Diesel Engine Control System Research Articles

Динамическое имитационное моделирование системы возбуждения синхронных генераторов стационарных дизель-генераторных установок аварийного электроснабжения атомной станции

In the article, using MatLab dynamic simulation modeling, a study was made of the excitation systems of powerful synchronous generators of stationary diesel generator sets, which are the main sources of emergency power supply for nuclear power plants. The optimal structural complexity mathematical model of a synchronous machine in relative units and orthogonal synchronous coordinate system is used. A comprehensive simulation of diesel generator sets was carried out with the reproduction of both the dynamics of the automatic control system for excitation of a synchronous generator and the diesel engine control system. The simulation takes into account the features of starting a diesel generator to accelerate a synchronous machine, its initial excitation from a battery. Particular emphasis is placed on the study of self-excitation modes through a transformer connected to the stator circuit of the generator and a thyristor rectifier with an excitation winding as a load, as well as parallel operation with the power system. As a result, the processes of starting a diesel generator set in idle mode, effective self-excitation, autonomous operation of the generator at idle, and applying a load to the generator up to the values of permissible overload were simulated. The work of all channels of the control system is shown, including the signals of the regulators of the automatic control system and mechanical variables that are inaccessible in practice. The adequacy of the developed model is proved by comparison with a real physical experiment when testing a diesel generator at a nuclear power plant. The possibility of using the model developed in MatLab as a virtual test site for testing a diesel generator set and a computer simulator for specialized engineering personnel of a nuclear power plant is demonstrated.

Self-tuning Method of Electronic Governor Parameters for Marine Medium-speed Diesel Engine

Xu, C. and Xu, H., 2020. Self-tuning method of electronic governor parameters for marine medium-speed diesel engine. In: Yang, Y.; Mi, C.; Zhao, L., and Lam, S. (eds.), Global Topics and New Trends in Coastal Research: Port, Coastal and Ocean Engineering. Journal of Coastal Research, Special Issue No. 103, pp. 378–381. Coconut Creek (Florida), ISSN 0749-0208.In view of the importance of electronic governor in marine diesel engine and the poor stability and fault-tolerance of the research results on parameter self-tuning, a self-tuning method of electronic governor parameter for marine medium-speed diesel engine based on fuzzy PID is proposed. Based on the electronic governor control system of diesel engine, the self-tuning environment of electronic governor parameters is built by using real actuator and rapid control prototype hardware, and the self-tuning scheme of electronic governor parameters is studied. Considering the non-linearity and time-varying characteristics of diesel engine, the self-tuning of electronic governor parameters is realized by using adaptive fuzzy PID control technology and variable universe idea. The experimental results show that the proposed method can effectively enhance the fault-tolerance in the process of parameter self-tuning by means of fuzzy control. Its stability is superior to the reference results, and it has reliability.

Fuel controlling system concepts in modern diesel engines based on smart materials

The article describes potential ideas of the use of electroactive polymers as elements of the diesel engine control system for minimization of harmful emissions. The first results of testing electroactive polymers for above-mentioned aims are presented.

Observer-based event-triggered output feedback control for fractional-order cyber–physical systems subject to stochastic network attacks

This paper is engaged in investigating the observer-based event-triggered output feedback control issue for fractional-order cyber–physical systems with stochastic network attacks, where the order scale of the fractional derivative used is 0<α<1. An event-triggered scheme (ETS) with output-independent threshold is proposed to renew the observer input so as to reduce the redundant data communications. Considering the effects of the ETS and network attacks, a novel closed-loop fractional-order control system model is constructed. By making use of fractional-order Lyapunov indirect approach, sufficient conditions that can insure the global stochastic asymptotic stability of the established closed-loop control system are obtained. Moreover, according to the singular value decomposition (SVD) of matrix, the co-design of the gains of the desired observer and controller is addressed by finding the solution of the linear matrix inequalities (LMIs). Finally, a numerical example and a diesel engine control system are provided to validate the feasibility of the adopted observer-based control method.

Research on Application of New Type Marine Intelligent Diesel Engine Control System

Nowadays, with the increasing cost of shipping and fuel oil, more and more countries pay attention to the energy saving and emission reduction of marine main diesel engine. The application of marine intelligent diesel engine is more and more extensive. This paper studies the common rail fuel system of intelligent diesel engine represented by RT-flex, and analyses the comparison between marine traditional diesel engine and marine intelligent diesel engine, Simultaneous analysis the advantages of intelligent diesel engine. Based on the characteristics of electronic control common rail of RT-flex diesel engine, the structure and principle of fuel common rail and servo common rail are analyzed. On this basis, the intelligent diesel engine control system is mainly studied. At the same time, the application of flex View software of control system is also studied.

Development of numerical method to simulate flows around a ship at propulsion conditions in regular waves coupling with the ship propulsion plant model

A numerical method to simulate flows with propeller effects including the response of a ship propulsion plant has been developed. The dynamics of a ship propulsion plant is modeled by the function of the diesel engine control system. Propeller torque which is computed by the propeller model with the interaction to the flow fields is put into the ship propulsion plant model, then, the propeller rotational speed is obtained by solving the equation of the rotational motion of a propeller shaft line. Present method can reproduce the fluctuations of propeller rotational speed and torque in the condition with the regular head waves. The amplitude of fluctuations shows agreement with the measured data. The detailed analysis of the flow fields with ship motions which is difficult to be obtained at experiments is also carried out.

