发动机传感器故障硬件在环仿真平台研究

Research on a Hardware-in-the-loop Simulation Platform of Engine Sensor-Fault

针对发动机电控系统传统开发方法中存在的局限性,提出了一种传感器故障模拟系统的建立方法。首先,在LabVIEW、VeriStand开发环境下,为发动机电控系统功能测试开发了硬件在环仿真平台;其次,利用该平台对节气门位置、进气压力、冷却水温等传感器进行了信号故障模拟;最后,以节气门位置传感器信号故障为例,对所开发的故障容错功能包的有效性进行了验证,并将仿真结果与实车测试结果进行了对比。结果表明,利用该方法建立的系统符合测试要求,且具有使用方便、可靠性强、精度高等特点。

Considering the limitation of traditional development method of engine management system（EMS）, a method to establish sensor--fault simulation system was proposed. Firstly, a hard- ware--in--the--loop simulation platform, which was used for EMS function test, was developed in the LabVIEW and VeriStand environment. Secondly, by using this platform, a sensor--fault simula- tion system was set up for throttle position, intake air pressure, and engine water temperature. Final- ly, the real vehicle test of throttle position sensor--fault, for example, verified the effectiveness of the developed fault--tolerant packet. Then comparison between simulation and real vehicle test shows that the system established by this method can satisfy the test requirements, and has the advantages of higher reliability, convenience and precision.