DIGITAL DESIGN + FABRICATION SM1, 2015 M1 JOURNAL - IDEATION

FENG CHAO596539

Ms Michelle Emma James TUTORIAL GROUP 6

2

Measured Drawings

1000

mm

380mm

45*

580mm 220mm

370mm

5*

35*

PLAN ELEVATION WITH RE-TACTED UNBRELLA

SECTION1:10

I completed the measured drawing of the umbrella using a few methods.

The dimensional measurement is done using a measur-ing tape. This gives me the extended height of the umbrella 580mm and the width of the deployed umbrella 1000mm. As the umbrella has 8 extension arms, the angle between each arm would be 45°. This creates a shadow area of 850903mm².

The angle of which the arms are deployed in elevation view is calculated via simple trigonometry. An umbrella is first striped down into its basic components, ie the arms, the telescop-ing shaft and the canopy. A photograph of the extended umbrella is taken and then printed on a piece of paper. Us-ing actual measured length and extrapolation of ratio, an-gles of fully deployed arms are calculated. This angle is cross checked with physical measurement using a protractor.

SECTION

180mm

98mm

95mm

190mm

220mm

UNMBRELLA ARM MEASUREMENT

Ratio 1:1

4

Analysis

There are two important components to the umbrella.

First are the collapsible arms. This mechanism trans-forms vertical movement into horizontal movement via a series of pins. As users push the hub upwards along the vertical shaft, compression occurs at the fixed end of the arm. This in turn creates rotational forces at respective pins and extends the arm out-wards. Such basic transmission of forces, from user to umbrella, from vertical to horizontal, should be noted.

Second part is the telescopic shaft. The shafts are hollow tubes where one shaft is smaller than it other as they extend upwards. Thus, smaller shafts can be hidden in larger shaft, reducing the um-brella’s length when unused. This idea of hiding in plain sight is something which makes the compact umbrella interesting as such telescopic mecha-nism have also used in magic performances. TELESCOPIC UNBRELLA SHAFT

FULLY COLLPAED ARM

FULLY EXTENDED ARM

ARM MECHANISMS

Relationship between skin and skelelton

When the arms are collapsed, the umbrella mem-brane loses tension. When the arms are extended, the effect is vice versa.

It has also been observed that there are only 3 anchor/contact points between the arm and the membrane. These connection points are located at joints of the arms.

Anchor ponits

Collapsed Arm

Extended Arm

Unbrella membrane

Unbrella membrane

6

Digital Model

Rhino Generated Plan, Elevation And Isometic View Rhino Model Details

Underside of the unmbrella

Intersection of compo-nents

Joints detailsOverview

Rhino Moedling Porcess

Step 1

A bitmap of the measured arm draw-ings was first place on the modeling space and traced accurately.

Step 2

Using 1 Rail Sweep and 2 Rail Sweep commands arm surface was created. Using offset, thickness of was created.

Step 4

Using Polar Array commands, multiple arms was created.

Step 3

Using Revolve comman, volume of shaft was created.

Step 5

Umbrella canopy surface was created via a network of curves and polar ar-ray.

8

Sketch ModelSketch Model Concepts

Several concpets from the unbrella analysis have been brought to the sketch model.

First, comes the idea of movable arm which is able to trasnfer the direction of force.

Second, is the concept of hidding volume in plain sight (the tele-scopic shaft).

Last is the relation and connection between the physcially hard arms and the soft flexible surface (umbrella skeleton and cano-py).

1.Changing direction of force.

When downward force is applied, the canopy expands and gains volume. Users does not need to have physically contact the membrane to expand the structrue’s volume. This concept can be applied to personal space where one might find pushing someone away as uncivilised.

2. Hidding volume at plain sight

When the plastic sheet is collapsed, it hides in the horizontal plane and when it is needed, it expands upwards. This concept of hid-ing can be applied to personal space: how can we hide one’s own personal zone so that others people can come closer.

3. Contact points

The contact points between the plastic sheets and the wooden arms are at the joints. Its is not a full surface contact/anchor but a point contact between these two materials. Personal space also have similar ‘contact points’, which determines ones rela-tionship with another.

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Sketch Design #1

The first idea is to build a series of reflective panels around the subject. Through a series of joints and springs, the panels can be deployed (vertical) and retract (horzontal) as needed. The reflective surface (one way mirror) acts like second skin for the user while the mechensim is the skeleton. The curved surface re-flects surrounding envrionemnt around user.

Plan Elevation

Isometric Mechenism

Idea: Making people come closer

Response to presonal space

Among all personal space distances, one feels most comfortable and familiar with one’s own skin and image. By using a series of reflective surfaces, strang-ers will come out of their own personal zone and enter my personal zone with-out them realising. This is becase they will only see their image when they look at me (refelction panel deployed) and hence feels more comfortable to ap-proch. When they come close enough, the reflective panels will be retracted, breching conventional expectation personal space distacne with a stanger.(Hidding at plain sight, Contact points)

Sketch Design #2

Idea: Protecting own personal space

A network of skeleton mechanism which can expand can be created. The tip of the joints are connected by a network of strings. When the skeleton ex-pands, the strings connected to the joints tightens and a volume is created and defined. When retracted, the skeleton collape and the strings lose tension.

Isometric Elevation

Plan Mechensim

Response to presonal space

It is a simple concept making one’s own personal space highly visible to others and clearly define the distance of one’s personal space preference. As per-sonal space have much ambiguity, differed by gernder, culturem personality, status, social perception etc, physically drawing out boundaries can help to possess the space. The expandable skeleton can flexibly change the amount of perosnal space needed from time-to-time.(Volume)

12

Sketch Design #3

Idea: Privatisng perosnal space

This idea is about rethinking the way we think about personal space. It is not the immidiate space which one is surrouned by by the negative of it. The is materialied by extending the frame and capsule beyond ones personal space to encroach on that of others. This prevents them from intruding upon or even approaching one’s own. This system focuses on defending personal space by possesing more space and making them personal. (Volume, Contact Point)

This idea involves an extended capsule arm which extends beyond ones per-sonal space. The arm is controlled by a series of joints and levers where the user can clam the jaws. The exterior of the jaws are wraped with tranparent sheet, the capsules volumes.

Plan: Closed capsule Plan: Opened capsule

Isometic: Clamping Elevation

Response to presonal space

Military signal jammer expands space need for ‘private communication’.

Appendix

Sources:

Mirror Reflectionhttp://blog.viewbug.com/wp-content/uploads/2012/04/Picture-4.png

Energy Shieldhttp://scifi.stackexchange.com/questions/31726/could-a-magnetic-field-disable-a-lightsaber

Personal Space Distance Charthttp://en.academic.ru/dic.nsf/enwiki/143810

Jammerhttp://www.globalsources.com/si/AS/HDT-Technology/6008842387402/pdtl/Military-Backpack-Jammer/1072753427.htm

Rhino Practice

Pipe

Sweep 2

Sweep 1