Optimization of Electromagnetic Actuator Performance for High-Speed Valves

1986 ◽  
Vol 108 (3) ◽  
pp. 351-357
Author(s):  
J. P. Karidis ◽  
S. R. Turns
Keyword(s):  
Response Time ◽  
High Speed ◽  
Fuel Injection ◽  
Dynamic Performance ◽  
Optimization Technique ◽  
Control Valve ◽  
Design Parameters ◽  
Electromagnetic Actuators ◽  
Lumped Parameter ◽  
Injection Control

The dynamic performance of electromagnetic actuators driving on-off control valves is optimized numerically by combining hybrid lumped-parameter/distributed-parameter actuator models with an efficient constrained optimization technique. Two examples of constrained actuator optimization are presented where up to eight design parameters are optimized. One example problem involves minimizing variations in the response time of a fuel injection control valve caused by manufacturing and assembly tolerances, while the other example deals with minimizing the response time of a high-speed gas sampling valve.

Development of High-Speed Response Electromagnetic Linear Actuator Using for Pneumatic Control Valve

2014 ◽  
Vol 532 ◽  
pp. 41-45 ◽  
Author(s):  
Myung Jin Chung
Keyword(s):  
Optimal Design ◽  
Dynamic Characteristics ◽  
High Speed ◽  
Design Method ◽  
Control Valve ◽  
Design Parameters ◽  
Linear Actuator ◽  
Analytic Model ◽  
Electromagnetic Linear Actuator ◽  
Quadratic Programming Method

Analytic model of electromagnetic linear actuator in the function of electric and geometric parameters is proposed and the effects of the design parameters on the dynamic characteristics are analyzed. To improve the dynamic characteristics, optimal design is conducted by applying sequential quadratic programming method to the analytic model. This optimal design method aims to minimize the response time and maximize force efficiency. By this procedure, electromagnetic linear actuator having high-speed characteristics is developed.

scholarly journals DIESEL INJECTOR PUMP WITH RING CONTROL VALVE

2020 ◽  
pp. 68-76
Author(s):  
Fanil' Gabdrafikov ◽  
Irshat Aysuvakov ◽  
Ilgiz Galiev
Keyword(s):  
Fuel Injection ◽  
Ring Width ◽  
Control Valve ◽  
Free Edge ◽  
Original Position ◽  
Design Parameters ◽  
Elastic Ring ◽  
Hydraulic Actuator ◽  
Wide Range ◽  
Ring Valve

The studies were carried out with the aim of modernizing the pump injector with a hydraulic actuator of the HEUI system plunger with the development of a control valve model based on a split elastic ring that provides fast fuel injection control. The upgraded device differs from the existing ones in that instead of a control freely floating valve (ball) or a poppet valve with springs, a valve in the form of a split elastic ring is installed in the valve assembly. One end of this ring is fixed rigidly, the other is freely movable to block the drain channel of the liquid. The canal overlaps the free edge of the ring when the electromagnet is turned on (installed with a gap inside the ring), and also (in the absence or malfunction of the electromagnet) from the valve itself running under the pressure of the supplied fluid. When upgrading the pump injector by the proposed method and using an annular control valve with electronic control (with optimal ring parameters), a new technical effect is achieved - reducing the response time of the control valve. This is due to the fact that the free edge of the split elastic ring, like a mechanical multiplier, blocks the drain canal π times faster than the valve stroke when it rises from the pressure of the fluid flow or signal when the electromagnet is on. The ring valve simultaneously acts as a spring to return to its original position, simplifying the design as much as possible. In the course of research, a new mathematical expression was derived for calculating the valve stroke depending on its design parameters. Using this formula, the optimal parameters of the control ring valve of the pump injector were established, which affect the quality of fuel injection in a wide range of diesel operation: diameter - 20 mm, ring width - 12 mm, thickness - 0.46 mm, diameter of the control fluid supply canal - 3 mm.

