4축 유압 시뮬레이터의 노면형상 구현에 관한 연구

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In the recent years, as the product liability(PL) act is enforced worldwide, manufacturers must be totally responsible for any defects in the quality of their products. It is important to evaluate the durability and the vibration against this circumstance. The better test for products is to experiment in the actual conditions. However, costs expenses and efforts for the experiment are needed to react the defects of product . This problems can be settled by simulator which supplies the realistic environments. It is especially useful in the test of the products which relate to the safety of human such as vehicles.
In this thesis, the 4 axes hydraulic simulator which is generally used in the automobile and the machine industry is designed and manufactured. Also, the driving algorithm and the program are developed to realize the displacement of road profile, and then the performance of the tracking response is measured.
The contents are as follows : (1) driving algorithm for driving the hydraulic actuators simultaneously, (2) measurement algorithm for transforming road profile into the displacement and (3) realization algorithm for actualizing road profile by using the hydraulic simulator. Each contents are correlated and details are as follows.
First, to ensure the reliability of the hydraulic actuator, the vehicle is excited up to the range of the maximum frequency using the sine wave. The 4 axes hydraulic actuator is developed, and then the correlations between the displacement and servo controller on each axis are examined. The hydraulic actuator is compensated.
Second, the measurement algorithm which can obtain the displacement signal is developed to realize the road profile using the 4 axes hydraulic simulator, and the acceptable displacement signal of the road profile in the hydraulic simulator is obtained by the accelerometers.
There is the difference between the response signals on the driving file and the expected signals in general vehicles because of the nonlinearity of the suspension, the tire, and etc.
Third, the algorithm and program are applied to the 4 axes hydraulic simulator in order to reduce this errors by the repetitive improvement method.
Analyzing and ensuring the input and output data through algorithm and program based on PC and window in real time is economically efficient and convenient to use. Moreover, the algorithm in the frequency domain which consists of many DSPs(Digital Signal Processing) is enable to solve the problems which can't solve in the time domain.
Alternative Title
A study on road profile realization of 4 axes hydraulic simulator
조선대학교 대학원
일반대학원 기계설계공학과
Awarded Date
Table Of Contents
목차 = I
List of Figures = IV
List of Tables = VIII
Nomenclature = IX
Abstract = XII
제1장 서론 = 1
1.1 연구필요성 및 배경 = 1
1.2 연구동향 = 2
1.3 연구내용 및 방법 = 5
제2장 4축 유압 시뮬레이터의 구성 = 9
2.1 유압 액츄에이터 = 11
2.2 서보밸브 = 14
2.3 유압 공급장치 = 17
2.4 서보 컨트롤러 = 20
2.5 신호처리 장치 = 21
제3장 4축 유압 시뮬레이터의 알고리즘 = 24
3.1 동시 구동 알고리즘 = 24
3.1.1 출력 프로그램 = 24
3.1.2 입력 프로그램 = 29
3.2 노면형상의 계측 및 생성 알고리즘 = 32
3.2.1 계측 및 생성 프로그램 = 35
3.3 노면형상의 구현 알고리즘 = 38
3.3.1 이론적 배경 = 38
3.3.2 가진 신호 생성 알고리즘 = 49
3.3.3 구현 프로그램 = 53
제4장 실험 및 고찰 = 58
4.1 동시 구동 알고리즘의 보정실험 = 58
4.1.1 서보엠프의 보정 = 58
4.1.2 변위의 보정 = 65
4.2 노면형상 계측 알고리즘의 검증 = 70
4.2.1 계측 프로그램의 검증 = 70
4.2.2 실험 환경 = 72
4.2.3 실차 계측 = 72
4.2.4 노면의 변위형상 = 79
4.2.5 1/5 스케일 자동차의 실험 = 83
4.3 노면형상 구현 알고리즘의 검증 = 86
4.3.1 주파수 응답함수 = 86
4.3.2 반복 개선작업 = 96
4.3.3 노면형상 구현 알고리즘의 결과 및 고찰 = 109
제5장 결론 = 110
5.1 동시 구동 알고리즘 = 110
5.2 노면형상 계측 및 생성 알고리즘 = 111
5.3 노면형상 구현 알고리즘 = 112
5.4 향후 계획 = 112
References = 114
金鍾泰. (2007). 4축 유압 시뮬레이터의 노면형상 구현에 관한 연구.
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General Graduate School > 3. Theses(Master)
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