Long March 7 rocket control system reliability up to 0.998
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The Long March 7 rocket is a brand-new rocket, and its "brain" is also new. Compared with active rockets, its control technology has achieved a new upgrade. It not only has superior adaptability to possible failures, but is also more reliable and smarter, and its key technologies have reached the international advanced level.
More reliable: 3 "information superhighway" backup reliability of 0.998 each
“The Long March 7 rocket is designed according to the standards of a manned rocket with a reliability index of 0.98, which is even higher than the 0.97 reliability index of the active Long March II F rocket.†said Song Zhengyu, Deputy Chief of the Long March 7 rocket control system. In the design of the rocket, the reliability index assigned to the control system was 0.998, while the value of the current manned rocket was 0.991.
Compared to a few simple data, it seems to be a bit worse, but it is a qualitative leap over rocket reliability design.
According to reports, the Long March 7 rocket control system uses the "all-digital distributed fault-tolerant control technology" of "three buses and six channels" to realize the three-redundancy design of the data bus.
“Informally, we built three 'information highways' in the 'brain' of the Long March VII rocket for real-time rocket control and integrated information management, and each 'highway' is still two-lane." Song Zhengyu said that this would not only avoid the congestion of information, but also that the three 'highways' are backups to each other. Even if any one of them fails, it will not affect the normal flight of the rocket. In the event of a failure, the rocket is still flying reliably, and it also has a certain ability to adapt to the second failure.
Song Zhengyu introduced that the design idea of ​​the “Brain†of the Long March 7 rocket is similar to that of the US SLS rocket, but the system architecture is more concise and the scalability is stronger.
"Since the beginning of the design, we have used scalable properties as an implicit design requirement, because the development cycle is long, otherwise the technology may have fallen behind when it was first put into use. Now, even 20 years later, with the Long March 7 rocket With the upgrading of technology and the extension of functions, the control system can still guarantee the advanced nature.†Three “information superhighways†ensure the smoothness of the control and information transfer of the Long March 7 rocket.
Smarter: Real-time self-diagnosis of faults Many people believe that the "Overheard" movie is no stranger to a small device that can easily eavesdrop and locate each other's location and information. During the flight of the Long March 7 rocket, there was also an "overhearing situation." Song Zhengyu introduced that the Long March 7 rocket control system used a "bus tapping" technology. "In the 'brain' of the rocket, a 'wire-tapping' device was installed. All the important parameters that we acquired during the testing process were automatically 'eavesdropped'." In this way, the flight control software can concentrate on flying without transmission. Flight parameters distracted.
The smarter thing is that during the ground inspection and testing of the Long March VII rocket, the ground test system was designed to perform self-diagnosis on the rocket control in real time. Once any equipment has a little fault at a certain moment, it can be Grab it now. After the test is over, the technicians can immediately get the rocket's diagnostic report.
“In the past, experts and technicians spent at least half a day on data interpretation in rocket testing. Today, automatic interpretation not only saves a lot of work, but also reduces the number of expert personnel who can provide on-site technical support. The automatic interpretation method is still used for the first time on the Long March rocket.†Song Zhengyu said that in the near future, they can also remotely interpret the data remotely.
It seems that as a new generation of launch vehicles, the new design of the “brain†of the Long March 7 rocket has brought the technical strength of the Long March rocket to a new height.
(Original title: The "brain" of the Long March 7 rocket has reached a world-leading level with more reliable and smarter key technologies.)