Refine Your Search

Topic

Author

Affiliation

Search Results

Technical Paper

Propellant Expulsion in Unmanned Spacecraft

1964-01-01
640792
A detailed account of the development and use of bladders in Ranger and Mariner spacecraft is presented. The final section describes an advanced development program aimed at providing technology for future spacecraft. ...The final section describes an advanced development program aimed at providing technology for future spacecraft.
Technical Paper

Manned Spacecraft Structure Versus Unmanned Spacecraft Structure

1966-02-01
660672
The large difference between the total numbers of manned and unmanned spacecraft and their respective missions is discussed. The environmental and functional requirements having different effects on the two spacecraft types are described. ...The environmental and functional requirements having different effects on the two spacecraft types are described. The materials characteristics involved in those requirements and the resulting typical configurations are reviewed. ...It is concluded that vibration and pressurized gas containment have the outstanding influence on spacecraft structural systems. It is noted that new structural factors of safety have not been derived on the basis of any rational consideration of the design conditions for stability or pressure critical structure.
Article

JAXA launches HTV7 unmanned cargo spacecraft on resupply mission to ISS

2018-09-25
The Japan Aerospace Exploration Agency (JAXA) H-IIB Launch Vehicle No. 7 lifted off from the Tanegashima Space Center in Japan at 2:54:27 Japan Standard Time (JST) on September 23, carrying the KOUNOTORI7 (HTV7) cargo transporter into orbit to start its journey to the International Space Station (ISS).
Technical Paper

Medical Cargo Delivery using Blockchain Enabled Unmanned Aircraft Systems

2022-05-26
2022-26-0003
Significant growth of Unmanned Aerial Vehicles (UAV) has unlocked many services and applications opportunities in the healthcare sector. ...Aerial transportation of medical cargo delivery can be an effective and alternative way to ground-based transport systems in times of emergency. ...In this paper, we present a blockchain network solution based on Ethereum for the transportation of medical cargo such as blood, medicines, vaccines, etc. The smart contract solution developed in solidity language was tested using the Truffle program.
Technical Paper

Thermal Scale Modeling of Spacecraft

1969-02-01
690196
Several research programs which have applied thermal scale modeling to a radiation-conduction heat transfer system (unmanned spacecraft) and to a radiation-conduction-convection heat transfer system (manned spacecraft) are reviewed and evaluated. ...The utilization of scaled models in the development of spacecraft thermal control systems is discussed. The criteria necessary to establish thermal similitude are developed as well as techniques for designing scaled thermal models.
Technical Paper

Apollo Spacecraft Propulsion Systems

1969-02-01
690704
The Apollo spacecraft has 50 rocket engines arranged in 7 separate and independent systems. During a single mission there are approximately 100,000 rocket engine firings. ...These crew safety requirements impose many unusual constraints that are not required in launch vehicle or unmanned propulsion system designs. These requirements and their effects on design and operation are discussed and the systems operational experience on Apollo models are presented.
Technical Paper

Design Criteria for Spacecraft Fluid Mechanical Systems

1970-02-01
700781
Elements of fluid and mechanical systems in manned and unmanned spacecraft are discussed, and additional visibility is provided for those design requirements that differ from earth-oriented vehicles. ...This paper emphasizes the requirements peculiar to spacecraft fluid mechanical systems. Although the design requirements for the fluid power systems used in aircraft, tactical missiles, and launch vehicles have been established successfully, criteria for the design of gaseous and liquid systems in spacecraft demand additional considerations. ...Although the design requirements for the fluid power systems used in aircraft, tactical missiles, and launch vehicles have been established successfully, criteria for the design of gaseous and liquid systems in spacecraft demand additional considerations. Elements of fluid and mechanical systems in manned and unmanned spacecraft are discussed, and additional visibility is provided for those design requirements that differ from earth-oriented vehicles.
Technical Paper

Flight Experience with Apollo Spacecraft Propulsion Systems

1973-02-01
730941
Seven hundred and sixty-three spacecraft rocket engines were flown in the program. Over 6 h of manned rocket flights were logged by the spacecraft propulsion systems and approximately one million rocket engine firings were made. ...Over 6 h of manned rocket flights were logged by the spacecraft propulsion systems and approximately one million rocket engine firings were made. One engine failure was encountered on an early unmanned flight as a result of a failure in the guidance programmer which caused the engine to operate in a manner known to cause failures. ...One engine failure was encountered on an early unmanned flight as a result of a failure in the guidance programmer which caused the engine to operate in a manner known to cause failures.
Technical Paper

