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- Common courses
- Liberal arts and basic science courses
- Academic unit or major
- Graduate major in Mechanical Engineering
- Instructor(s)
- Takeda Yukio
- Class Format
- Lecture
- Media-enhanced courses
- Day/Period(Room No.)
- Intensive ()
- Group
- -
- Course number
- MEC.H435
- Credits
- 1
- Academic year
- 2020
- Offered quarter
- 3Q
- Syllabus updated
- 2020/10/5
- Lecture notes updated
- -
- Language used
- English
- Access Index
-
Course description and aims
The students know the fundamental means for mass balancing and power smoothing of single slider reciprocating machines and other general mechanical systems. The students have the ability to explain and derive the mass forces and mass moments of single and multi-slider reciprocating machines. The students know about the basic relations, resulting in fluctuating angular velocities due to varying mass moments of inertia and varying loads as reduced to a reference shaft. The relations can be derived and explained.
Student learning outcomes
The influencing factors for fluctuating speeds in single and multi-slider reciprocating machines can be described. Based on that, potential means for power smoothing can be derived. Students have the ability to derive the required kinematic and dynamic relations for the machines and mechanisms under investigation. Moreover, balancing of machines and mechanisms with high mass forces can be performed, including design issues and mathematical derivations. From the dynamic analyses, students learn to develop practical and innovative instructions for mass balancing and power smoothing. To sum up, student gain fundamental knowledge that can be applied to related industrial challenges (including special machine construction and specifications) in the field of design improvement by means of mass balancing and power smoothing.
Keywords
planar kinematics and dynamics of rigid bodies, dynamic force and motion analysis of planar mechanisms with rigid links, mass balancing for reciprocating machines, power smoothing in mechanisms and slider reciprocating machines, equations of motion
Competencies that will be developed
| ✔ Specialist skills | ✔ Intercultural skills | Communication skills | Critical thinking skills | ✔ Practical and/or problem-solving skills |
Class flow
The lectures are given by a guest lecturer, Prof. Mathias Huesing, RWTH Aachen University together with the corresponding instructor, Prof. Yukio Takeda.
Students are required to self-study the contents prior to the class using the supplementary material. Based on this, homework problem is given and then, evaluation is done at the final presentation.
Course schedule/Required learning
| Course schedule | Required learning | |
|---|---|---|
| Class 1 | Introduction | Plane slider-crank mechanism Dynamically equivalent system for the connecting rod |
| Class 2 | Kinematics of the slider-crank mechanism | Inertia forces (shaking forces) Effect of inertia forces acting on the frame |
| Class 3 | Effect of inertia forces acting on the frame and basics of balancing of inertia forces/ of shaking forces | The Basics: Balancing of inertia forces / of shaking forces Complete balancing of inertia forces (shaking forces) Balancing by countermass at the crank (1st harmonic) |
| Class 4 | Complete balancing of 1st and 2nd harmonic | Experiment: Measurement of shaking forces and balancing of single cylinder engine Inertia / shaking torques (especially frame torque) |
| Class 5 | Multi Slider Reciprocating Machines | Design: different structures Determine inertia forces by analytical approach Determine inertia forces by graphical approach Balancing of inertia forces |
| Class 6 | Determination of shaking moments of multi-cylinder engines | Balancing of shaking moments of multi-cylinder engines Power balancing: introduction and outlook Kinetic energy Potential energy Solutions of the equation of motion |
| Class 7 | Presentation of homework | Application of the content of the lecture in research and applications |
Textbook(s)
Original hand-outs are provided.
Reference books, course materials, etc.
References are uploaded in OCW-i.
Assessment criteria and methods
Learning achievement is evaluated at the final presentation.
Related courses
- MEC.D201 ： Mechanical Vibrations
- MEC.I211 ： Robot Kinematics
Prerequisites (i.e., required knowledge, skills, courses, etc.)
Nothing
