Experimental Validation of a Hybrid Analytical-FEM Model of an Electromagnetic Engine Valve Actuator and Its Control Application

Gaeta, Alessandro di; Montanaro, Umberto; Giglio, Veniero

doi:10.1109/tmech.2012.2194164

Cited by 15 publications

(20 citation statements)

References 4 publications

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“…A nonlinear relationship for magnetic force as a function of distance and current has been also presented in [32]. Further details on the parameter identification procedure and experimental validation of the system model (1) can be found in [20,21]. Further details on the parameter identification procedure and experimental validation of the system model (1) can be found in [20,21].…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…The proposed control strategy does not require the use of a further "kick-off" control action to trigger the first valve oscillation, that instead was mandatory in [20]. The effectiveness of the control approach is tested for different friction conditions by simulating a highly predictive lumped parameter model of the valve actuator [14,21]. u 0 ) as it were a second control parameter.…”

Section: Introductionmentioning

confidence: 99%

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Valve Position‐based Control at Engine Key‐on of an Electro‐mechanical Valve Actuator for Camless Engines: A Robust Controller Tuning Via Bifurcation Analysis

Velasco¹,

Gaeta²

2015

Asian Journal of Control

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Electro-mechanical valve actuators (EMVA) formed by two opposed electromagnets and two balanced springs are appealing solutions to implement advanced combustion concepts for camless engines. A crucial control problem for this valve actuator regards the first valve lift manoeuvre (termed 'first catching') to be rapidly performed after each insertion of the engine ignition key, when the EMVA rests at middle position where electromagnets offer low control authority. The control problem is challenging due to system nonlinear behavior. Mathematically, the EMVA system can be assumed to be a spring-mass impacting system affected by a non-smooth friction force and a dynamic saturated magnetic force. In this work an effective valve position-based first catching control strategy is proposed to control the strongly nonlinear system. Bifurcation analysis and parameter space simulations are used to study the closed-loop system behavior and to tune the controller gains as well. The effectiveness of the control approach is validated through numerical simulations of a highly predictive dynamic model of the valve actuator developed by authors in a previous work.

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Section: Mathematical Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Valve Position‐based Control at Engine Key‐on of an Electro‐mechanical Valve Actuator for Camless Engines: A Robust Controller Tuning Via Bifurcation Analysis

Velasco¹,

Gaeta²

2015

Asian Journal of Control

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“…where  (0,̂2) is a Gaussian distribution with mean zero and standard deviation̂= 0.01 m/s. The probability density function (PDF) was tuned using experimental data [30] and [48]. Simulations are carried out when considering a fixed value of friction, i.e.…”

Section: Control Performances Under Measurement Uncertaintymentioning

confidence: 99%

Cycle‐by‐Cycle Adaptive Force Compensation for the Soft‐Landing Control of an Electro‐Mechanical Engine Valve Actuator

Gaeta¹,

Velasco²,

Montanaro³

2014

Asian Journal of Control

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Electro-mechanical valve actuators (EMVA) are a solution for implementing variable valve actuation in internal combustion engines. Their use can increase engine power, reduce fuel consumption and pollutant emissions, while significantly improving engine efficiency. The control of this actuator is a complex task since non-smooth nonlinearities, parameter variations and external forces strongly affect plant dynamics. In addition, the impact of the valve at its end-strokes translates into mechanical wear and unacceptable noise, and in the worst case the electromagnet may also fail to catch the valve, causing system failure. The design of effective control strategies to ensure valve capture with low impact velocities is therefore essential for the correct functioning of such a mechatronic device. In this paper, the control problem of reducing the impact velocity at "landing" known in the literature as soft landing control, is tackled via novel cycle-by-cycle adaptive force compensation control algorithms. Two schemes are presented: a discrete adaptive proportional integral controller to regulate landing velocity to a preassigned set-point, and a gradient descent method based controller to automatically achieve the minimum admissible impact velocity. The effectiveness of both methods in limiting landing velocities is shown numerically using a high predictive simulator of the EMVA system, when considering unknown varying environmental conditions, such as internal friction and external gas pressure forces.

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“…Recent contributions also treat modeling and design of fastswitching valves with direct electro-magnetic actuators, both for general purpose hydraulic valves [19] and within the field of internal combustion engines [20], [21]. These contributions make use of finite-element analysis (FEA) in different forms to model the behavior of the electromagnetic actuators, and some uses FEA as an integrated part of the design optimization process [19], [20].…”

Section: Introductionmentioning

confidence: 99%

Optimum Design of a Moving Coil Actuator for Fast-Switching Valves in Digital Hydraulic Pumps and Motors

Roemer

Bech

Johansen

et al. 2015

IEEE/ASME Trans. Mechatron.

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Fast-switching seat valves suitable for digital hydraulic pumps and motors utilize direct electromagnetic actuators, which must exhibit superior transient performance to allow efficient operation of the fluid power pump/motor. A moving coil actuator resulting in a minimum valve switching time is designed for such valves using transient finite-element analysis of the electromagnetic circuit. The valve dynamics are coupled to the fluid restrictive forces, which significantly influence the effective actuator force. Fluid forces are modeled based on transient computational fluid dynamics models. The electromagnetic finite-element model is verified against experimental measurement, and used to design an optimum moving coil actuator for the application considering different voltage-current ratios of the power supply. Results show that the optimum design depends on the supply voltage-current ratio, however, the minimum switching time obtained is nearly independent on this voltage-current ratio. Selecting a suitable power supply based on thermal considerations yields a switching time just above one millisecond for a travel length of 3.5 mm while submerged in oil. The proposed valve has a pressure drop below 0.5 bar at 600 L/min flow rate, enabling efficient operation of digital hydraulic pumps and motors.

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Experimental Validation of a Hybrid Analytical-FEM Model of an Electromagnetic Engine Valve Actuator and Its Control Application

Cited by 15 publications

References 4 publications

Valve Position‐based Control at Engine Key‐on of an Electro‐mechanical Valve Actuator for Camless Engines: A Robust Controller Tuning Via Bifurcation Analysis

Valve Position‐based Control at Engine Key‐on of an Electro‐mechanical Valve Actuator for Camless Engines: A Robust Controller Tuning Via Bifurcation Analysis

Cycle‐by‐Cycle Adaptive Force Compensation for the Soft‐Landing Control of an Electro‐Mechanical Engine Valve Actuator

Optimum Design of a Moving Coil Actuator for Fast-Switching Valves in Digital Hydraulic Pumps and Motors

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