火箭飞行时串测试误差分析研究

Research on the Test Error of Flying Time Sequence of Launch Vehicle

火箭飞行时串是按照时间序列输出的一系列指令参数,对其输出精度的测量是判断火箭正常飞行的重要依据;针对运载火箭飞行时串输出链路复杂,测试判读途径多的特点,首先分析了火箭飞行时串输出的原理,然后针对地测时串和遥测时串两种测试判读方法分析了时串测试误差的来源,地测时串误差主要来源于控制系统软件周期和时序线路延时;遥测时串误差主要来源于遥测采样编码误差和起飞信号接收误差;最后通过运载火箭某次任务出厂测试和飞行数据验证了对测试误差分析的正确性,并给出提高火箭飞行时串输出精度,减少测试误差的几种途径。

Flying time sequence of launch vehicle is a series of instruction parameters output.The measurement of its output precision is an important basis to judge the flight of rocket.In view of output link of launch vehicle's flying time sequence is complex and test interpretation is various,the principle of output flying time sequence is characterized firstly.Then according to the method of ground test and remote test of the time sequence,the source of test error from the whole link is analyzed.The source of ground test error is mainly from software cycle.While the source of remote test error is mainly from coding and sampling error,and the receiving error of take-off signal.Lastly,through the test data from one task of some rocket,the analysis of the test error is verified.Several approaches of improving the level of time sequence output precision and reducing the test error is put away.