An improved nonlinear modelling and identification methodology of a servo-pneumatic actuating system with complex internal design for high-accuracy motion control applications

Rad, Ciprian-Radu; Hancu, Olimpiu

doi:10.1016/j.simpat.2017.03.008

Cited by 26 publications

(20 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Some research work on the pneumatic actuator is listed here. Nonlinearity, as a characteristic of a pneumatic actuator with respect to mass flow rate is reported in reference [31]. Here, modeling of the pneumatic actuator system through individual system parts modeling is illustrated.…”

Section: Referencesmentioning

confidence: 99%

A Soft Sensor for Estimation of In-Flow Rate in a Flow Process Using Pole Placement and Kalman Filter Methods

2019

View full text Add to dashboard Cite

This article reports the design of a soft sensor for estimation of in-flow to the control valve in a flow process. The objective of the proposed work is to design and compare the performance of pole placement and Kalman filter-based observers. The observer is designed to estimate the in-flow from the measured out-flow. A mathematical model is derived for the considered physical plant using the system identification technique. An observer is designed using Pole Placement and Kalman Filter methods from the derived plant model. The obtained observer is implemented on a real-life setup for estimation of the in-flow rate. Results obtained from the designed observers are then analyzed to select the better observer. Comparison of performance based on results from Kalman Filter and Pole Placement method of observers shows that the former is more accurate, whereas the computation time is smaller in the latter. Results achieved from the designed soft sensor are verified using an electromagnetic flowmeter, and the results have a root-mean-square percentage error of 0.79%.

show abstract

Section: Referencesmentioning

confidence: 99%

A Soft Sensor for Estimation of In-Flow Rate in a Flow Process Using Pole Placement and Kalman Filter Methods

2019

View full text Add to dashboard Cite

show abstract

“…However, the effective area of the proportional valve orifice has not been derived from the physical area. Rad et al [14] proposed an accurate mathematical model of a proportional directional control valve by considering the influence of dead-zone volume of proportional valve, and verified that using dead-zone volume can improve the accuracy of the model. However, the dead-zone characteristics are not obvious in a low-flow proportional valve, thus it is difficult to accurately characterize the mass flow equation of proportional valve.…”

Section: Introductionmentioning

confidence: 99%

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

Zhang

Wang

et al. 2019

Energies

View full text Add to dashboard Cite

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.

show abstract

“…Los cilindros neumáticos podrían ser una mejor alternativa ya que ofrecen una alta potencia de salida con un actuador de bajo peso; no generan calor en su operación y son adecuados para operar en ambientes limpios (Zhao et al (2017)), (Rad and Hancu (2017)).…”

Section: Introductionunclassified

“…Una línea de investigación se encarga de proponer modelos que incorporan los fenómenos no lineales y retardos en el sistema, así como proponer estrategias para estimar los parámetros involucrados en los modelos no lineales. Algunos ejemplos importantes son (Richer and Hurmuzlu (2000a)), (Blagojević and Stojiljković (2007)), (Hildebrandt et al (2010)) y (Rad and Hancu (2017)).…”

Section: Introductionunclassified

Control Robusto de un Actuador Neumático Basado en la Estructura de Control con Compensación Activa de Perturbaciones para Seguimiento de Trayectorias

Almeida¹,

Cárdenas²,

Díaz³

et al. 2019

Rev. iberoam. autom. inform. ind.

View full text Add to dashboard Cite

<p>Se propone una estrategia para resolver el problema de seguimiento de trayectorias en actuadores neumáticos inciertos y con medición parcial del vector de estado. La estrategia se basa en la estructura de control con compensación activa de perturbaciones (ADRC), que está formada por un observador de estado, un filtro pasa bajas y un controlador. En esta propuesta se utiliza un observador de estado discontinuo que estima el vector de estado completo y, utilizando el concepto del control equivalente, permite estimar los términos de perturbación presentes en la planta. El filtro pasa bajas se encarga de recuperar el control equivalente a partir de un término discontinuo del observador. Finalmente, el controlador tiene la estructura básica PD con un término adicional, que corresponde a las perturbaciones estimadas, y que tiene como fin compensar las perturbaciones reales en la planta. El rendimiento del sistema en lazo cerrado se evalúa mediante un índice de desempeño basado en la norma L2.</p>

show abstract

An improved nonlinear modelling and identification methodology of a servo-pneumatic actuating system with complex internal design for high-accuracy motion control applications

Cited by 26 publications

References 10 publications

A Soft Sensor for Estimation of In-Flow Rate in a Flow Process Using Pole Placement and Kalman Filter Methods

A Soft Sensor for Estimation of In-Flow Rate in a Flow Process Using Pole Placement and Kalman Filter Methods

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

Control Robusto de un Actuador Neumático Basado en la Estructura de Control con Compensación Activa de Perturbaciones para Seguimiento de Trayectorias

Contact Info

Product

Resources

About