Tarc UC

TAN YONG LI

YEN FOO SOON

DR YIP MUM WAI

TEAM KNIGHTFrom

:

PROBLEM STATEMENT

POOR AdaptionFULL Adaption to User

Perform OPTIMALLY

Bounday Condition

Not replaceable mode of operation

Exoskeleton <3.8kg of weight

PROCESS FLOW CHART

Function Analysis

Problem Statement

Cause and Effect Chain Analysis

ARIZ

Proposed Solution

FUNCTION ANALYSIS

Knee Frame Holder with Spring Socket

and RodBearing

Spring

Calf Frame

Knee Joint Plate

People (Knee)

Thigh FrameHolds

Holds Holds

Holds

Holds

Rubs

Turns

CAUSE AND EFFECT CHAIN ANALYSIS

Less Securing Joint

Unbalanced Force

Spring at One Side of Body

Hurt (Leg)

Misalignment of Joint

Poor System Adaption

Too Tight Around Joint

System Loose

Not Conforming to Body Physiology

ARIZ – SECTION 1

Step 1.1 Mini ProblemIt is necessary for the knee joint to fit to body without damaging or hurting the body of

user, while keeping the engineering system almost unchanged.

Knee Joint Plate Leg (Knee)

TOOL Product

Knee Joint Leg

Hurt

Adapt

Knee Joint Leg

Does Not Hurt

Does Not Adapt

EC-1 EC-2

Step 1.2 Tool and Product NOT SUITABLE

Step 1.3 Engineering Contradiction

Time Period 1 Period 2

T1 No conflict. No conflict.

T2 ZB rubs against knee ZA, ZC moves (rotate)

T3ZB press on knee and causes pain

ZA, ZC no longer at starting position.

Internal Substance External Substance

Tools Knee joint plate EnvironmentGround level / Structure

Product Knee

 Object of harmful action

Knee joint plate orientation Fabric/lace

Object of useful action Lace

STEP 2.1 OPERATING SPACESTEP 2.2 OPERATION TIME

STEP 2.3 SUBSTANCE FIELD RESOURCES

Rotation

Rubbing

Useful Zone of

Operation

STEP 3.1 IDEAL FINAL RESULT

X-component eliminates the misalignment issue and enables the joint to adapt to user completely in order to support body during operating time of T2 and T3

without making the system more complex and without any harmful consequences.

Tool / Product Substance ParametersTool: Joint plate Mild steel Contour (shape)

ThicknessDimension (size)Weight

Product: Knee Human flesh Contour (shape)Dimension (size)Circumference (radius)

Operating Space ResourcesBearing Flexible ball

bearingDegree of flexibility (rotation in x-y plane)Size

Frame holder Mild steel Dimension (size)Weight

Spring (torsion spring) 3mm stainless steel

Wire diameterCoil diameterMean diameterMaterial

Vibration from walking   Reaction force generatedDirection of vibration

Resultant force Spring DirectionLace Fabric Elasticity

Type

STEP 3.3 MACRO LEVEL PHYSICAL CONTRADICTION

• If body can adapt well to joint plate, then joint will be able to operate optimally, but it hurts leg.

Step 3.5 IFR Refinement

• During the release or compression of the plate, the plate must be able to provide on its own the restriction to stay static and has to provide structural

support to the spring.

BodyPlate

FMech

BodyPlate

FMech

DUE TO INSUFFICIENT

SECTION B - REMOVING THE PHYSICAL CONTRADICTION

Step 4.1 Physical Contradiction Solution

• Where do I want soft? I want soft on knee. • Where do I want not soft? I want not soft on spring.

Inventive Principles Description

Intermediary Add a layer of spongy material between knee and plate.

Asymmetry Create a knee plate that follows the knee shape of user.

Step 4.2 Su-Analysis and Solution

BodyPlate

FMech

Inventive Solutions Description

2.2.1 Add spongy in between knee and knee joint plate.

2.2.4 Use solid brace with magic strap.

Thigh Frame Holder Plate

Bearing

2 of this component at each side of knee.

Connected through a hard brace that joint with plate.

PROPOSED SOLUTIONIntermediary

THANK YOUFrom team knight

Yong Li Tan, Foo Soon Yen, Dr Mum Wai Yip