 = p 2 = P ):…”

Section: Correction Of Dynamic Effects Due To Pressure Variationsmentioning

confidence: 99%

Dynamic effects in a clearance-sealed piston prover for gas flow measurements

Kutin

Bobovnik²,

Bajsić³

2011

Metrologia

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“…More details about modelling and simulation of actuator systems can be found in the literature. 10–12…”

Section: Introductionmentioning

confidence: 99%

A nature inspired optimal control of pneumatic-driven parallel robot platform

Pršić

Nedić

Stojanović

2016

Proceedings of the Institution of Mechanical Engineers, Part C:

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Woodworking industry is increasingly characterized by processing complex spatial forms with high accuracy and high speeds. The use of parallel robot platforms with six degrees of freedom gains more significance. Due to stricter requirements regarding energy consumption, easy maintenance and environmental safety, parallel platforms with pneumatic drives become more and more interesting. However, the high precision tracking control of such systems represents a serious challenge for designers. The reason is found in complex dynamics of the mechanical system and strong nonlinearity of the pneumatic system. This paper presents an optimal control design for a pneumatically driven parallel robot platform. The Proportional-Integral-Derivative (PID) algorithm with feedback linearization is used for control. The parameter search method is based on a firefly algorithm due to the empirical evidence of its superiority in solving various nonconvex problems. The simulation results show that the proposed optimal tuned cascade control is effective and efficient. These results clearly demonstrate that the proposed control techniques exhibit significant performance improvement over classical and widely used control techniques.

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“…Without a proper model, accurate nonlinear analysis of hydraulic system performance is not possible. Modeling and simulation of the actuator systems can be seen in [6,7]. A number of nonlinear control strategies have been developed in the last decade [8,9].…”

Section: Introductionmentioning

confidence: 99%

Optimal control of hydraulically driven parallel robot platform based on firefly algorithm

2015

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A new cascade load force control design for a parallel robot platform is proposed. A parameter search for a proposed cascade controller is difficult because there is no methodology to set the parameters and the search space is broad. A parameter search based on firefly algorithm (FA) is suggested to effectively search the parameters of the cascade controller. We used unified mathematical model of hydraulic actuator of parallel robot platform. These equations are readily applicable to various types of proportional valves, and they unify the cases of critical center, overlapped and underlapped valves. These unified model equations are useful for nonlinear controller design. The optimal results are compared to those obtained from other metaheuristic algorithms: GA, PSO and CS. A comparative study is also made between proposed optimal tuned cascade control using FA and well-tuned PID controller. Simulation results show the advantages of the proposed optimal tuned cascade controller using FA to solve a formulated tracking problem.

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Simulation, animation and program support for a high performance pneumatic force actuator system

Cited by 21 publications

References 7 publications

Dynamic effects in a clearance-sealed piston prover for gas flow measurements

Dynamic effects in a clearance-sealed piston prover for gas flow measurements

A nature inspired optimal control of pneumatic-driven parallel robot platform

Optimal control of hydraulically driven parallel robot platform based on firefly algorithm

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