Evaluation of a Diesel Engine Control System with a Combustion Control Model in Transient Engine Operation

Evaluation of a Diesel Engine Control System with a Combustion Control Model in Transient Engine Operation

Diesel engine torsional vibration control coupling with speed control system

The coupling problems between shafting torsional vibration and speed control system of diesel engine are very common. Neglecting the coupling problems sometimes lead to serious oscillation and vibration during the operation of engines. For example, during the propulsion shafting operation of a diesel engine, the oscillation of engine speed and the severe vibration of gear box occur which cause the engine is unable to operate. To find the cause of the malfunctions, a simulation model coupling the speed control system with the torsional vibration of deformable shafting is proposed and investigated. In the coupling model, the shafting is simplified to be a deformable one which consists of several inertias and shaft sections and with characteristics of torsional vibration. The results of instantaneous rotation speed from this proposed model agree with the test results very well and are successful in reflecting the real oscillation state of the engine operation. Furthermore, using the proposed model, the speed control parameters can be tuned up to predict the diesel engine a stable and safe running. The results from the tests on the diesel engine with a set of tuned control parameters are consistent with the simulation results very well.

Design on Fuzzy Neural Network PID Control System of Diesel Engine

The diesel engA control system of diesel engine speed regulation based on the structure of fuzzy neural network is proposed in this paper, which is combined with PID controller in order to regulate PID parameters dynamically. The simulation result proves that the system has good control capability and robust stability, as well as good self-study and self-adaptive ability.

Design and Realization of Control Module Fault Analysis System Based on Fault Tree

In the process of equipment support for diesel engine control system of a certain type of ship, aiming at the problem of fault location of circuit module is complex and low efficient, the circuit module fault tree of control system is established based on fault tree theory. Qualitative and quantitative fault analysis is processed. The control module fault analysis software is researched and developed. The practical application shows that the functional fault control module can be analyzed and diagnosed fast and accurately. And the control module fault can be accurately positioned and processed.

Low-Speed Common Rail Diesel Engine Electronic Control System Structure and Working Principle in Electrical Control Engineering

The performance of Diesel engine control system influence the engine combination property directly. The traditional mechanical control system can't meet the requirements of the fuel consumption and emissions. We should turn to the advanced electronic control system. This article introduced the basic frame and control mode of low-speed common rail diesel engine electronic control system, and according to the control object, the whole control system is divided into different modules to detailed analysis.

Study on the Speed Control of Diesel Engine Based on Neural Sliding Mode Control

A neural adaptive controller based on System Recognition and sliding mode control theory is proposed. Matlab/Simulink simulations show that the controller has a good performance in the speed control system of diesel engine.

Realization of the Closed Cycle Diesel Control System

The exhaust gas produced by the diesel engine is reclaimed to the mixing chamber where it was mixed with pure oxygen and argon. The mixture which forms "artificial air" will be used as the diesel intake to achieve the diesel engine’s working in closed cycle. The most critical part in closed cycle diesel engine control system is to control the oxygen concentration and specific heat of the intake. This paper is based on the design of GE9030-based PLC and the monitoring interface used in this paper is designed by KingView6.53, finally, the control of specific heat of the intake, concentration of the oxygen intake and pressure of the intake are realized. Moreover, real-time displaying, gathering and fault alarm of the operating parameters in this system are achieved.

Fuzzy Modeling of Diesel Engine using Modified Self-Organizing Map Network

This article deals with a problem of nonlinear identification of big power diesel engine 12V1802J equipped on locomotive. A new nonlinear fuzzy model is proposed. The model is identified as black-box model with input-output training data. A modified self-organizing map (MSOM) network is developed for generating parameters of fuzzy model. Based on the MSOM, fuzzy rules are determined automatically according to the distribution of training data in the input-output space and the given approximating error. Simulating result indicates that the nonlinear model depicts the statics and dynamics of diesel engine accurately. This nonlinear model can be used to design the control system of diesel engine, and understand its complex dynamics.

Fuzzy Control System of Diesel Engine - Example Problems of Architectures

At present stage of internal combustion engines development the mechanical speed governors are more frequently replaced with governors allowing digital control of Diesel engine operation. In the paper there are presented the requirements imposed on the electronics controller of Diesel engine. There are also presented some chosen results obtained for Diesel engine investigations, controlled by the digital controller with different control rules while working in steady state conditions and transient conditions.

Three ethical revolutions: Ancient assumptions remodeled under pressure of transplantation

The coupling problems between shafting torsional vibration and speed control system of diesel engine are very common. Neglecting the coupling problems sometimes lead to serious oscillation and vibration during the operation of engines. For example, during the propulsion shafting operation of a diesel engine, the oscillation of engine speed and the severe vibration of gear box occur which cause the engine is unable to operate. To find the cause of the malfunctions, a simulation model coupling the speed control system with the torsional vibration of deformable shafting is proposed and investigated. In the coupling model, the shafting is simplified to be a deformable one which consists of several inertias and shaft sections and with characteristics of torsional vibration. The results of instantaneous rotation speed from this proposed model agree with the test results very well and are successful in reflecting the real oscillation state of the engine operation. Furthermore, using the proposed model, the speed control parameters can be tuned up to predict the diesel engine a stable and safe running. The results from the tests on the diesel engine with a set of tuned control parameters are consistent with the simulation results very well.

Toyota's New Microprocessor-Based Diesel Engine Control System for Passenger Cars

A new microprocessor-based diesel engine control system was introduced into the Japanese market by Toyota Motor Corporation in August, 1982. This system controls fuel quantity, injection timing, idle speed, glow plug current, and intake air flow. Its characteristics are as follows: 1) significantly increased flexibility for system expansion through adoption of a microprocessor; 2) optimization of the governor and injection timing characteristics through table look-up and interpolation methods; 3) high accuracy of various processing procedures through the use of a newly designed microprocessor; 4) high control accuracy and quick response from an analog servo system through the use of a newly developed linear solenoid and noncontact variable inductance sensors; and 5) high safety and serviceability through the addition of various fail-safe and diagnostic functions.