Chapter 9
OBDH Technology of Lunar Lander
9.1 Introduction
The OBDH subsystem is an important subsystem of spacecraft. It is designed to
monitor and control the spacecraft in a computer-based integrated system to provide
synthetic services and management for the spacecraft platform and payload [1].
The information acquired by the spacecraft comes from its own, other spacecraft,
and the ground station. The major information includes the downlink telemetry data
and the uplink telecommand. Through the acquisition, processing, storage, transmission and distribution of these information, the monitoring and control of the
spacecraft can be implemented. The functions of telemetry, telecommand, programcontrolled, autonomous control and management of spacecraft can be integrated by
data management technology in a microprocessor-based system and the computers
are connected by the onboard data bus (or computer network). The telemetry
and telecommand computers are connected and then all the onboard computers
are connected to the network to implement the maximum centralized and unified
management of the spacecraft information, sharing information and supporting
the autonomous close-loop control of the spacecraft. Along with the development
of OBDH system, the on-board software system has been developed to enhance
scalability, maintainability and autonomy of the spacecraft.
New requirements including high-performance, high-reliability, intelligence, and
integration of electronic systems have been come up for lunar landing mission [2].
For example, the OBDH subsystem of the Chang’E-3 lunar lander should accomplish TT&C, operation scheduling and comprehensive information processing. It also
managed and controlled the operation of each task efficiently and reliably including
monitoring of the status of the lunar lander, coordination of tasks, and management of thermal control, energy and mechanisms, as well as management and data
processing for all onboard payloads, scientific instruments to implement unified
onboard processing and sharing of information.
In order to meet the special requirements of mass and power, the integrated electronic technology was applied in OBDH subsystem of the lunar lander to implement
© National Defense Industry Press and Springer Nature Singapore Pte Ltd. 2021
D.-Y. Yu et al., Technology of Lunar Soft Lander, Space Technology Library 38,
https://doi.org/10.1007/978-981-15-6580-9_9
303
OBDH Technology of Lunar Lander
9.1 Introduction
The OBDH subsystem is an important subsystem of spacecraft. It is designed to
monitor and control the spacecraft in a computer-based integrated system to provide
synthetic services and management for the spacecraft platform and payload [1].
The information acquired by the spacecraft comes from its own, other spacecraft,
and the ground station. The major information includes the downlink telemetry data
and the uplink telecommand. Through the acquisition, processing, storage, transmission and distribution of these information, the monitoring and control of the
spacecraft can be implemented. The functions of telemetry, telecommand, programcontrolled, autonomous control and management of spacecraft can be integrated by
data management technology in a microprocessor-based system and the computers
are connected by the onboard data bus (or computer network). The telemetry
and telecommand computers are connected and then all the onboard computers
are connected to the network to implement the maximum centralized and unified
management of the spacecraft information, sharing information and supporting
the autonomous close-loop control of the spacecraft. Along with the development
of OBDH system, the on-board software system has been developed to enhance
scalability, maintainability and autonomy of the spacecraft.
New requirements including high-performance, high-reliability, intelligence, and
integration of electronic systems have been come up for lunar landing mission [2].
For example, the OBDH subsystem of the Chang’E-3 lunar lander should accomplish TT&C, operation scheduling and comprehensive information processing. It also
managed and controlled the operation of each task efficiently and reliably including
monitoring of the status of the lunar lander, coordination of tasks, and management of thermal control, energy and mechanisms, as well as management and data
processing for all onboard payloads, scientific instruments to implement unified
onboard processing and sharing of information.
In order to meet the special requirements of mass and power, the integrated electronic technology was applied in OBDH subsystem of the lunar lander to implement
© National Defense Industry Press and Springer Nature Singapore Pte Ltd. 2021
D.-Y. Yu et al., Technology of Lunar Soft Lander, Space Technology Library 38,
https://doi.org/10.1007/978-981-15-6580-9_9
303