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| Precise timing of HLA-based hardware-in-loop simulation for vehicles |
| YU Xiao-yong, WEI Yan-ding, HUANG Mang-mang, ZHOU Xiao-jun, YANG Chen-long |
| State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China |
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Abstract Hardware-in-loop simulation architecture of vehicles was designed based on high level architecture (HLA) standard. Various precise timing techniques on Windows were analyzed in order to solve the real-time performance. Timing precision of timing techniques on Windows was tested with digital signal processor (DSP) and digital oscilloscope by using testing program on VC++. High-precision timer was appended to the manager federate based on HLA to control the simulation step and improve the realtime performance of the HLA simulation system. No datapackage error and data transmission delay appear in the simulation period, which ensures synchronization of the data transmission．
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Published: 01 July 2012
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基于HLA的车辆半实物仿真中精确定时方法
在基于高层体系结构(HLA)标准设计车辆半实物仿真平台的体系结构中,为了解决仿真中遇到的实时性问题,分析Windows中的各种精确定时技术.利用VC++编制的测试程序,结合DSP硬件和数字示波器分别对Windows中定时技术的定时精度进行测试.通过在基于HLA的管理者联邦成员中添加高精度定时器来实现仿真步长的控制,改善了基于HLA仿真系统实时性性能不足的问题,在仿真周期内没有出现数据包丢失和数据传输延迟的问题,保证了系统数据通讯的同步要求.
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