The resulting speed, identical for the three mechanical elements, corresponds to the electrical current flowing through the three electrical elements. Mathematical modelling of control system mechanical. Opticalmechanical system for oncombine segregation of wheat. These atoms start vibrating and transfer their energy to neighboring air molecules. Problem 2 on analogous systems force voltage and force current analogy video lecture of chapter mathematical modelling of physical systems in control systems for extc, instrumentation. Mep coordination in building and industrial projects clfe working paper abstract coordination of mechanical and electrical systems to detail their configuration provides a major challenge for complex building and industrial projects. Mathematical modelling of control system there are various types of physical systems, namely we have. Rogelio palomeraarias, university of texas at san antonio dr. The goal is to develop a method that represent the topology connection and the various components that make up a mechanical system, but hiding all the details. There are two analogs that are used to go between electrical and mechanical systems. Jan 30, 2019 we will derive analogies between mechanical and electrical system only which are most important in understanding the theory of control system. Jun 15, 2017 acoustic devices are often combinations of mechanical and electrical elements. Syed h slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.
Weaver, facility manager, birck nanotechnology center anna menze, research assistant purdue university education module. Mechanical systems electrical systems electronic systems thermal systems hydraulic systems chemical systems first off we need to understand why do we need to model these systems in the first place. When formed, this subcommittee was charged with the responsi bility of preparing a drafting standard covering electrical schematic, wiring and. At first, such analogies were used in reverse to help explain electrical phenomena in familiar mechanical terms. Introduction to automotive electrical and electronic systems. Using the forcevoltage analogy learned in the class, obtain a mechanical system analogous to the electrical system shown below you may use mechanical elements, such as mass m, damper b, spring k, for the answer. We specialize in the fields of electrical systems, industrial data communications, telecommunications, automation and control, mechanical engineering, chemical and civil engineering, and are continually adding to our portfolio of over 60 different workshops. Learn mechanical and electrical systems with free interactive flashcards. Since one type of system may be easier to handle experimentally than another. Thanks for the a2a the integration of electronic engineering, mechanical engineering, control and computer engineering mechatronics lies at the heart of the innumerable gadgets, processes and technology without which modern life would seem imp. By considering each mass in a linear mechanical system as having two terminals, one fixed in the mass and one fixed to the frame of reference, every linear mechanical system is reduced to a multiplicity of closed mechanical circuits to which force and velocity relations similar to kirchhoffs laws, may be applied. Analogous electrical and mechanical systems contents. This is obviously ohms law, and is analogous to dampers in mechanical systems. Acmv system consumes about 60% of the total energy consumption of a typical commercial building.
Designed to be highly visible and durable, our products. This is the node with 0 potential in an electrical system and serves as a reference to measure all other potentials in the system. Airconditioning and mechanical ventilation acmv systems. Cardiovascular system components of the cardiovascular system. Jun, 2005 by considering each mass in a linear mechanical system as having two terminals, one fixed in the mass and one fixed to the frame of reference, every linear mechanical system is reduced to a multiplicity of closed mechanical circuits to which force and velocity relations similar to kirchhoffs laws, may be applied. Mechanical and electrical building services engineering guidelines for primary school buildings february 2004 5. The mechanical system may be a linear mechanical system or it may be a rotational mechanical type of system. Mechanical systems personnel shall demonstrate a familiarity level knowledge of reading. Electrical and mechanical engineering are two different streams in the field of engineering that is a broad term encompassing many other disciplines such as computer, telecommunication, civil, mining, information technology, and so on. Just as pressure, or pressure differential, cause fluid to flow from point a to point b, dc voltage drives electrically charged particles to move from one point to another.
In case of electrical systems, the basic passive elements of electrical systems are resistance, inductance, and capacitance. Some of the greek symbols, used in the realm of electrical engineering, are listed in appendix c, for reference. The equations were written in terms of state variables x q1, q2, i1, i2 t. When electrons enter at one end of a resistor, some of the electrons collide with atoms within the resistor. Our instructors are highly respected in their fields of expertise and in the last ten years. Mechanicalelectrical analogies are used to represent the function of a mechanical system as an equivalent electrical system by drawing analogies between mechanical and electrical parameters. Volume 3 electrical and mechanical works section 44 abbreviations, standards and general electrical and mechanical 45 electrical power supply 46 low voltage switchboards 47 submains electrical distribution equipment 48 wiring and cables 49 cable management systems. Analogy between mechanical and electrical systems mechanical springmass electric rlc system with damping series circuit mx. A common example of this would be a loudspeaker connected to a power source. The nonsmooth modeling of mechanical and electrical systems allows for ideal unilateral contacts, sprag clutches and dry friction in mechanical systems and for ideal diodes and switches in.
