More Filters. Multimode propulsion is the integration of two or more propulsive modes into a single spacecraft propulsion system. In a multimode propulsion system, the key attribute is shared propellant between … Expand. Review of multimode space propulsion. Development of a microthrust balance and ion beam measurement system: Characterizing a dual-mode thruster for spacecraft. Abstract There is a rapid progression toward spacecraft miniaturization due to the prospect of reduced launch costs, the requirement for satellite constellations, and the integration of … Expand.
Linear burn rate of green ionic liquid multimode monopropellant. Combustion and Flame. Abstract Multimode space propulsion systems are being proposed that integrate high specific impulse electric propulsion and high thrust chemical propulsion. The most important attribute of this … Expand. Multimode microthrusters are capable of both high specific impulse electrical operation and high thrust chemical operation, allowing a high degree of mission flexibility for small satellites.
This … Expand. View 2 excerpts, cites methods. A novel geometry of electrospray emitter has been developed for achieving dual-mode propulsion. The hybrid emitter consists of a capillary emitter with a protruding, coaxial needle. This design takes … Expand.
Development of a steady-state microthrust measurement stand for microspacecrafts. Abstract A null-displacement thrust stand based on torsional pendulum configuration has been developed to characterize the steady-state microthrust for microspacecrafts. A pair of elastic transducers … Expand. Proceedings of the IEEE. View 1 excerpt, cites background. The second section provides an overview of the ground segment and operations, and the third section focuses on the regulations, policies, economics, and future trends.
Key features: Payloads for nanosatellites Nanosatellites components design Examines the cost of development of nanosatellites. Covers the latest policies and regulations. Considers future trends for nanosatellites. Nanosatellites: Space and Ground Technologies, Operations and Economics is a comprehensive reference for researchers and practitioners working with nanosatellites in the aerospace industry.
The Space Microsystem developed by the author is systematically introduced in this book, providing information on such topics as MEMS micro-magnetometers, MIMUs Micro-inertia-measurement unit , micro-sun sensors, micro-star sensors, micro-propellers, micro-relays, etc. Covers various reasoning and diverse applications for small satellites in both technical and regulatory aspects Represents the first publication that systematically introduces the Space Microsystem developed by the author Examines new technical standards, removal techniques and other methods that might help to address current problems, regulatory issues and procedures.
Accordingly, interest has also grown in designing micropropulsion systems to increase the lifespan of these satellites. This work describes the framework for analyzing the effects of imperfect attitude determination and control when quantifying the on-orbit performance of a micropropulsion system. The Gauss variation of parameters equations were implemented to model the orbital mechanics, with perturbing models for the zonal harmonics, atmospheric drag, and solar radiation pressure included.
Two common sources for imperfections in a spacecraft's attitude were considered. The first was to consider the effect of the spacecraft having poor pointing, done by varying the direction of the thrust due to attitude control errors. The second was to consider the effects of the accuracy of the attitude determination method, by incorporating sensor noise to the magnetometer and the Sun sensors used in the Quaternion Estimator QUEST algorithm"--Abstract, page iii.
Micromanufacturing and Nanotechnology is an emerging technological infrastructure and process that involves manufacturing of products and systems at the micro and nano scale levels. Development of micro and nano scale products and systems are underway due to the reason that they are faster, accurate and less expensive. Moreover, the basic functional units of such systems possesses remarkable mechanical, electronic and chemical properties compared to the macro-scale counterparts.
Since this infrastructure has already become the prefered choice for the design and development of next generation products and systems it is now necessary to disseminate the conceptual and practical phenomenological know-how in a broader context. This book incorporates a selection of research and development papers.
Its scope is the history and background, underlynig design methodology, application domains and recent developments. This title analyzes distributed Earth observation missions from different perspectives. In particular, the issues arising when the payloads are distributed on different satellites are considered from both the theoretical and practical points of view. Moreover, the problems of designing, measuring, and controlling relative trajectories are thoroughly presented in relation to theory and applicable technologies.
Then, the technological challenges to design satellites able to support such missions are tackled. The aerospace industry is shifting towards green and nontoxic propulsion systems, so water could be used as an effective propellant, considering its relatively high mass density and low molecular mass.
New microelectromechanical systems MEMS technologies show promising opportunities for the integration of miniaturized propulsion systems, due to their versatility and robustness. In this thesis, a comparative study of nozzle flow, heat transfer, and thermodynamics in two different thrusters is conducted.
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