Signal matching method and signal matching device for vehicle engine hardware-in-loop simulation process

Abstract

The invention relates to a signal matching method and a signal matching device for a vehicle engine hardware-in-loop simulation process. On the background and the base of a traditional engine hardware-in-loop simulation system, signal matching circuits are arranged between a target machine and an engine ECU (electronic control unit), and respectively used for performing matching on a low-speed signal and a high-speed signal. According to the signal matching method and the signal matching device, the signal matching problems between a data acquisition card of the target machine and the engine ECU during vehicle engine hardware-in-loop simulation are solved mainly; not only can level switch be realized but also the generation and the acquisition of the high-speed signal during the simulation process can be completed by utilizing hardware; the requirement of the simulation on the performance of a hardware-in-loop simulation platform can be effectively reduced; real-time simulation performed by the model by a smaller step size can be realized by utilizing a simulation platform with lower configurations.

Description

technical field [0001] The invention relates to the technical field of vehicle engine hardware-in-the-loop simulation testing, in particular to a signal matching method and device in the process of vehicle engine hardware-in-the-loop simulation. Background technique [0002] The modern automotive electronics development process often adopts the V-shaped model. Compared with the traditional development process, it has the advantages of high development efficiency, time-saving, labor-saving, and low development risk. Hardware-in-the-loop simulation is a part of the V-shaped development process. In the development process of the vehicle engine control system, the technology of using hardware-in-the-loop simulation mainly refers to using the real-time simulation model of the engine instead of the physical engine as the control object, and converting the operation results of the simulation model through the data acquisition card or other types of interface conversion circuits. Co...

AI Technical Summary

Problems solved by technology

[0006] According to domestic and foreign literature, the known signal matching methods of hardware-in-the-loop simulation are as follows: 1) For crankshaft and camshaft signals, they are directly calculated and generated by hardware-in-the-loop simulation platform and output through data acquisition card, but this method is not suitable for real-time The calculation speed of the simulation platform is high, and the distortion caused by the low sampling rate will appear when the speed is high; 2) The way of using the crankshaft and camshaft signals to simulate the occurrence, including the use of FPGA, CPLD and other high-speed programmable logic devices to achieve There are two methods of crankshaft and camshaft signal simulation generation and using analog circuits. The former uses a dedicated data board to calculate real-time costs and is inflexible for single-function applications. The latter has a fixed circuit structure and cannot simulate different types of sensors; 3) Modify the data interface of the ECU controller, use the communication interface or simplify the sensor signal to make it meet the data type of the hardware-in-the-loop simulation platform, but this method has modified the function of the real engine control ECU, and there is no way to change all the functions of the product. Tested, limited application

[0007] The above existing known engine hardware-in-the-loop simulation signal matching methods still have shortcomings

Images