机载余度计算机软件虚拟测试技术研究

Study of Redundancy Computer Software on Virtual Test Technology

余度技术是提高系统可靠性的重要手段,但目前多余度飞控计算机软件测试中普遍存在联调困难、测试周期长、模拟与同步精度有关的故障较为困难等问题;针对这些问题,提出了一种在单PC机上实现多余度软件虚拟测试的方法;由测试结果可以看出,该方法用多线程来模拟多余度,利用虚拟时钟来模拟多余度飞控计算机通信时的时间差,实现伪实时,可以精确地模拟余度计算机之间的时间差。

Redundancy has a very important role in the stability of the aircraft, but there are lots of diffculties in the multi-redundancy software testing, such as the joint testing, the long test cycle and difficulties in simulating synchronous. This paper proposed a virtual soft-ware testing method based on a PC. This method is to use multiple threads to simulate the extra degree, using of the virtual clock to simulate the time difference the extra degree of fly control computer communications, pseudo-real-time, can accurately simulate the time difference between the redundant computer.