Study of Dust Detection System on a Micro Satellite Space Systems Dynamics Laboratory M2 Kyohei Nakashima.

Slides:

Advertisements

Similar presentations

Objects in space orbit other objects because of the gravitational force between them When the comet is far away from the Sun the gravitational force is.

Advertisements

Chapter 5 Projectile Motion and Satellites. Projectile Motion Describe the motion of an object in TWO dimensions Describe the motion of an object in TWO.

Chapter 8 The Sun – Our Star.

Earth’s Atmospheric Layers. Troposphere Distance above sea level: 0-16 km Average Temperature: -64º to 134º F Warm air rises to form clouds, rain falls.

The Solar Corona and Solar Wind Steven R. Cranmer Harvard-Smithsonian Center for Astrophysics.

A Strange Phenomenon There is a type of unstable particles called Muon. They are produced in the upper atmosphere 14 km above Earth’s surface and travel.

ENERGY FROM THE SUN Chapter 14.3 Pages Energy in the Atmosphere The sun is the source of ALL energy in our atmosphere. Three things that can.

Satellites What keeps them in orbit?. Satellites A satellite is any projectile given a large enough velocity so its path follows the curvature of the.

THE OPTIMAL STRUCTURAL DESIGN OF QSAT FM (Flight Model)

The Dangers of Solar Storms and Solar Cycles.  For every 1 million atoms of hydrogen in the entire sun  98,000 atoms of helium  850 of oxygen  360.

Part 4: A Special Star: Our Sun 1.  Our Dynamic Sun From NASA’s Video Gallery 2.

Gravity. Law of Universal Gravitation The force of gravity applies to everything in the universe The force of gravity applies to everything in the universe.

The Sun Earth Science - Mr. Gallagher. The Sun is the Earth's nearest star. Similar to most typical stars, it is a large ball of hot electrically charged.

Warm-up In Your Journal- What is the purpose of the atmosphere? Essential Question- Why does the Earth need an atmosphere? Does it cause any problems?

The Sun Our Nearest Star. The Source of the Sun’s Energy The Source of the Sun’s Energy Fusion of light elements into heavier elements. Hydrogen converts.

Chapter 7: Atmosphere and Climate.

What keeps them in orbit?

Weather Factors Chapter 16.

Special relativity.

Projectiles Horizontal Projection Horizontally: Vertically: Vertical acceleration g  9.8 To investigate the motion of a projectile, its horizontal and.

Earth’s Atmospheric Layers. Troposphere Distance above sea level: 0-16 km Average Temperature: -50º to 70º F All weather happens here. Warm air rises.

Chapter 3: Gravity, Friction, and Pressure 12.1 Gravity is a force exerted by masses 12.2 Friction is a force that opposes motion 12.3 Pressure depends.

Magnetic Forces. * Current-carrying wires have magnetic fields and… * Magnets exert forces on other magnets. Therefore… Magnets exert forces on current-carrying.

Stars Physics Astrophysics. Brightness Different brightness. Different color. How bright are they really? What is due to distance? What is due.

Earth’s Atmosphere The Earth is surrounded by a blanket of air called the atmosphere. It extends over 372 miles (560 kilometers) from the surface of Earth.

The Dangers of Solar Storms and Solar Cycles.  Radius = 696,000 km  Mass = 2E30 kg  Luminosity = 3.8E26 W  Rotation Rate  25 days at the equator.

Meteoroid and debris models and tools in SPENVIS H. Ludwig D. Heynderickx BIRA, Ringlaan 3, B-1180 Brussel, Belgium.

Space for Reflection Questions with (H) are higher content only the other questions are both foundation and higher.

1. Name one part of the sun. 2. Is the sun a solid, liquid or gas? 3. How hot was the center of the sun when it officially became a star?

Chapter-3 Falling Objects and Projectile Motion

Motion in One Direction Chapter 2 Goals: motion, displacement, velocity, acceleration, freefall, acceleration due to gravity and equations to solve for.

Proportionality between the velocity V and radius r

Chapter-3 Falling Objects and Projectile Motion Outline: Acceleration due to gravity Falling object Projectile motion Overview: Explore how objects move.

Gravity Physical Science Section 3.2. Gravity All objects have a gravitational attraction for all other objects Law of Gravitation- Any two masses exert.

The Atmosphere: Structure and Temperature

9/12/14 Aim: What is the difference between an observation and an inference? Do Now: Pretend you are Christopher Columbus trying to get funding for your.

