Variable Frequency Electrical System in Conventional Aircraft

This project has many applications and many future expansions and functions that can be added on. By having a variable floating DC power supply, 7Hz-6 KHz function generator, and oscilloscope with leads connecting to any circuit built, the comprehensive hands-on learning tool would be ideal for most DeVry students.

NASA’s objective is to use this technology to ensure greater efficiency in rotor vehicles. With the introduction of superconducting motors came the potential to revolutionize rotorcraft design. Rotorcraft would no longer be constrained by motor placement of drive shafts that power rotors. The intent of the cryogenic power system project is to design and build a superconducting induction machine and to investigate how it will operate on hybrid aircraft and rotorcraft. With the recent advent of HTS, the design of cryogenic motors is still in the nascent phases; however, the potential applications of these cryogenic motors are abundant. In order to start this investigation, we designed and built a cryogenic doubly fed cryogenic synchronous wound rotor electric machine. Through this prototype motor, the groundwork will be set for further research to create more practical models of systems to help the advancement of the technology in the industry. The aircraft displayed in Figure 1a and 1b are examples of an all-electric powered tilt-wing aircraft and a future tiltrotor concept for commercial

Helicopter is known for being extremely challenging to fly. The helicopter flight controls enables the pilot to attain a controlled flight. The flight controls differ drastically when compared to the fixed wing aircraft. The advancement in flight controls namely fly-by-wire system has resulted in reducing the complexity of the system. The state of the art fly-by-wire system has resulted in increasing the performance and at the same time reduces the workload of a pilot. The four main controls include - collective pitch control, cyclic pitch control, throttle control and anti-torque pedals. The employment of fly-by-wire has thus paved way for reduction in weight whilst providing more space for comfort and effortless handling. The commercial helicopter are beginning to utilize the fly-by-wire technology after being tried and tested by fixed wing aircraft and military helicopter. The goal of this technical essay is to provide an overview of the evolution helicopter flight controls from the earlier complex analog phase to the present simplified digital phase.

Design changes: Reduction of noise at the source such as exhausts from aircrafts and ground vehicles, airframe noise and power-plants via noise reduction technologies. Especially regarding aircrafts, they have become quitter over the years as the technological advancement in propulsion system of the aircraft has allowed the manufacturers to build less noisy aircrafts compared to its predecessors [9]. A possible future solution for the noise pollution relating to combustion aircrafts could be electric aircrafts. It would be an ideal solution for the

i) The Development of an inverter with the desired frequency and voltage rating capable of providing the power requirement needed to

Abstract: Load frequency control problem is considered as one of the most important issues in the design & operation of power systems. Due to lack of good efficiency in parameters variation conditions, working conditions of system and non-linear factors, a simple PI controller is not suitable in industrial applications. Instead, fuzzy controllers can be used in order to enhance the performances of the systems. In this paper, the use of the optimized type-1 fuzzy logic controller using Particle Swarm Optimization (PSO) algorithm is proposed to solve the load frequency control problem. To the best of our knowledge, the PSO optimization of fuzzy type-1 controller in order to solve load-frequency control problem, has not been investigated so far. The proposed controller has good performance and is capable to solve the load-frequency control problem in conditions of wide variations of system parameters and nonlinear factors such as generation rate constraint. Simulation results show that the optimized fuzzy controller proposed in this paper exhibits better performance compared to PI controller in damping of system deviations.

Brushless DC (BLDC) motors are used for many low and medium power drives applications due to their high efficiency, high flux density per unit volume, low maintenance requirement, low EMI problems, high ruggedness and a range of speed control. The commutation in PMBLDCM is accomplished by solid state switches of a three phase voltage source inverter (VSI). There is a necessity of an improved power quality (PQ) as per the

The variable switching technique is a part of the conventional DTC technique . It was firstly introduced by Takahashi and Noguchi around 1980’s this method is the wide band of the switching frequency of the inverter even when the flux and torque references are kept constant. The conventional DTC scheme has some inherent

As per references [2], [6], [7], [9] any device with nonlinear characteristics which derive their input power from a sinusoidal electrical system may be responsible for injecting harmonic currents & voltages into the electrical system [2, 6, 7, 9 ]. Francisco C. De la rossa [2] have described ,all possible nonlinear loads . Among them few are Power converters such as Variable frequency drives, DC motor controllers, Cycloconverter, Cranes, Elevators ,Steel mills, Power supplies, UPS,Battery chargers, Inverters & ARC devices such as Fluorescent lighting, ARC furnaces, Welding machines. According to authors [2] ,[7] Even linear loads like power transformers can act nonlinear under saturation conditions. This occurs beyond the so-called saturation knee of the magnetizing curve of the transformer. [2],[7].

With tremendous growth of power electronic industry and computer industry, the quality of power has become very

Since a long time research have been in this filed which now a days finally lead us to the modern aviation industry.

Aircraft maintenance is very important for aviation industry and Aircraft are required to be maintained after a period of calendar time or flight hours or flight cycles. Aircraft maintenance is the inspection, repair, overhaul, modification of aircraft or aircraft component. Aircraft maintenance generally includes such tasks those tasks required to restore or maintain an aircraft’s systems, components, and structures with Airworthiness Directives or Service Bulletins and this is highly regulated, in order to ensure safe and correct functioning during flight. Aircraft maintenance requirements vary for different size and types of aircraft, experience which most aircraft need various type of preventive maintenance every 25 hours or less of flying time, and minor maintenance at least every 100 hours. Maintenance is influenced by some kind of operation, climatic conditions, storage facilities, age, and construction of the airplane. The profession of Aircraft maintenance requires extreme knowledge and adept expertise in performing the ingrained tasks. The aircraft maintenance engineer who is on duty he has a great responsibility to work professionally to ensure the safety of aircraft, customers and maintain the reputation of the team or company. The aircraft maintenance engineer normally works in an aircraft hangar and line maintenance and The aircraft maintenance engineer will undertake a number of processes including They may specialize by working on particular aeronautical

Electricity is the physical phenomena associated with the presence and flow of electric charges. It plays a vital role in our day to day life. It is used in industries and household appliances like fan, television, computer, heater etc. Without electricity it is difficult to lead our life comfortably. In present generation, the consumption of electricity is more than its production. Hence, huge amount of electrical energy has to be produced to meet the present requirements. There are a plenty of ways by which electrical energy can be produced which includes the usage of both renewable and non-renewable energy resources like solar energy, wind energy, nuclear energy etc. This proposal deals with the production of electricity by using Magenn Air Rotor System (MARS) which is one of an airborne wind energy systems. It requires very minimal wind to function and its implementation saves the conventional energy sources as well as create pollution free environment.

Tesla pointed out the inefficiency of Edison’s direct current electrical powerhouses that have been build up and down the Atlantic seaboard. The secret, he felt, lay in the use of alternating current, because to him all energies were cyclic. Why not build generators that would send electrical energy along distribution lines first one way, than another, in multiple waves using the polyphase

Bose, B. K. (2009): Power Electronics and Motor Drives Recent Progress and Perspective. IEEE Transactions on Industrial Electronics. Vol. 56 (2): pp. 581–588.