권호기사보기
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Title Page
ABSTRACT
Contents
1. Introduction 13
1.1. Gait rehabilitation 13
1.2. Body weight support(BWS) system 14
1.3. Interactive treadmill(ITM) 16
1.4. Body weight support(BWS) system for interactive treadmill 17
1.5. Control strategy for conventional body weight support(BWS) system 18
1.5.1. zeroG body weight support system 18
1.5.2. FLOAT body weight support system 19
1.6. Purpose of the research 20
2. Background 22
2.1. Series elastic actuator(SEA) 22
2.1.1. Concept of the series elastic actuator 22
2.1.2. Characteristics of series elastic actuator 23
2.2. Time delay control(TDC) 24
2.3. Time delay control(TDC) based impedance control 26
2.4. TDC based force tracking impedance control 27
3. Method 29
3.1. Hardware 29
3.1.1. Frame of the body weight support system 29
3.1.2. Motor and motor driver setup & specification 30
3.1.3. Load cell setup & specification 31
3.2. Proposed controller 32
3.2.1. Concept of the impact absorption 32
3.2.2. Applying concept to two-cable driven mechanism 34
3.2.3. Applying switching control method 35
4. Results 36
4.1. Non-human experiment, barbell test 36
4.1.1. Comparison with TDC based impedance control and PID 36
4.2. Human walking experiment, asymmetric gait 38
4.2.1. Comparison with proposed controller and PID (conventional treadmill) 38
4.2.2. Comparison with proposed controller and PID (interactive treadmill) 39
5. Conclusion and Discussion 40
5.1. Hardware and control limitation 40
References 41
요약문 43
Figure 1.1. Concept of the body weight support(BWS) system 14
Figure 1.2. (a) Mechanical setup (b) Visual feedback 16
Figure 1.3. Concept of two-cable driven BWS system 17
Figure 1.4. Deriving equation for controlling in two direction 17
Figure 1.5. Description of zeroG body weight support system 19
Figure 1.6. Description of FLOAT body weight support system 20
Figure 2.1. Electro-magnetic series elastic actuator model 22
Figure 2.2. Mass spring damper system 26
Figure 3.1. Definition of two body weight support system 29
Figure 3.2. Winch and motor coupled with gear box 30
Figure 3.3. Load cell setup 31
Figure 3.4. Block diagram of implemented control scheme 33
Figure 3.5. Applying two-phase control algorithm to two-cable driven mechanism 34
Figure 3.6. Switching control scheme and conditions 35
Figure 4.1. A. force result of wire 2(left side), B. force result of wire 1(right side) 36
Figure 4.2. Total vertical force result, TDC based impedance control(Md 20, Bd 800, Kd 8000)[이미지참조] 37
Figure 4.3. A. force result of wire 2(left side), B. force result of wire 1(right side) 37
Figure 4.4. Total vertical force result, PID controller(Kp 30, Ki 50, Kd 0.2)[이미지참조] 37
Figure 4.5. A. PID controller(Kp 50, Ki 50, Kd 0.2),...[이미지참조] 38
Figure 4.6. A. PID controller, B.TDC based impedance control(without PID) 38
Figure 4.7. Description of the human walking test (interactive treadmill) 39
Figure 4.8. Result of the PID controller (interactive treadmill) 39
Figure 4.9. Result of the proposed controller (interactive treadmill) 39
Equation. (1.1) [제목없음] 19
Equation. (2.1) [제목없음] 22
Equation. (2.2) [제목없음] 23
Equation. (2.3) [제목없음] 23
Equation. (2.4) [제목없음] 23
Equation. (2.5) [제목없음] 23
Equation. (2.6) [제목없음] 23
Equation. (2.7) [제목없음] 23
Equation. (2.8) [제목없음] 24
Equation. (2.9) [제목없음] 24
Equation. (2.10) [제목없음] 24
Equation. (2.11) [제목없음] 24
Equation. (2.12) [제목없음] 25
Equation. (2.13) [제목없음] 25
Equation. (2.14) [제목없음] 25
Equation. (2.15) [제목없음] 25
Equation. (2.16) [제목없음] 25
Equation. (2.17) [제목없음] 25
Equation. (2.18) [제목없음] 26
Equation. (2.19) [제목없음] 26
Equation. (2.20) [제목없음] 26
Equation. (2.21) [제목없음] 27
Equation. (2.22) [제목없음] 27
Equation. (2.23) [제목없음] 27
Equation. (2.24) [제목없음] 27
Equation. (2.25) [제목없음] 27
Equation. (2.26) [제목없음] 27
Equation. (2.27) [제목없음] 28
Equation. (2.28) [제목없음] 28
Equation. (2.29) [제목없음] 28
Equation. (3.1) [제목없음] 32
Equation. (3.2) [제목없음] 33
Equation. (3.3) [제목없음] 33
Equation. (3.4) [제목없음] 34
Equation. (3.5) [제목없음] 34
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