Layers of the Atmosphere

1 Grades 6-8: Introduction. 2 Aerospace Technology Space Science Human Exploration And Development Of Space Earth Science Main Areas Of Research.

Our Star The Sun C. Alex Young NASA Goddard Space Flight Center July 21, 2006 NASA GSFC Visitor’s Center.

Special Relativity Physics 12 Adv. Einstein’s Postulates  In 1905, while working as a patent clerk in Switzerland, Einstein published his paper on.

Gravity and Motion Chapter 2 Section 1 notes. Objective  Students will be able to describe the effect of gravity and air resistance on falling objects.

Forces in Motion What Do You Think? How does the force of gravity affect falling objects?

What is a geomagnetic storm? A very efficient exchange of energy from the solar wind into the space environment surrounding Earth; These storms result.

Energy Budget The amount of energy arriving at the Earth and leaving the Earth must be in balance. If more energy arrives than leaves, the Earth will warm.

Gravity Part 2. Review Acceleration: the rate at which velocity changes Acceleration rate of gravity: 9.8 m/s/s.

Emitters of radiation White/sil ver surfaces emit less thermal radiation. Polar bears are white so they emit less thermal radiation. Keywords: Conduction,

1 The law of gravitation can be written in a vector notation (9.1) Although this law applies strictly to particles, it can be also used to real bodies.

Digging Deeper 5 The Sun and its Effects. Structure of the Sun Like the Earth, the Sun has many layers.

Thermal Energy 11/1/2011. What is thermal energy? Thermal energy is also known as heat and is the kinetic energy of all the molecules in a material. If.

June 2013 Acoustic Emission as Toll for Identifying the Drill Position in Fiber Reinforced Plastic and Aluminum Stack Dr. Uri Ben-Hanan, ORT Braude College,

Chapter 6 Forces and Motion Section 1 Gravity and Motion.

2016 Solar Storms with NASA/NOAA GOES-R Satellite Primed to Support Space Weather Predictive Capabilities On 20 December 2016 Earth encountered a stream.

Chapter 12 Section 2 Gravity Objectives

Do Now Heading: Projectile Motion and Ramps

Atmosphere & Weather Review

NASA Nasa's Parker Solar Probe mission set off to explore the Sun's atmosphere in the summer of The probe will swoop to within 4 million miles of.

שעה על לוויינים Fiber-optic club Jan 08.

Projectile Motion Describe the motion of an object in TWO dimensions

List 5 things that you know about waves.

Chapter-3 Falling Objects and Projectile Motion

The Atmosphere.

Motion in One Dimension

9. Gravitation 9.1. Newton’s law of gravitation

Grades 9-12: Introduction

Projectile Motion Describe the motion of an object in TWO dimensions

Heat Transfers.

Weather Dynamics Outcomes:

By: CAEDEN , CORnbud , DYLAN

CORONAL MASS EJECTIONS

Presentation transcript:

Study of Dust Detection System on a Micro Satellite Space Systems Dynamics Laboratory M2 Kyohei Nakashima

2 Contents Objective Background Dust Detection System Acoustic Emission Method Experiments Results Conclusions

3 Objective Analysis and verification of dust detection system on a micro satellite using Acoustic Emission sensors

4 Background Space weather forecast is necessary because space disasters threaten human space activities. Space disasters Magnetic storm High energy particles radiation Space debris Sun flares Space debris Radiation Earth Magnetic storm

5 Dust Detection System Observation of surfaces of spacecrafts recovered Example: LDEF (Long Duration Exposure Facility,), EURECA (European Retrievable Carrier ), SFU (Space Flyer Unit) G. Drolshagen, ESA/TOS-EMA 21th IADC, March 2003, Bangalore, India High cost Low Earth Orbit only

6 Acoustic Emission Method Acoustic Emission (AE) is an elastic wave motion phenomenon in a solid. AE occurs when an impact happens on a solid or when destruction happens in a solid. Impact destruction

7 Acoustic Emission Method Impact position can be detected by solving the following equations. S(x, y, z): Impact position T i (a i, b i, c i ): i th AE sensor position v e : Wave velocity t i : Arrival time of a wave at i th AE sensor z x y S (x, y, z) T 0 (a 0, b 0, c 0 ) T 1 (a 1, b 1, c 1 ) T i (a i, b i, c i ) T N (a N, b N, c N )

8 Experiments Two experiments were performed by free fall. a light gas gun. Experiments by free fall are in preparation for impacts by a gas gun. Experiments by a gas gun are representative of impacts in space.