In this way, a resistor dissipates electrical energy into heat energy. A simple mechanical system we will now illustrate the electro mechanical analogies by establishing the mechanical schematic of a simple system, the massspring system, then creating the two equivalent electrical circuits using the two analogies. Indicate the values of all components in the electrical system resistors, capacitors, inductors, etc. By comparing equation 4 and equation 6, we will get the analogous quantities of rotational mechanical system and electrical system. It is convenient to consider thermal systems as being analogous to electrical systems so that they contain both resistive and capacitive elements. Indicate the values of all components in the mechanical system springs, masses, dampers, etc. Mathematical modelling of control system mechanical electrical.
James clerk maxwell introduced analogies of this sort in the 19th century. Analogous nonsmooth models of mechanical and electrical systems. Me3017 worksheet analogous systems obtain the transfer functions for the following mechanical and electrical systems and confirm that these two systems are analogous. Resistance r spring constant k elastance 1c external force ft electromotive force. Analogous electrical and mechanical systems contents background. Electrical modeling page 2 voltage can also be defined in terms of potential energy of a unit charge. Compare differential equations for the mechanical translational system, mechanical rotational system and seriesparallel electrical system and prepare table for analogous quantities in force torque and voltagecurrent analogy. Two systems are said to be analogous to each other if the following two conditions are satisfied. Show full abstract and related to analogous mechanical elements. It should describe the types of things like arc resistant switchgear, mcc type and control, eht philosophy, electrical distribution management system and interface definition between electrical and other disciplines such as controls, mechanical. The transition period for the affected manufacturers and sectors ran until 1 july 2006.
The following table shows these analogous quantities. Pdf electrical machine1 free notes, ebook for electrical engineers. Sign conventions as in mechanical systems we must define the sense of each variable we use, and mark that on the diagram in electrical systems, a circuit diagram or schematic. Electrical engineering ac fundamentals and ac power, rauf be transformed into the desired unit system through the use of unit conversion factors in appendix b. Thus, we can see a distinct progress in the direction tow ards the developm ent of an analogous electrical g rid. Choose from 500 different sets of mechanical and electrical systems flashcards on quizlet. The most natural analogy of a mechanical system is therefore the indirect analogy. Difference between mechanical and electrical engineering.
Sustainable design must consider how well buildings work to minimize neg. The velocity of the car doesnt change instantaneously, so it starts at zero, and follows a saturating exponential up to v0, with a time constant mb. Electrical analogies of mechanical systems tutorialspoint. Cardiovascular system components of the cardiovascular. Bolton has 71 books on goodreads with 1269 ratings. Sign conventions as in mechanical systems we must define the sense of each variable we use, and mark that on the diagram in electrical systems, a. Similarly, there is a torque current analogy for rotational mechanical systems. In electrical circuits, the capacitor is the storage element, and therefore the voltage drop across the capacitor is proportional to the integral of the current. In this analogy, the mathematical equations of the rotational mechanical system are compared with the nodal mesh equations of the electrical system by comparing equation 4 and equation 6, we will get the analogous quantities of rotational mechanical system. It is possible to make electrical and mechanical systems using analogs. Harvard university division of engineering and applied. Subcommittee 15 electrical and electronic diagrams was formed on april 26, 1964, as a subcommittee of sectional committee yl4standards for draw ings and drafting.
Another disadvantage of mechanical instruments is that most of them are a potential source of noise and cause noise pollution. Analogous systems mathematical modelling of physical. Structure, mechanical and thermodynamic stability of vacancy. Find the analogous mechanical system using the forcecurrent analogy. View homework help analogous electrical and mechanical systems from engr 305 at san francisco state university. Using analogy to enhance understanding of electrical circuits. Explain the steps you use to find your electrical system. Mechanical, electrical and plumbing systems in construction management.
