双捷联冗余技术在长征二号丁运载火箭上的研发与实践

Development and Implementation of Dual-Strapdown Inertial Redundant Technology in CZ-2D Launch Vehicle

介绍了双捷联冗余技术在长征二号丁(CZ-2D)运载火箭上的研发与实践。阐述了采用双八表惯组和光纤惯组的必要性,以及激光/光纤双捷联惯组的优势。给出了基于采用主从冗余设计的激光/光纤双捷联控制系统的组成,以及突破的故障诊断与决策、全方位发射、组合导航、方位瞄准及参数测量、三CPU冗余计算机等关键技术。飞行试验验证了双捷联冗余技术总体设计的正确性。展望了运载火箭惯导技术中二度故障重构率提高、组合导航改进、双捷联主备份互换、大角度空中滚转定向、十表惯组应用等的后续发展。双捷联冗余控制系统的应用,提高了全箭飞行可靠性和任务适应性,以及入轨精度,减轻了火箭末子级的质量,增大了运载火箭的运载能力,为光纤惯组在运载火箭中的应用积累了成功子样。

The development and implementation of dual-strapdowm inertial redudant technology in CZ-2D launch vehicle was introduced in this paper.The application necessity of two 8gyros/accelerometers and fiber gyro and the advantage of laser/fiber inertial unit were presented.The control system of dual laser/fiber inertial unit using master and slave redundant design was given out.The breakthrough key technologies of fault diagnosis and decision making,omni-directional launch,integrated navigation,azimuth aiming and its parameter measurement,and 3redundant CPUs were presented.The overall design of the dual strapdown intertial redundant in CZ-2D launch vehicle had been proved by the flight.The rising of two degree fault reconstruction rate,improving of integrated navigation,switching between main and secondary unit,rolling orientation with large angle and 10 gyros/accelerometers application for follow-on development were proposed.The application of dual strapdown inertial redundant technology has improved the flight reliability and mission adaptability as well as injection accuracy,and it has also reduced the mass of final stage and enhanced the launching ability of the vehicle.It accumulated the success samples of fiber gyro application in launch vehicle.