As a freelancing draughtsperson, I have received widespread experience for my contributions in both mechanical and electrical draughting while being involved in product development, presentation, and design reviews. My work involved a combination of technical expertise and creativity. I also brings together technologies from different environments and works inventively. In so doing, I am able to translate ideas into working products that meet the needs. I also endeavour to help engineering designers in improving their productivity. My primary function was to identify the specific needs of professionals designers within the construction industry and then to meet these requirements in a professional, time sensitive and cost-effective manner. I also offer services as complex as Concept Design, Project Planning and Compiling Design Applications or Presentations. I work with a team of skilled and experienced draughtsman from different disciplines who are dedicated to providing reliable and professional service that is on time every time. We use the latest Synchronous 3D modelling software and also use laser as well as infrared reflector-less surveying equipment onsite when producing layout drawings, assembly or detail drawings and mechanical surveying depending on the clients requirements.

Monday, September 12, 2016

Electromechanical Modeling | Engineering

The purpose of Electro-Mechanical Modeling is to model and simulate an electro-mechanical system, such that it's physical parameters can be examined before the actual system is built. Parameter estimation and physical realization of the overall system is the major design objective of Electro-Mechanical modeling. Theory driven mathematical model can be used or applied to other system to judge the performance of the joint system as a whole.

In engineering, electromechanics combines electrical and mechanical processes and procedures drawn from electrical engineering and mechanical engineering. Electrical engineering in this context also encompasses electronics engineering. Devices which carry out electrical operations by using moving parts are known as electromechanical. Strictly speaking, a manually operated switch is an electromechanical component, but the term is usually understood to refer to devices which involve an electrical signal to create mechanical movement, or mechanical movement to create an electric signal. Often involving electromagnetic principles such as in relays, which allow a voltage or current to control other, usually isolated circuit voltage or current by mechanically switching sets of contacts, and solenoids, by which a voltage can actuate a moving linkage as in solenoid valves. Piezoelectric devices are electromechanical, but do not use electromagnetic principles. Piezoelectric devices can create sound or vibration from an electrical signal or create an electrical signal from sound or mechanical vibration. Before the development of modern electronics, electromechanical devices were widely used in complicated systems subsystems, including electric typewriters, teleprinters, very early television systems, and the very early electromechanical digital computers.

Beginning in the last third of the century, much equipment which for most of the 20th century would have used electromechanical devices for control, has come to use less expensive and more reliable integrated microcontroller circuits containing ultimately a few million transistors, and a program to carry out the same task through logic, with electromechanical components only where moving parts, such as mechanical electric actuators, are a requirement. Such chips have replaced most electromechanical devices, because any point in a system which must rely on mechanical movement for proper operation will have mechanical wear and eventually fail. Properly designed electronic circuits without moving parts will continue to operate properly almost indefinitely and are used in most simple feedback control systems, and appear in huge numbers in everything from traffic lights to washing machines.

The modeling of purely mechanical systems is mainly based on the Lagrangian - a mathematical function called the Lagrangian is a function of the generalized coordinates, their time derivatives, and time, and contains the information about the dynamics of the system. No new physics is introduced in Lagrangian mechanics compared to Newtonian mechanics which is a function of the generalized coordinates and the associated velocities. If all forces are derivable from a potential, then the time behavior of the dynamical systems is completely determined. For simple mechanical systems, the Lagrangian is defined as the difference of the kinetic energy and the potential energy. There exists a similar approach for electrical system. By means of the electrical co-energy and well defined power quantities, the equations of motions are uniquely defined. The currents of the inductors and the voltage drops across the capacitors play the role of the generalized coordinates. All constraints, for instance caused by the Kirchhoff laws, are eliminated from the considerations. After that, a suitable transfer function is to be derived from the system parameters which eventually governs the behavior of the system. In consequence, we have quantities (kinetic and potential energy, generalized forces) which determine the mechanical part and quantities (co-energy, powers) for the description of the electrical part. This offers a combination of the mechanical and electrical parts by means of an energy approach. As a result, an extended Lagrangian format is produced.

Mamphake Mabule
Draughtsman | Mamphake Designs
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