Operational Entry Spacecraft Using Airbreathing Propulsion

1968-02-01
680369
The application of air breathing turbofan engines to a variable geometry, lifting, entry spacecraft provides a Cruise-spacecraft having increased operational flexibility. This spacecraft can accomplish a high performance, 3000 nautical mile lateral range mission, by combining the glide available from its medium hypersonic L/D (1. 7 to 2. 3) with subsonic cruise in the atmosphere. ...In this application, it excels low L/D spacecraft requiring orbit maneuvers to enhance lateral range. It is competitive with high L/D spacecraft while avoiding some of their advanced aerodynamic and thermal protection system technologies. ...It is competitive with high L/D spacecraft while avoiding some of their advanced aerodynamic and thermal protection system technologies.
Technical Paper

CPHTS Hardware Development for the EOS AM Spacecraft Instruments

1993-07-01
932239
NASA's Earth Observing System (EOS) Program will place a series of unmanned polar-orbiting spacecraft in low-earth orbit to support a variety of scientific and Earth-observing missions. ...The EOS AM spacecraft has a requirement for an advanced heat transportation system for thermal energy. A Capillary Pumped Heat Transportation System (CPHTS) using Capillary Pumped Loop (CPL) technology was selected to accommodate the instruments requiring advanced heat transport.
Technical Paper

Archiving Trace Organic Contaminants in Spacecraft Water

2003-07-07
2003-01-2408
One of the long-standing concerns in space exploration is the presence of trace organic contaminants in recycled spacecraft water supplies. At present, water samples on the International Space Station (ISS) are collected at regular intervals, stored in Teflon™-lined containers, and returned to Earth for characterization. ...Second, the archived water consumes valuable cargo space in returning Shuttle and Soyuz vehicles. Third, the organic contaminants present in the collected samples may degrade upon extended storage. ...With SPE, the organic contaminants in the spacecraft water can be trapped and concentrated on a thin membrane or other extraction medium, with the resulting effluent recycled back into the water supply as opposed to being stored and returned to Earth.
Technical Paper

Gemini Flight Control System Performance during the Second Unmanned Flight

1965-02-01
650595
The second Gemini flight provided the first opportunity to evaluate the spacecraft flight system performance in its actual operational environment. The post-flight evaluation proved the adequacy of the system and removed one of the constraints on the subsequent manned flights. ...The flight control system is briefly described as are the special measures taken to permit operation in an unmanned configuration. The maneuvers required of the system during the mission are described as are the data and analysis procedures utilized.
Standard

Spacecraft Thermal Balance

2011-07-25
CURRENT
AIR1168/12A
In the design of spacecraft, heat transfer becomes a criterion of operation to maintain structural and equipment integrity over long periods of time. ...In the design of spacecraft, heat transfer becomes a criterion of operation to maintain structural and equipment integrity over long periods of time. The spacecraft thermal balance between cold space and solar, planetary, and equipment heat sources is the means by which the desired range of equipment and structural temperatures are obtained. ...With the total spacecraft balance set, subsystem and component temperatures can be analyzed for their corresponding thermal requirements.
Standard

Architecture Framework for Unmanned Systems

2018-08-23
CURRENT
AIR5665B
The Capabilities View uses terms and concepts from the Conceptual View to describe capabilities of unmanned systems and of other entities in the unmanned systems domain. The Interoperability View provides guidance on how to design and develop systems in a way that supports interoperability. ...This SAE Aerospace Information Report (AIR) describes the Architecture Framework for Unmanned Systems (AFUS). AFUS comprises a Conceptual View, a Capabilities View, and an Interoperability View. ...The Conceptual View provides definitions and background for key terms and concepts used in the unmanned systems domain. The Capabilities View uses terms and concepts from the Conceptual View to describe capabilities of unmanned systems and of other entities in the unmanned systems domain.
Standard

Cargo Stopper Devices

2022-10-13
CURRENT
AS6554A
The purpose of this SAE Aerospace Standard (AS) is to standardize the basic design, performance, and testing requirements for “Cargo Stoppers” cargo tie-down accessories to be used in conjunction with approved restraint straps meeting AS5385C (TSO C-172) requirements.
SAE MOBILUS Subscription

Unmanned Vehicles

2011-02-15
The Unmanned Vehicle subscription contains the complete set of SAE Standards on Joint Architecture for Unmanned Systems (JAUS), which specify data formats and protocols that are beneficial for research, development, design acquisition, and deployment of unmanned systems. ...The Unmanned Vehicle subscription contains the complete set of SAE Standards on Joint Architecture for Unmanned Systems (JAUS), which specify data formats and protocols that are beneficial for research, development, design acquisition, and deployment of unmanned systems. ...The Unmanned Vehicle subscription contains the complete set of SAE Standards on Joint Architecture for Unmanned Systems (JAUS), which specify data formats and protocols that are beneficial for research, development, design acquisition, and deployment of unmanned systems. The standards in this resource include: JAUS History and Domain Model Architecture Framework for Unmanned Systems JAUS Compliance and Interoperability Policy JAUS Service Sets JAUS Service Interface Definition Language with ASCII Files JAUS/SDP Transport Specifications
X