Lumped-Parameter Response Time Models for Pneumatic Circuit Dynamics

2020 ◽  
Vol 143 (5) ◽  
Author(s):  
Andrew A. Stanley ◽  
Amirhossein Amini ◽  
Casey Glick ◽  
Nathan Usevitch ◽  
Yiğit Mengüç ◽  
...  
Keyword(s):  
Response Time ◽  
High Speed ◽  
Response Times ◽  
Coefficient Of Determination ◽  
Response Time Models ◽  
Response Curves ◽  
Flow Restriction ◽  
Lumped Parameter ◽  
Fluidic Circuits ◽  
Timing Models

Abstract Resistor–capacitor (RC) response time models for pressurizing and depressurizing a pneumatic capacitor (mass accumulator) through a resistor (flow restriction) comprise a framework to systematically analyze complex fluidic circuits. A model for pneumatic resistance is derived from a combination of fundamental fluid mechanics and experimental results. Models describing compressible fluid capacitance are derived from thermodynamic first principles and validated experimentally. The models are combined to derive the ordinary differential equations that describe the RC dynamics. These equations are solved analytically for rigid capacitors and numerically for deformable capacitors to generate pressure response curves as a function of time. The dynamic pressurization and depressurization response times to reach 63.2% (or 1−e−1) of exponential decay are validated in simple pneumatic circuits with combinations of flow restrictions ranging from 100 μm to 1 mm in diameter, source pressures ranging from 5 to 200 kPa, and capacitor volumes of 0.5 to 16 mL. Our RC models predict the response times, which range from a few milliseconds to multiple seconds depending on the combination, with a coefficient of determination of r2=0.983. The utility of the models is demonstrated in a multicomponent fluidic circuit to find the optimal diameter of tubing between a three-way electromechanical valve and a pneumatic capacitor to minimize the response time for the changing pressure in the capacitor. These lumped-parameter models represent foundational blocks upon which timing models of pneumatic circuits can be built for a variety of applications from soft robotics and industrial automation to high-speed microfluidics.

scholarly journals Development of a novel high-speed actuation mechanism using a magneto-rheological fluid clutch and its application to a fluid control valve

2019 ◽  
Vol 30 (16) ◽  
pp. 2502-2516
Author(s):  
Shaoping Xiong ◽  
Gabriel Wilfong ◽  
John Lumkes
Keyword(s):  
Energy Source ◽  
Kinetic Energy ◽  
High Speed ◽  
Coupled Model ◽  
Control Valve ◽  
Design Solution ◽  
Design Parameters ◽  
Efficient System ◽  
Actuation Mechanism ◽  
Magneto Rheological

In many dynamic systems, such as vehicles, engine air and fuel control systems, fluid power systems, industrial robotics, and testing machines, high-speed actuators are necessary to achieve efficient system operation and high bandwidth performance. This article introduces a new actuation mechanism to enable high-speed actuation. The premise for this actuation mechanism is to momentarily couple a moving component (kinetic energy source) with translational components, which is enabled by a coupling/clutch system. The kinetic energy source (flywheel, electric motor, pump or motor shaft, etc.) is intermittently clutched and declutched to produce linear motion. This article presents such an energy coupler actuator using a magneto-rheological fluid clutch, initially focused on an application for high-speed valve actuation. A multi-physics coupled model was developed to evaluate the proposed energy coupler actuator performance. Simulations were conducted to optimize the energy coupler actuator design parameters. A prototype of the magneto-rheological fluid energy coupler actuator based on the optimal design solution was fabricated and experimentally tested, which achieved 1.6-mm stroke in 4.7 ms.

Analysis on the Influencing Factors of Dynamic Characteristics for the Linear Motion Station of DCG

2013 ◽  
Vol 437 ◽  
pp. 194-197
Author(s):  
Xiao Peng Li ◽  
Xing Ju ◽  
Guang Hui Zhao ◽  
Ya Min Liang ◽  
Hao Tian Yang
Keyword(s):  
Dynamic Characteristics ◽  
High Speed ◽  
Dynamic Performance ◽  
Cnc Machine Tools ◽  
Joint Surface ◽  
Design Parameters ◽  
Machining Accuracy ◽  
Cnc Machine ◽  
Element Analysis ◽  
Feed Drive

Dynamic characteristics of the system have been given more and more attention so as to improve the retention and reliability of machining accuracy. Research has shown that dynamic performance of the feed drive mechanism has significant impact on the processing quality and efficiency of CNC. This paper mainly focuses on the DCG which realizes its motion on the basis of a pair of lead screw. The dynamic performance of the DCG was analyzed by the method of finite element analysis. DCG structure and the key design parameters of the rail joint surface have been studied to find out the influence on its dynamic characteristics. These researches provided a basis for the realization of the CNC feed motion of high-speed and high-precision. Besides, it is also possible to improve the overall performance of CNC machine tools.

