Electric Propulsion for Pristine Microgravity in Low Earth Orbit

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Solution Overview

Problem

Existing solutions for achieving microgravity in low earth orbit (LEO) produce deficient environments that hinder the full utilization of microgravity for commercial activities such as manufacturing and biomedical research.

Innovation Solution

Utilizing long-duration, low thrust electric thrusters, particularly solar electric thrusters, to provide continuous thrust to counteract drag forces in LEO, maintaining a quasi-steady acceleration of less than 1.0 μg within a pressurized space vehicle for extended periods, thereby creating a pristine microgravity environment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing propulsion systems are used to maintain orbit in LEO, then orbital stability is achieved, but microgravity quality deteriorates due to vibrations and acceleration disturbances

Engineering Contradiction:

Improveorbital stabilityVSAvoidmicrogravity quality

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces traditional mechanical propulsion systems with an electric propulsion system that uses electromagnetic fields to accelerate ions, eliminating mechanical vibrations and improving microgravity quality while maintaining orbital stability

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the operational parameters by using continuous low-thrust electric propulsion instead of periodic high-thrust mechanical propulsion, maintaining a quasi-steady acceleration less than 1.0 μg to preserve microgravity conditions

Inventive Principle:

Principle #35Parameter changes

2Object-affected harmful factors

If continuous electric propulsion is used to maintain microgravity, then microgravity quality improves, but propellant consumption increases

Engineering Contradiction:

Improvemicrogravity qualityVSAvoidpropellant consumption

Core Design Contradiction:

Object-affected harmful factorsVSLoss of substance

Solution Approach 1:

The patent changes the thrust parameter from high intermittent thrust to continuous low thrust, operating at a quasi-steady acceleration less than 1.0 μg, which reduces peak propellant consumption while maintaining microgravity quality

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements continuous electric propulsion operation to maintain orbital position and microgravity conditions, replacing periodic mechanical boosts with steady electromagnetic thrust that is more efficient over long durations

Inventive Principle:

Principle #20Continuity of useful action

3Productivity

If long-duration microgravity experiments are conducted, then research productivity improves, but maintaining the microgravity environment becomes more difficult

Engineering Contradiction:

Improveresearch productivityVSAvoidpropulsion system complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical propulsion systems with electric propulsion that has fewer moving parts and requires less maintenance, enabling long-duration operation without increasing system complexity

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The electric propulsion system automatically maintains the required quasi-steady acceleration less than 1.0 μg through continuous operation, reducing the need for manual intervention and complex control mechanisms during long-duration experiments

Inventive Principle:

Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system achieves sustained, high-quality microgravity conditions, allowing for prolonged research and experimentation by minimizing vibrations and accelerations, enabling applications like semiconductor manufacturing and other sensitive processes that require pristine microgravity.

Implementation Method 1

A plurality of electric propulsion thrusters configured to collectively generate a thrust force in a forward direction continuously

Methodology Applied

Scientific EffectElectromagnetic propulsion: Electromagnetic Propulsion

Implementation Method 2

A solar array configured to generate electrical energy for use by the solar electric propulsion system

Methodology Applied

Scientific EffectPhotovoltaic effect: Photovoltaic Effect

Implementation Method 3

A drag force acts on the space vehicle in an aft direction opposite the forward direction when the space vehicle travels in LEO

Methodology Applied

Scientific EffectAtmospheric drag: Drag

Data Source

PatentUS12589892B1Microgravity in low earth orbit with continuous electric propulsion

Publication Date: 2026.03.31 BLUE ORIGIN MANUFACTURING LLC

AI summary

Systems and methods for achieving pristine microgravity in low earth orbit (LEO) using electric propulsion. Long-duration, low thrust, electric thrusters provide a constant thrust force for a pristine microgravity environment within a given volume of a space vehicle experiencing drag forces in LEO. Large space vehicles in LEO configured to be pressurized for human habitation, for instance having a mass of at least 40,000 kg and an internal volume of at least 400 m3, can use the electric propulsion systems and methods to achieve a quasi-steady acceleration less than or equal to 1.0 μg for durations of 180 consecutive days or longer.