SEARCH · Search NASA
Results for “spacecraft guidance and control”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Spacecraft thermal control
Guidance for the assessment and control of spacecraft temperatures is provided with emphasis on unmanned spacecraft in the space environment. The heat balance, elements of thermal design, and thermal control are discussed along with thermal testing, design criteria, and recommended practices.
Spacecraft Guidance, Navigation, and Control Interface Standards Initiative : Overview
Explore the source record for details and available documents.
Gemini guidance and control.
Gemini guidance and control, discussing design, ground monitoring, launch and flight guidance, spacecraft instrumentation, maneuvering, etc
Robust Vision-based Multi-spacecraft Guidance Navigation and Control using CNN-based Pose Estimation
In this paper, we present an end-to-end simulation framework for tracking an uncooperative Target spacecraft in Low Earth Orbit using a CubeSat-class Ego spacecraft outfitted with a camera. Currently, capturing high-fidelity realistic images in space for this scenario is difficult and exorbitantly expensive. Therefore, we developed a framework to simulate the spacecraft orbits in Basilisk software and generate high-fidelity realistic images of spacecraft in Unreal Engine, including the effects from Sun, Earth, Moon and stars. The Ego spacecraft uses cameras to capture images of the uncooperative Target and estimates its position and attitude using a CNN based 6DOF pose estimation pipeline, eliminating need for large SWAP-C(Size, Weight, Power and Cost) sensors like LIDAR or reliance on inter-spacecraft communication, This CNN, which is motivated by ESA’s Pose Estimation challenge of 2019, is trained using simulated data from our end-to-end simulation framework. We compare the performance of two distinct CNNbased algorithms for pose estimation along a nominal trajectory. In presence of non-Gaussian modeling uncertainties, the statedependent estimation error is characterized with a quadratic upper-bound. The quadratically-bounded error can be used by a robust controller to maneuver
Mariner Venus 67 guidance and control system
Subsystems of Mariner Venus 67 spacecraft guidance and control system
Guidance and control technology for manned planetary missions.
Manned spacecraft guidance and control technology from Mercury, Gemini and Apollo programs, including hardware, software, man machine systems, etc
Orbital testing requirements for guidance and control devices, volume I
Orbital testing requirements for spacecraft guidance, navigation and control systems, and components
Guidance and control aspects of abort from manned spacecraft
Manned spacecraft abort guidance and control problems, discussing various modes and emergency conditions
Spacecraft guidance, navigation, and control requirements for an intelligent plug-n-play avionics (PAPA) architecture
The objective of this research is to design an intelligent plug-n-play avionics system that provides a reconfigurable platform for supporting the guidance, navigation and control (GN&C) requirements for different elements of the space exploration mission. The focus of this study is to look at the specific requirements for a spacecraft that needs to go from earth to moon and back. In this regard we will identify the different GN&C problems in various phases of flight that need to be addressed for designing such a plug-n-play avionics system. The Apollo and the Space Shuttle programs provide rich literature in terms of understanding some of the general GN&C requirements for a space vehicle. The relevant literature is reviewed which helps in narrowing down the different GN&C algorithms that need to be supported along with their individual requirements.
A survey of spacecraft formation flying guidance and control (part I): guidance
This paper provides a comprehensive survey of spacecraft formation flying guidance (FTG). Here by the term guidance we mean both path planning and optimal, open loop control design.
Implementation of Autonomous GPS Guidance and Control for Spacecraft Formation Flying
This paper presents the general relative orbit dynamics equations and GPS (Global Positioning System) orbit observational equations that have been developed for on-board control of spacecraft flying in formation. The approach to the implementation of the autonomous control for orbit acquisition and maintenance of spacecraft formation using GPS code pseudoranges are presented. As a practical application of the models and method provided in this paper, the orbit control of the Earth-Orbiter 1(EO-1) / Landsat 7 system has been designed, using the discrete-time linear optimal output feedback control. For the actuator of the on/off type reaction jets, the implementation problem of the pulse-amplitude modulation is also studied. Simulation results of autonomous orbit control and maintenance, for 3-dimensional initial orbit error, using optimal output feedback control are shown. These simulation results certified the feasibility of the implementation of the autonomous maintenance control for EO-1/Landsat 7 formation flying by means of the discrete-time linear optimal output feedback control.
Spacecraft Guidance, Navigation, and Control Interface Standards Initiative : Progress to Date
Explore the source record for details and available documents.
Man-machine design for the Apollo navigation, guidance, and control system.
Man-machine design for Apollo spacecraft navigation, guidance and control systems
Some theoretical considerations arising in guidance analysis.
Optimal control and estimation theory application to space navigation, noting random disturbance
A survey of spacecraft formation flying guidance and control (Part II): control
This paper provides a comprehensive survey of spacecraft formation flying control, which encompasses design techniques and stability results for these coupled-state control laws.
LEM piloted control considerations.
LEM mission and pilot role in spacecraft control including guidance and control systems, retromaneuvering, landing-site inspection, etc
A direct and analytical solution for space flight guidance functions.
Direct and analytical solution of polynomial-type guidance functions for optimal space flight