The hardware system of SUAV can not guarantee the reliability of SUAV because it is constrained by system cost and other factors. So it is necessary to lean upon the reliability of the software system to complement and improve the reliability of SUAV. On the other hand, as the key sub-system of SUAV, the flight control system' s software reliability should be considered much more carefully. In this paper, the author describes the structure of the software of flight control system of SUAV and the methods and processes of the software reliability. And then, the author tests the reliability of the software using the white-box testing method and the standard of changed conditions/ determinant mantle. In the process of verification, comparing the path of the verifying process with the real path by designing four pair of different examinations. And the results of the exams show that the designing method satisfying the need of verifying the software reliability.%小型无人机硬件受系统造价及其他因素的影响,不能很好地保证小型无人机系统的整体可靠性,而必须通过软件来补充并提高小型无人机系统的整体可靠性;飞行控制系统作为无人机的核心子系统,它的软件可靠性成为了可靠性保证的重中之重.文中首先论述了某小型无人机飞行控制软件的系统结构以及软件可靠性设计的方法和过程,然后利用白盒测试方法结合修正条件/判定覆盖标准对该软件的可靠性进行了测试;测试过程中,通过设计4组不同的测试用例,检验这些用例所对应的测试路径是否与实际情况相同;实验结果表明,所设计的方法满足软件可靠性测试的需要.
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