The velocity fields measured by experiments or determined through simulations are essential in advancing our understanding of the complex atomization process impinging jets. However, existing methods expensive and time-consuming. In this study, we apply deep learning to estimation three-dimensional produced two Two models developed, namely, a liquid volume fraction (LVF) model based on Swin Transformer architecture field four-dimensional convolution (4D-Conv). dataset for training is...

In this article, a model predictive control strategy is presented for an all-speed governor of heavy-duty vehicles that satisfies the requirements fast tracking and fuel economy. The control-oriented torque-based engine used design control–based speed algorithm. Two methods improving economy synthesis are presented, which include load estimation variable weighting factor. mass to estimate real-time torque. factor based on driver’s intention adjust algorithm in MATLAB/Simulink. simulation...

Drivability is the key factor for automated manual transmission. It includes fast response to driver’s demand and driving comfort. This paper deals with a control methodology applied an transmission vehicle drivability enhancement during start-up phase. Based on piecewise model of powertrain, multiple-model predictive controller (mMPC) designed engine speed, clutch disc wheel speed as measurable input variables torque reference friction controller’s output variables. The not only dynamic,...

Opposed Piston Two Stroke (OP2S) engines are widely used for its high power density and thermal efficiency. For OP2S diesel engines, the scavenging process is accomplished by pressure difference between intake chamber exhaust chamber. 1-D model of engine built accuracy validated tracer gas method. Based on model, influence to studied. The results illustrated that: (1) in order obtain higher difference, should also be higher; (2) has vital exchange process. With incensement delivery ratio...

High rail pressure and multiple injections are crucial to improve diesel engine performance in terms of fuel efficiency exhaust emission. As a drawback, oscillations complex pressure-wave propagation phenomena have impact on the control accuracy response speed. Fuel metering valve, installed inlet high-pressure pump, is main mechanical actuator adjust value. In this paper, co-simulation model was established investigate dynamic process which divided into three phases. The motion dead zones...

In this paper, blast effect of oil-associated gas in injection wells is determined when using air displacement, and on basis, the relevant safety distance also. Numerical simulation used to calculate overpressure distribution, explosion energy TNT equivalence combustible wells. Based shock wave damage criterion, distances seven levels are obtained, which personnel minor injuries, severe death, destruction buildings with mild, moderate, manage destroying. Therefore, technical support provided...

Gasoline Direct Injection(GDI) engines with Common Rail system can strongly improve the performance of engine. In order to achieve advantages promised by this technology, rail pressure must satisfy requirement. work a method Linear Active Disturbance Rejection Controller(LADRC) based on characteristics common is proposed. To simplify parameter tuning process, Genetic Algorithm was used optimize controller. Focus further controller performance, Variable Parameter LADRC(VPLADRC) presented in...

Through the introduction to stevedoring process of LNG terminal, preliminary hazard analysis technique is applied distinguish and identify three potential dangerous factors which could cause fire explosion, corresponding lists are then established respectively. In end, risk levels explosion found out be betweenand, appropriate precautionary measures given different level, those provide scientific reference for putting forward safety management decision effectively.

This paper present integrate robust control Method for High-power Variable-Speed Governor of Diesel Engine by loop-shaping theory. working process and classical frequency theory are combined to construct restriction engine speed; compensator is utilized improve the robustness Multiplicative Perturbations disturbance; method applied design controller Engine. Simulation Bench test result show that has cutting off characteristic high-frequency excitation from Working Process achieve lower...

The common rail pressure has a direct influence on the working stability of Opposed-Piston Two-Stroke (OP2S) diesel engines, especially performance indexes such as power, economy and emissions. Meanwhile, overshoot phenomenon occurs frequently due to operating characteristics OP2S which could lead serious consequences. In order solve problem nonlinear concerted algorithm adding speed state feedback was investigated. First, Linear Parameter Varying (LPV) model utilized describe coupling...

This paper presents Active Disturbance Rejection Control system for Toggle-Motor coupling Servomechanism System. Genetic algorithm and mixed H2/H∞ norm index are utilized to optimize the parameters; Monte-Carlo method is applied evaluate robustness of control system. Simulation results show that under condition external disturbance, parameters perturbation coupling, this has cutting off characteristic high-frequency noises achieve lower sensitivity against disturbances in low frequency...

The risk of natural gas long-distance pipeline and main factors accidents are analyzed in this paper. According the consequences from above, quantitative assessment pipelines under specific accident scenarios completed with help numerical simulation model on leakage dispersion. What’s more, basis results, necessary conditions for safe operation presented. Finally, conclusions operations given paper helpful regular pipeline, prevention, emergency response reasonable supervision.

This paper proposed a kind of intelligent driving module based on the requirements high pressure common rail fuel injection system. Many functions this were designed such as current multiply holding , boosting and energy recovering. occupies less microcontroller resources makes injectors solenoid valve pull more smoothly. The experimental results show that valves peak can achieve to 20A within 0.1 ms storage capacitys potential was not changed significantly. could circuit.

The accurate and available engine rotate speed signal is quite essential to control, fault diagnosis, etc.This paper analyses the parameters optimization towards common processing methods of speed, aiming at internal combustion closed-loop control.Basing on Matlab/xPC target simulation platform with controlling self-designed device，it puts forward a series simulink model achieves way process real rotae signals.Finally it realised steady condition control after relevant optimization, which...

Boilers BLEVE are among the most devastating accidents likely in chemical process industry, which lead to shock waves and rocketing fragments of ruptured vessels. The prediction boiler explosion energy its impact is fairly helpful prevention protection accidents. Phast software used for quantitative assessment a consequence through build-up pertinent model paper, affords results form simulation charts reports with energy, blast-wave overpressure effect radius, positive phase impulse as well....