Mechanicalelectrical systems instructors manual mechanical electrical mechanicalelectrical systems developed by james mcglothlin, mph, ph. Mechanical, electrical and plumbing systems in construction. Engineering sciences 22 systems electrical modeling page 2 voltage can also be defined in terms of potential energy of a unit charge. Mechanical systems personnel shall demonstrate a familiarity level knowledge of reading and interpreting electrical diagrams and schematics. Theres one special node in both electrical and mechanical systems that are worth mentioning. An analogous electrical and mechanical system will have differential equations of the same form. The force f in a mechanical system is analogous to the current i in an electrical system as shown in figure 2. With the setvalued branch relations, the dynamics of electrical circuits are described as measure differential inclusions. The input vint is a step functionzero until the engine couples, and then at a constant velocity v0 thereafter. A mechanical system by itself can be so represented, but analogies are of greatest use in electromechanical systems where there is a connection between. Indeed, there are four independent energy storage elements in the.
Pdf comparison of mechanical and electrical downtilt. Electrical and mechanical chapter 8 washington state bridge inspection manual m 3664. The equations were written as four firstorder equations, which suggests a fourthorder system. It is analogous to the viscous friction element of mechanical system. There are two types of electrical analogies of translational mechanical systems. The conventional mechanical electrical analogy is derived from the similarity of the equations vfz and lez. We start the discussion with a way of describing 1dof, rotational mechanical systems similar to the way we do it with electrical circuits. G rain protein concentration is an important fac tor that determines the value of various cereal crops with premiums paid for high quality grain that meets the specific requirements of end users. Craig 2 electrical mechanical analogies a signal, element, or system which exhibits mathematical behavior identicalto that of another, but physically different, signal, element, or system is called an analogous quantity or analog. Moreover, nodes in mechanical system are analogous to nodes in electrical network the electro mechanical analogy can be classified into two categories. For the electrical system that we have studied in lectures along with the analogous mechanical system. Specialized consultants and contractors design and construct these systems.
It is useful in engineering applications to model the entire system with one method. Harvard university division of engineering and applied sciences. Analogous nonsmooth models of mechanical and electrical. Those are force voltage analogy and force current analogy.
Analogous systems force voltage and force current analogy. Electrical systems and mechanical systems are two physically different systems. Intro to electricity nyu tandon school of engineering. This is the reason for using a circuit analogy in a vibrating mechanical system. The voltage drop across a conductor in an electrical system. In this analogy, the mathematical equations of the rotational mechanical system are compared with the nodal mesh equations of the electrical system.
Find the analogous electrical system using the forcevoltage analogy. Mechanical electrical analogies are the representation of mechanical systems as electrical networks. Introduction to mechanical and electrical systems, sustainable design, and evaluating options 3 1. Comparison of mechanical and electrical downtilt mechanical electrical colors indicate mechanical and electrical downtilt angles. The primary quantities involved in the electrical system are voltage e and current i, while the analogous quantities in the mechanical system are torque t and speed w, respectively. Th e purpose of various electronic accessory systems. Obtain mathematical model of simple mechanical and electrical system.
Equipment commissioning procedure ehs00017 r14 printed copies are considered uncontrolled. Ptd mechanical electrical systems instructor s manual iii. Engs 22 systems system analogies page 2 m b vint frictionless fig. The term mechatronics is used for this integration of microprocessor. A strategic goal of the prevention through design ptd plan for the national initiative is. Electrical system normally depends upon a mechanical meter movement as indicating device.
Oct 28, 2017 problem 2 on analogous systems force voltage and force current analogy video lecture of chapter mathematical modelling of physical systems in control systems for extc, instrumentation. However, as electrical network analysis matured it was found that certain mechanical problems could more. Dc electrical current is analogous to fluid flow in mechanical or hydraulic systems. Electrical systems electrical systems, as with mechanical. The concept of analogous system is very useful in practice. However, it is more common to see equivalent networks represented using the direct analogy, mostly to avoid mixing the two analogies when coupling it to an. In germany, the electrical and electronic equipment act came into effect on 16 march 2005, which, along with the rohs, also adopted eu directive weee disposal of waste electrical and electronic equipment in german law. Electrical methods of indicating the output of detectors are more rapid than mechanical methods.
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