9 Experiments Free fall type of panel dimensions （ mm) projectile Aluminum alloy panel （ A 5052 ） 150×160×5 A 2017 φ1 mm 1.4 mg CFRP layered panel （ 0/90 ， 4 ply ） 150×150×0.8 Aluminum honeycomb sandwich panel150×150×12 Aluminum honeycomb sandwich panel with CFRP face sheets150×150× different types of panel and 1 type of projectile were used in free fall. Projectiles were dropped from 380 mm above position of panels. Impact velocity was about 2.7 m/s.

10 Experiments Results of experiments by free fall Aluminum alloy panelCFRP layered panel

11 Experiments Results of experiments by free fall Aluminum honeycomb sandwich panel Aluminum honeycomb sandwich panel with CFRP face sheets

12 Experiments Gas gun type of panel dimensions （ mm) projectile Aluminum alloy panel （ A 5052 ） 400×200×5 A 2017 φ3.175 mm 45 mg CFRP layered panel （ 0/90 ， 4 ply ） 400×200×0.8 Aluminum honeycomb sandwich panel400×200×12 Aluminum honeycomb sandwich panel with CFRP face sheets400×200× different types of panel and 1 type of projectile were used in a gas gun. Impact velocity was about m/s. Vacuum level was about 1.0*10 3 Pa

13 Experiments Results of experiments by a gas gun Aluminum alloy panelCFRP layered panel

14 Experiments Results of experiments by a gas gun Aluminum honeycomb sandwich panel Aluminum honeycomb sandwich panel with CFRP face sheets

15 Results compared real impact position with predicted impact position on experiments by free fall Real Impact PositionCalculated Impact PositionErrors x(mm)y(mm)x(mm)y(mm)Δx(mm)Δy(mm) Aluminum alloy panel Average of errors Standard deviation4.51.4

16 Results compared real impact position with predicted impact position on experiments by free fall Real Impact PositionCalculated Impact PositionErrors x(mm)y(mm)x(mm)y(mm)Δx(mm)Δy(mm) CFRP layered panel Average of errors Standard deviation5.63.1

17 Results compared real impact position with predicted impact position on experiments by free fall Real Impact PositionCalculated Impact PositionErrors x(mm)y(mm)x(mm)y(mm)Δx(mm)Δy(mm) Aluminum honeycomb sandwich panel Average of errors Standard deviation4.83.3

18 Results compared real impact position with predicted impact position on experiments by free fall Real Impact PositionCalculated Impact PositionErrors x(mm)y(mm)x(mm)y(mm)Δx(mm)Δy(mm) Aluminum honeycomb sandwich panel with CFRP face sheets Average of errors Standard deviation3.72.6

19 Results Compared real impact position with predicted impact position on experiments by a gas gun Real Impact PositionPredicted Impact PositionErrors x(mm)y(mm)x(mm)y(mm)Δx(mm)Δy(mm) Real Impact PositionPredicted Impact PositionErrors x(mm)y(mm)x(mm)y(mm)Δx(mm)Δy(mm) Aluminum alloy panel CFRP layered panel Average of Errors Average of Errors

20 Results Compared real impact position with predicted impact position on experiments by a gas gun Real Impact PositionPredicted Impact PositionErrors x(mm)y(mm)x(mm)y(mm)Δx(mm)Δy(mm) Real Impact PositionPredicted Impact PositionErrors x(mm)y(mm)x(mm)y(mm)Δx(mm)Δy(mm) Aluminum honeycomb sandwich panel Aluminum honeycomb sandwich panel with CFRP face sheets Average of Errors

21 Results Aluminum alloy panel Error- 5.7 % of the distance of sensors CFRP layered panel Error- 8.4 % of the distance of sensors Aluminum honeycomb sandwich panel Error- 5.7 % of the distance of sensors Aluminum honeycomb sandwich panel with CFRP face sheets Error- 7.6 % of the distance of sensors

22 Conclusions Dust detection system is possible by using AE sensors. It is more difficult to decide the arrival time accurately in panels using CFRP and honeycomb sandwich. Buffers are needed to relieve the impacts to AE sensors. There are little influence of holes by impacts to detect the impact points.