面向需求覆盖的航天软件测试用例优化方法，研究了一种面向需求覆盖率的测试用例优化方法，用于提高测试效率，增加航天软件测试的有效性。-The optimization method of demand coverage of aerospace software test case, on a test suite optimization method oriented demand coverage, to improve test efficiency, increase the effect