Development Of Hardware-in-the-loop Simulation Platform For Marine Dual-fuel Engine Lambda Closed-loop Control System

Facing the two major problems of increasing energy demand and environmental pollution in today's society,in order to reduce the consumption of petroleum resources and reduce pollutant emissions,the development and research of diesel-gas dual-fuel engines is an effective solution,and the electronic control system The development is an important part of this.The development of electronic control systems includes the preparation of control logic,the study of control strategies,and the commissioning of controllers.Currently,with the rapid development of computer technology,many early development tasks can be completed on computers,effectively shortening the development process.Time and savings in development costs.The purpose of this paper is to provide support for the development of electronic control systems for dieselgas dual-fuel engines,such as control strategy MAP research and test environment setup.In this paper,the optimal control parameters of the supercharged air pressure(lambda)under the typical operating conditions of the dual fuel engine gas mode are studied to provide reference for the control strategy of the electronic control system.At the same time,the dual fuel engine hardware is developed.The ring simulation platform provides environment and objects for the development and debugging of electronic control systems.The main research contents and research results of this paper are as follows:(1)Using AVL FIRE software,a diesel engine was used as a research object to establish a multi-dimensional diesel engine performance simulation model,and the model was validated based on the cylinder pressure and heat release rate experimental report results.Under the condition that the original mechanical structure does not change,the diesel engine model is changed to the dual-fuel engine model by adding natural gas systems.For the dual-fuel engine gas mode,the DOE test design for different charge air pressures and lambdas was performed.The test results were analyzed and studied,and the supercharged air pressure lambda control reference map was developed.(2)According to the heat release rate data calculated by the multi-fuel engine's multi-dimensional performance simulation model,the heat release rate curve is parameterized and the control parameters such as charge air pressure,natural gas injection quantity,and fuel injection advance angle are studied.The influence of characteristic parameters.Taking these three control parameters as the input of the neural network model and the characteristic parameters of the heat release rate curve as the model output,the neural network prediction model of the dual fuel engine radiating law is trained;the model prediction results illustrate the accuracy of the model.(3)A dual-fuel engine real-time simulation model was established based on CRUISE M software.The trained neural network model was embedded in the real-time simulation model.Then the real-time model was compiled using the compiler tool and integrated into the LabCAR hardware-in-the-loop simulation platform.Hardware-inthe-loop simulation of the transmission signal channel configuration,and use LabCAR Operator EE software design test monitoring interface.The dissertation conducts research work on the modeling of dual-fuel engine,control parameter analysis,extraction of heat release rate parameters and hardware-inthe-loop simulation platform construction.The research results can provide reference for the control strategy of the dual-fuel engine electronic control system.The hardwarein-the-loop testing of the control system provides the environment.