State feedback integral control for a rotary direct drive servo valve using a Lyapunov function approach

Yu, Jian-Guang; Zhuang, Jian; Yu, Daren

doi:10.1016/j.isatra.2014.08.006

Cited by 18 publications

(12 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is often impossible to obtain an effective filtering effect by a single controller, and it is difficult to obtain a better accuracy effect. In addition, the diversified generation method under the actual working conditions determines that the single control algorithm is not ideal for eliminating the disturbance effect [8,[14][15][16][17][18]. Then the researchers proposed a number of integrated control algorithms to improve the accuracy of the system.…”

Section: Introductionmentioning

confidence: 99%

“…"Switching" as an idea was first introduced into 2 Complexity the control system from the switching servo system [10,[18][19][20][21]. It is determined by the switching rule to switch the subsystem, and only one subsystem can work at each moment [14][15][16][17][18][19][20]. On the one hand, the proposal and establishment of the switching system theory is adapting to the needs of the development of industrial production practice.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Undisturbed Switching Control Method of Superheated Steam Temperature Systems

2019

Complexity

View full text Add to dashboard Cite

In this paper, a new type of superheated steam temperature switching control system for thermal power plants is presented. A single neuron adaptive PSD (Proportional Sum Differential) predictive controller is designed. The DCS (Distributed Control System) control system platform is used for configuration design. At the same time, the feedforward compensation technology and anti-integration saturation technology are employed to improve the characteristics of large hysteresis and multi-interference in the superheated steam temperature system. Undisturbed switching performance can be well obtained between the new controller and its own PID controller. This proposed method has been well applied in a thermal power plant (600MW) and achieved better control quality.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Undisturbed Switching Control Method of Superheated Steam Temperature Systems

2019

Complexity

View full text Add to dashboard Cite

show abstract

“…Liu et al and Ruan et al proposed a special valve structure with two degree of freedom [7,8]. For purpose of optimizing the output waveform, a series of controller was designed by introducing Lyapunov function method, self-adjustment quantitative feedback theory, varying error controls strategy, neurodynamic optimization and other mathematical method [9][10][11][12][13][14][15][16]. For the sake of researching the vibration performance, Han et al simulated the vibration characteristics of a new electro-hydraulic vibrator by using the AMESim software [17].…”

Section: Introductionmentioning

confidence: 99%

Effect of sink flow on dual-valve electro-hydraulic excitation system

Meng¹,

Wu²,

Ni³

2016

J. vibroeng.

View full text Add to dashboard Cite

In this study, the main goal is to investigate the displacement gain characteristics of novel dual-valve Electro-Hydraulic Excitation system (EHES). Relative to conventional system, the dual-valve system can improve the amplitude range, but the range is always affected by some nonlinear factors. In order to analysis on the issue, a nonlinear mathematical model of dual-valve EHES is established based on Bernoulli and classical electro-hydraulic servo equation. Then, the results of numerical simulations by using of the MATLAB/Simulink software are compared with experimental results. Simulation and experimental results show that the sink flow mainly influences on the flow dynamic characteristics of dual-valve EHES. Because of that, dual-valve EHES only can improve 50 %-70 % of displacement within 5 to 50 Hz of excitation frequency and 45 %-80 % of displacement amplitude within 20 % to 100 % of command value.

show abstract

“…Despite the vast number of design studies all looking to minimise the flow forces and static pressure losses, the application of conceptually alternative construction of throttling elements and their arrangements are still rare in current literature. The use of valves with rotary spools to solve the problems associated with large flow forces that exist in high flow rate regimes has been studied (Yu et al, 2014), (Yu et al, 2015), (Yang et al, 2010), (Wang et al, 2016). Unlike conventional designs, a rotating spool configuration creates a much smaller net area of surfaces subjected to the flow forces.…”

mentioning

confidence: 99%

“…In the research of direct drive servo valves a single, axisymmetric spool works on a similar principle as a 4/3 directional valve. It modulates proportionally and simultaneously flow areas of both meter-in and meter-out hydraulic lines of an actuator (Yu et al, 2014), (Yu et al, 2015). Spool shoulders contain several axially oriented grooves overlapping with corresponding holes on the static bush.…”

mentioning

confidence: 99%

Evaluation of steady flow torques and pressure losses in a rotary flow control valve by means of computational fluid dynamics

Okhotnikov

Noroozi

Sewell

et al. 2017

International Journal of Heat and Fluid Flow

View full text Add to dashboard Cite

In this paper, a novel design of a rotary hydraulic flow control valve has been presented for high flow rate fluid power systems. High flow rates in these systems account for substantial flow forces acting on the throttling elements of the valves and cause the application of mechanically sophisticated multi-staged servo valves for flow regulation. The suggested design enables utilisation of single-stage valves in power hydraulics operating at high flow rates regimes. A spool driver and auxiliary mechanisms of the proposed valve design were discussed and selection criteria were suggested. Analytical expressions for metering characteristics as well as steady flow torques have been derived. Computational fluid dynamics (CFD) analysis of steady state flow regimes was conducted to evaluate the hydraulic behaviour of the proposed valve. This study represents a special case of an independent metering concept applied to the design of power hydraulic systems with direct proportional valve control operating at flow rates above 150 litres per minute. The result gained using parametric CFD simulations predicted the induced torque and the pressure drops due to a steady flow. Magnitudes of these values prove that by minimising the number of spool's mobile metering surfaces it is possible to reduce the flow-generated forces in the new generation of hydraulic valves proposed in this study. Calculation of the flow jet angles was analytically verified by measuring the deflection of the velocity vector using flow velocity field distribution, obtained during visualisation of the results of CFD simulations. The derived calculation formulas can predict metering characteristics, values of steady flow torques and jet angles for the specified design and geometry of the suggested valve. The proposed novel structure of the flow control valve promises to attain improved controllability, reliability and efficiency of the hydraulic control units of heavy mobile machinery operating at high flow rates regimes.

show abstract

State feedback integral control for a rotary direct drive servo valve using a Lyapunov function approach

Cited by 18 publications

References 18 publications

Undisturbed Switching Control Method of Superheated Steam Temperature Systems

Undisturbed Switching Control Method of Superheated Steam Temperature Systems

Effect of sink flow on dual-valve electro-hydraulic excitation system

Evaluation of steady flow torques and pressure losses in a rotary flow control valve by means of computational fluid dynamics

Contact Info

Product

Resources

About