scholarly journals DIESEL INJECTOR PUMP WITH RING CONTROL VALVE

2020 ◽  
Vol 15 (1) ◽  
pp. 68-75
Author(s):  
Fanil' Gabdrafikov ◽  
Irshat Aysuvakov ◽  
Ilgiz Galiev
Keyword(s):  
Fuel Injection ◽  
Ring Width ◽  
Control Valve ◽  
Free Edge ◽  
Original Position ◽  
Design Parameters ◽  
Elastic Ring ◽  
Hydraulic Actuator ◽  
Wide Range ◽  
Ring Valve

The studies were carried out with the aim of modernizing the pump injector with a hydraulic actuator of the HEUI system plunger with the development of a control valve model based on a split elastic ring that provides fast fuel injection control. The upgraded device differs from the existing ones in that instead of a control freely floating valve (ball) or a poppet valve with springs, a valve in the form of a split elastic ring is installed in the valve assembly. One end of this ring is fixed rigidly, the other is freely movable to block the drain channel of the liquid. The canal overlaps the free edge of the ring when the electromagnet is turned on (installed with a gap inside the ring), and also (in the absence or malfunction of the electromagnet) from the valve itself running under the pressure of the supplied fluid. When upgrading the pump injector by the proposed method and using an annular control valve with electronic control (with optimal ring parameters), a new technical effect is achieved - reducing the response time of the control valve. This is due to the fact that the free edge of the split elastic ring, like a mechanical multiplier, blocks the drain canal π times faster than the valve stroke when it rises from the pressure of the fluid flow or signal when the electromagnet is on. The ring valve simultaneously acts as a spring to return to its original position, simplifying the design as much as possible. In the course of research, a new mathematical expression was derived for calculating the valve stroke depending on its design parameters. Using this formula, the optimal parameters of the control ring valve of the pump injector were established, which affect the quality of fuel injection in a wide range of diesel operation: diameter - 20 mm, ring width - 12 mm, thickness - 0.46 mm, diameter of the control fluid supply canal - 3 mm.

scholarly journals A New Adaptive Synergetic Control Design for Single Link Robot Arm Actuated by Pneumatic Muscles

Entropy ◽  
2020 ◽  
Vol 22 (7) ◽  
pp. 723
Author(s):  
Amjad J. Humaidi ◽  
Ibraheem Kasim Ibraheem ◽  
Ahmad Taher Azar ◽  
Musaab E. Sadiq
Keyword(s):  
Dynamic Performance ◽  
Optimization Technique ◽  
Control Design ◽  
Adaptive Controller ◽  
Design Parameters ◽  
Robot Arm ◽  
Synergetic Control Theory ◽  
Pneumatic Muscles ◽  
Optimal Dynamic ◽  
Synergetic Control

This paper suggests a new control design based on the concept of Synergetic Control theory for controlling a one-link robot arm actuated by Pneumatic artificial muscles (PAMs) in opposing bicep/tricep positions. The synergetic control design is first established based on known system parameters. However, in real PAM-actuated systems, the uncertainties are inherited features in their parameters and hence an adaptive synergetic control algorithm is proposed and synthesized for a PAM-actuated robot arm subjected to perturbation in its parameters. The adaptive synergetic laws are developed to estimate the uncertainties and to guarantee the asymptotic stability of the adaptive synergetic controlled PAM-actuated system. The work has also presented an improvement in the performance of proposed synergetic controllers (classical and adaptive) by applying a modern optimization technique based on Particle Swarm Optimization (PSO) to tune their design parameters towards optimal dynamic performance. The effectiveness of the proposed classical and adaptive synergetic controllers has been verified via computer simulation and it has been shown that the adaptive controller could cope with uncertainties and keep the controlled system stable. The proposed optimal Adaptive Synergetic Controller (ASC) has been validated with a previous adaptive controller with the same robot structure and actuation, and it has been shown that the optimal ASC outperforms its opponent in terms of tracking speed and error.

scholarly journals Idle Stroke Detection for a Fuel Injection Control Valve

2010 ◽  
Vol 43 (18) ◽  
pp. 499-504
Author(s):  
T. Müller ◽  
A. Kugi ◽  
G. Bachmaier ◽  
M. Gerlich
Keyword(s):  
Fuel Injection ◽  
Control Valve ◽  
Injection Control
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