Fabrication, Modeling, and Experimental Study of the Compliant Mechanism-based Planar Monolithic Structure : Bistable Linear Stage for Augmented Reality (AR) Glasses
- 주제(키워드) robotics , compliant mechanism
- 주제(DDC) 621.8
- 발행기관 아주대학교
- 지도교수 고제성
- 발행년도 2021
- 학위수여년월 2021. 8
- 학위명 석사
- 학과 및 전공 일반대학원 기계공학과
- 실제URI http://www.dcollection.net/handler/ajou/000000031080
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
In a sub-millimeter scale, the conventional mechanical systems including the rigid linkage mechanism can be hardly applied due to limitations on efficiency and manufacturability. Especially, the energy loss caused by friction force over Newtonian force deteriorates energy efficiency of the mechanical systems. To increase efficiency and simplicity of the small-scale mechanical systems, a compliant mechanism is one of the candidates replacing conventional linkage mechanisms. Here, we introduce two types of compliant mechanism-based monolithic structures which are the so-called bistable parallelogram linear stage (BPS) and origami-based deformable morphing structure. These structures are fabricated by a simple manufacturing process and designed by a simplified compliant mechanism and kinematic model. For measuring quantitative performances of structures, we perform experimental studies in terms of energy efficiency and adjustable shape deformation. By using these characteristics, monolithic structures are applied to a variety of device types including an actuator for the wearable AR glasses and body shell of vehicle. In addition, we show that devices equipped with monolithic structure can overcome engineering problems such as the energy efficiency of wearable devices which can be hardly solved by conventional mechanical systems and the mechanical stiffness of morphing structures which are fabricated by elastomeric materials.
more목차
1. Introduction 1
2. Bistable parallelogram linear stage (BPS) 3
2.1. Introduction 3
2.1.1. Compliant mechanism 3
2.1.2. Optical wearable device 3
2.1.3. Purpose 5
2.2. Materials and Methods 6
2.2.1. Fabrication process of BPS and actuator module 6
2.2.2. Actuation mechanism of actuator module 8
2.2.3. Pseudo-rigid-body (PRB) model on BPS 9
2.2.4. Experimental setup and performance characterization 11
2.3. Results and discussion 15
2.3.1. Strategy for improving structural stability and energy efficiency 15
2.3.2. Performance of actuator module including BPS 18
2.3.3. Actuating compact AR devices 21
3. Origami-based deformable morphing skin 23
3.1. Introduction 23
3.1.1. Origami structure for morphological shape 23
3.1.2. Actuator for deforming origami structure 27
3.1.3. Purpose 28
3.2. Kinematic design 32
3.2.1. Geometric configuration of the unit pattern 32
3.2.2. Geometric relationship between individual unit pattern 35
3.2.3. Global radius of curvature of origami structure 38
3.3. Fabrication and actuation mechanism 40
3.3.1. Origami structure 40
3.3.2. Pneumatic pouch actuator 42
3.3.3. Integration 43
3.3.4. Actuation mechanism 45
3.4. Results 46
3.4.1. Experiment for curved morphing structure characteristic 46
3.4.2. Body shell of vehicle 47
3.4.3. Large area morphing skin for reconfigurable shape 48
3.5. Future work 50
4. Discussion 51
References 52
