General information


Subject type: Mandatory

Coordinator: Julián Horrillo Tello

Trimester: First term

Credits: 4

Teaching staff: 

Pablo Alberto Genovese
Rubén Soto Rubio 

Skills


Basic skills
  • B2-That the students know how to apply their knowledge to their job or vocation in a professional way and have the skills that are demonstrated through the elaboration and defense of arguments and the resolution of problems within their area of 'study

  • B4_That students can convey information, ideas, problems and solutions to both specialized and non-specialized audiences

     

Specific skills
  • Have knowledge and skills for the calculation, design and testing of machines

Description


The subject Mechanisms and Machines I, centered in the analysis of mechanisms, presents an integral training in this field incorporating also the subject of synthesis of mechanisms. It is a key element for the consolidation of learning, as it allows students to apply in the design of machine elements that has been worked on in other subjects. On the other hand, it is a key source of theoretical and applied knowledge for the professional practice of the mechanical engineer with regard to Machine Design.

Learning outcomes


As a result of the learning activity the student will be able to achieve the following learning outcomes:

  • LO5: Carry out kinematic and kinetic analysis of mechanical assemblies, machines and mechanisms, analytically or by simulation.
  • LO7: Use technical-scientific terminology related to mechanical systems, machines or mechanisms in different languages, especially English.


 

Working methodology


The development of the contents of the subject is based on the use of a methodology that integrates tools and methods used in professional practice. It is important to know, understand and apply the analysis and synthesis of mechanisms. The structure used for the study of the different mechanisms is based on the knowledge of the same through their identification and description, the deduction their operation, the understanding of the theoretical development of the bases for the calculation and the calculation in function of its specifications.
The face-to-face part of the course consists of 4 and 2 hours, alternating weekly, of theoretical classes in the classroom (large group) and two hours, fortnightly, of practical classes in laboratories (small group). In the theoretical classes, of expository and participatory character, concepts will be developed on analysis of position, speed, acceleration, statics and dynamics of mechanisms. In order to consolidate these concepts, exercises are carried out. In the laboratory practices students will work in groups of two or three people. In order to consolidate the topics worked on in the theoretical classes, in the practices works applied to elements of real machines are carried out.
During the course, students will have documentation of the topics developed in the theoretical and laboratory classes, and examples of solved exercises.

Contents


  1. Introduction to the kinematics and dynamics of machines
    • Kinematics and Kinetics.
    • Mechanisms and machines
    • Applications of kinematics
  2. Fundamentals of kinematics
    • Degrees of freedom or mobility
    • Kinematic links
    • Chains and Kinematic Diagrams
    • Mechanisms and structures
    • Grashof's condition
  3. Synthesis of mechanisms
    • Generation of function, trajectory and movement
    • Limit conditions
    • Dimensional synthesis
    • Coupler curves
    • Cognitive Mechanisms
  4. Position analysis
    • Coordinate Systems
    • Position and displacement
    • Translation, rotation and complex movement
    • Algebraic analysis of position of mechanisms
    • Position of any point on a mechanism
    • Transmission angles, Stiffening positions
    • The Newton-Raphson solution method
  5. Speed ​​analysis
    • Definition of speed
    • Sliding speed
    • Analytical solutions for speed analysis
    • Speed ​​of any point of a mechanism
  6. Acceleration analysis
    • Definition of acceleration
    • Analytical solutions for acceleration analysis
    • Acceleration of any point of a mechanism
    • Human tolerance for acceleration
  7. Analysis of static forces
    • Applied and restraining forces
    • Conditions for balance
    • Free body diagrams
    • Elements of two and three forces
    • Elements of four forces
  8. Fundamentals of dynamics
    • Laws of Newton's motion
    • Dynamic models
    • Moment of Inertia
    • Parallel axis theorem
    • Energy methods: virtual work
  9. Dynamic force analysis
    • Newtonian solution method
    • A single link in pure rotation
    • Force analysis of a crank and four bar articulated connecting rod mechanism
    • Strength and moment of shaking
    • Force transmission index in a mechanism

Learning activities


The following describes the evaluative learning activities that seek to help students acquire the Learning Outcomes of the subject and the teacher to obtain evidence that students achieved in them.
Evaluation activity 1: Written partial test 1 (Ex1).

