BACKGROUND AND PROJECT EXPERIENCE

CHENG LONG

Presented by

OverviewPersonal Information & BackgroundExperience & Project **Interest / HobbySummary

Personal Information Name: Cheng Long (程龙 ) Gender: Male Date of Birth: 02/11/1987 Nationality: P. R. China Language: Chinese, English, Cantonese

Working & Education Background 2011.6~present

Mechanical Engineer ASM Technology Singapore 2010.9~2011.6

Research Assistant The Hong Kong Polytechnic University

2008.8~2010.6 Master’s Degree The Hong Kong Polytechnic University Major: Mechanical Engineering

2004.9~2008.6 Bachelor’s degree Zhejiang University (浙江大学 ) Major: Process Equipment and Control Engineering (过程装备与控制工程 )

Personal Information & Background

Demonstration Capability: as a core member Team spirit: as an assisting member Project selection standard: as a student

Capability WIRE BONDER

Transducer; Bondhead; XY table; Optics; Work holder, Chassis, etc.

XY Table Role: Mechanical design & project execution through a whole project

Experience & Project

Main features Fastest wire bonder XY Table with 30g acceleration

(competitor: <20g) Linear motion technology (moving magnet) High precision Linear Way & Encoder Accuracy: 1 micron (>600Hz bandwidth)

Wire Bonder XY Table

Existing product Acceleration <20g Linear motion technology (moving coil) Bandwidth < 500Hz

X motor

Y motor

XY stage, CRW, Encoder

Coil

Coil

MagnetMagnet

Wire Bonder XY TableContent of work – Mechanical Design Specification & requirement understanding Conceptual design (e.g., moving magnet vs moving

coil) Critical components selection (e.g., LM guide, CRW,

encoder, etc.) Detail design and calculation, pre-analysis via CAE

(e.g., result analysis and structure stiffness optimization before releasing design)

Jig & fixtures design, prototype test & debug (by spectrum analysis approach)

Thermal & reliability test, etc.

X motor

Y motor

XY stage, CRW, Encoder

Coil

Coil

MagnetMagnet

Content of work – Project Execution Technique discussion with significant vendors (e.g., PM, IKO, HDH) Design for manufacture & assembly, design to reduce cost Assembly checklist lay down, operators training Mass production process follow up & coordination Field issue identifying & handling

Urgency handle Encoder issue in customer field (at demo stage)

Root cause identification Fast learning under pressure Issue debugging & solving Result & stability

Motor assembly in factory (Shenzhen plant)

Project status (Apr 2015) Design fixed & Major issue cleared Mass production and sale: middle 2015 Gained capability: design, execution, problem-solving

Wire Bonder XY Table

X motor

Y motor

XY stage, CRW, Encoder

Coil

Coil

MagnetMagnet

D/A ConvertorNI. PCI-M10-16E-1

SignalConditionerB&K 2691

Power AmplifierLab. Gruppen 300

Loudspeaker

M4 M3M1M2

3158061070071580300

Membrane under tension

Cross Section100 x 100

DownstreamUpstream

20

A/D ConvertorNI. PCI-4452

TRI

Length unit: mm

Y

X

Helium Bag

Experience & ProjectDemonstration Capability: as a core member Team spirit: as an assisting member Project selection standard: as a student

Team spirit Compact Plate Silencer

Assisting structure design & material preparing One critical moment: idea & execution

D/A ConvertorNI. PCI-M10-16E-1

SignalConditionerB&K 2691

Power AmplifierLab. Gruppen 300

Loudspeaker

M4 M3M1M2

3158061070071580300

Membrane under tension

Cross Section100 x 100

DownstreamUpstream

20

A/D ConvertorNI. PCI-4452

TRI

Length unit: mm

Y

X

Helium Bag

Joint: from screw connection to welding

6mm space earned

Experience & ProjectDemonstration Capability: as a core member Team spirit: as an assisting member Project selection standard: as a student

Team spirit Compact Plate Silencer

Assisting structure design & material preparing One critical moment: idea & execution

CHOICE #1

Experience & ProjectDemonstration Capability: as a core member Team spirit: as an assisting member Project selection: as a student

Project selectionChoice #1: challenge & interest – unknown factors Modeling, Design and Analysis of a Robot System for

Garment Inspection Mechanical model & control system establishment

(a paper published in ASME) Fuzzy logic PID Matlab simulink

Choice #2: safety – professional correlation Project related to injection mold design

MODELING, DESIGN AND ANALYSIS OF A ROBOT

SYSTEM FOR GARMENT INSPECTION

INTRODUCTION

Research objectiveA robot system, consisting of a

3-DOF robotic hanger and an adaptive controller, is proposed in this project

It is expected that this system can facilitate garment inspection process

Schematic diagram of The Robotic Hanger

INTRODUCTION

Main tasksTo establish the dynamic modelTo design a proper Fuzzy Logic PID

(FPID) controllerTo demonstrate the feasibility of the

proposed robot system with computer simulation

MODELING OF THE GARMENT HANGER

Physical modelA pair of symmetrical

mechanisms with a

body link, a shoulder

link and a sleeve link

driven by three AC

servo-motors

Physical View of The Robotic Hanger

Block diagram of Fuzzy Logic PID control

∑ ∑

cos Coefficient ∑

sign c

K

Ra

PlantPID Controller

G

f

fG

cos

)(sign

)(tVin

)(tVc

)(te

Force sensor

F

Desiredforce Fd

Outputforce F

)(tVm

Fuzzy LogicController

e

es

)(tKP

)(tK I

)(tKD∑

∑

∑

)(tKP

)(tK I

)(tKD

∑

PK~

DK~

IK~

PK

DK

IK

∑

∑

)(te

Memory

Memory

Memory

Different materials

PID FPID

Settings: c1inew=10c1i, c2inew=8c2i and c3inew=5c3i

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80

0.15

0.3

Simulation time (s)

Forc

e (N

)

Force on the body link

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80

0.1

0.2

Simulation time (s)

Forc

e (N

)

Force on the sleeve link

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80

0.2

0.4

Simulation time (s)

Forc

e (N

)

Force on the shoulder link

Set Value

PID

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80

0.15

0.3

Simulation time (s)

Forc

e (N

)

Force on the body link

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80

0.1

0.2

Simulation time (s)

Forc

e (N

)

Force on the sleeve link

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80

0.1

0.2

Simulation time (s)

Forc

e (N

)

Force on the shoulder link

Set Value

FPID

CONCLUSIONS

In a word, it can be concluded that the Fuzzy Logic PID control is effective in controlling the robot hanger and regulating the garment forces.

Overview Personal Information & Background Experience & Project ** Interest / Hobby Summary

Interest / hobby Badminton: 3rd prize at a team competetion in ZJU Chinese chess: 1st prize at high school

Overview Personal Information & Background Experience & Project ** Interest / Hobby Summary

Summary 优点 :

项目能力 ; 解决问题能力 ; 学习能力 团队协作责任感 ; 决心与激情

缺点 : 未做出实际成就时的包装能力

不是 天马行空 而是 能做事 , 可共事