  1. Description:
    • Written test (exam) of evaluation of the theoretical contents and the resolution of problems developed in the subjects from 1 to 7.
  2. Support Material:
    • Notes and bibliography of the subject
  3. Deliverables and links to the evaluation:
    • Test resolution.
    • Represents 35% of the total grade of the subject.
  4. Links to Learning Outcomes:
    • In the activity the evidence of having achieved the Learning results is obtained: LO5.

Evaluation activity 2: Written partial test 2 (Ex2).

  1. Description:
    • Written test (exam) of evaluation of the theoretical contents and the resolution of problems developed in the subjects from 8 to 10.
  2. Support Material:
    • Notes and bibliography of the subject
  3. Deliverables and links to the evaluation:
    • Test resolution.
    • Represents 35% of the total grade of the subject.
  4. Links to Learning Outcomes:
    • In the activity the evidence of having achieved the Learning results is obtained: LO5.

Evaluation activity 3: Laboratory Practices (Pr).

  1. Description:
    • Recognize, interpret, synthesize, simulate and calculate different mechanisms.
    • The activity is carried out in groups of 2-3 students in the laboratory.
  2. Support Material:
    • Notes and bibliography of the subject.
    • Internship script.
    • Teaching equipment, machine tools, measuring elements, tools and laboratory and workshop consumables.
  3. Deliverables and links to the evaluation:
    • Practice Experiment Report as indicated in the script.
    • This activity represents 20% of the final grade of the subject.
  4. Links to Learning Outcomes:
    • In the activity the evidence of having achieved the Learning results is obtained: RA5 and RA7.
  5. Laboratory sessions:
    • 5 laboratory sessions.

Evaluation activity 4: Work Report (Inf).

  1. Description:
    • Recognize, interpret, simulate and calculate a selected mechanism.
    • The activity is done in groups of 2-3 students.
    • The deliverable material of the activity is a report.
  2. Support Material:
    • Notes and bibliography of the subject.
    • Internship script.
    • Teaching equipment, machine tools, measuring elements, tools and laboratory and workshop consumables.
  3. Deliverables and links to the evaluation:
    • Report according to the script.
    • This activity represents 10% of the final grade of the subject.
  4. Links to Learning Outcomes:
    • In the activity the evidence of having achieved the Learning results is obtained: RA5 and RA7.

Evaluation system


The calculation for the Final Grade (NF) of the subject is:

NF = 0,35 Ex1 + 0,35 Ex2 + 0,1 Inf + 0,2 Pr

  • NF: Final Note
  • Ex1: 1st Partial Examination (35%).
  • Ex1: 2nd Partial Examination (35%).
  • Inf: Work Report Grade (10%) = (Inf1 + Inf2 + Inf3) / 3
  • Pr: Practice Note (20%) = (P1 + P2 + P3 + P4 + P5) / 5

Clarifications:

  • The minimum grade for each of the exams is 3,5. In the event that any of the grades for the Ex1 and Ex2 activities is below the minimum grade, the final grade for the subject will be limited to 4.
  • Minimum mark of Practices (Pr) is 4. In case the mark of Practices is below the minimum mark, the final qualification of the asignatura will remain limited to 4.
  • Minimum grade of Work Report (Inf) is 4. In case the grade of Work Report is below the minimum grade, the final grade of the subject will be limited to 4.

Recovery:

  • It will be possible to recover all the evaluation acts separately (1st Partial Examination, 2nd Partial Examination and Practices).

REFERENCES


Basic

Genovese, PA (2020). Notes on Mechanisms and Machines I. Mataró: ESUPT Tecnocampus.

Sanmiguel Rojas, E., & Hidalgo Martínez, M. (2014). Analysis of mechanisms. Madrid: Ediciones Paraninfo.

Complementary

Cardona Foix, S., & Clos Costa, D. (2008). Machine theory. Barcelona: Edicions UPC.

Erdman, AG, & Sandor, GN (1998). Mechanism Design: Analysis and Synthesis. Mexico City: Prentice Hall.

Norton, RL (2013). Machinery Design. Mexico City: McGraw-Hill - Interamericana de Editores SA de CV

Uicker, Jr., JJ, Pennock, GR, & Shigley, JE (2017). Theory of Machines and Mechanisms. New York: Oxford University Press.