Kassandra Whiteford Dr. Ruzhitskaya Foucault Pendulum Experiment 1-30-18 Support of Foucault’s Pendulum The Foucault’s Pendulum was named after French Physicist Leon Foucault (Sommeria). He created the experiment to prove that the Earth is in a constant state of rotation. The experiment was simple, a Pendulum was created with a weight on the end of a wire which was attached to a fixed point on the ceiling, once set in motion it continued to move and slowly rotated its position. The use of the
Harmonic Optimization of Multilevel Converters Using Big Bang-Big Crunch Optimization Method Dr.H.R.Kamath Mr.Pawan Pandey Dept. of electrical engineer Dept.of electrical engineering Manipal University Malwa Institute of Technology Karnataka, India Indore,India Iti Mahashabde Dept. of electrical engineer Malwa Institute of Technology Indore, India Abstract—This paper proposes a method for optimization of the harmonic
Compare jitter, shimmer and harmonics to noise ratio in terms of the types of information each provides? Jitter and shimmer are measures of the cycle-to-cycle variations of fundamental frequency and amplitude, respectively, which have been largely used for the description of pathological voice quality. Jitter is also known as frequency perturbation and refers to the minute involuntary variations in the timing variability between cycles of vibration. In essence, it is a measure of frequency variability
approach was evident in his formal and harmonic arrangement in the first movement of Sonata Op.31 No.1. Distinctive harmonic departure from the classical sonata form convention fills the movement with drama. In classical sonata form convention, tonality is to be established in the first theme with no ambiguity so as to make contrast with the second theme, which is normally set in the dominant. In the first movement of Beethoven’s sonata Op.31
Acoustic Theory and Synthesis Frequency: Frequency means the number of cycles per second and depending on the amount of cycles per second determines how high or low pitched the sound is and the time that it takes to complete one cycle is called the period. Frequency is measured in Hertz (Hz). And An average human is able to hear sounds between 20Hz and 20,000Hz. As the cycles per second increases, the smaller the wavelengths become, therefore there is a higher frequency which will cause
produce a different harmonic sound. Any sound that is produced by any musical instrument can be very complex where they contain infinite amount of sine waves of different frequency levels, one of the most common genres is the pitch called for the fundamental frequency. There is 3 types of complex waves associated with sound the triangle wave, sawtooth wave and the square wave which are all made from the different harmonic sounds which show the difference between each individual harmonic as explained
severely affects the power’s quality is the presence of the harmonics, which affects the performance of the system. Some of the problem caused by the harmonics are metal parts’ overheating, increasing noises in motors, decreasing the efficiency of the motors, etc. some corrective methods can be used to reduce its effect. Contents Introduction 3 What is Power Quality? 4 Harmonics-Basic Concepts 5 The Affects 6 Solution 7 Line Reactors 7 Harmonic Filters 7 12 Pulse Rectifiers 7 Benefits 8 Conclusion 8
containing harmonics from the supply which in turn causes voltage harmonics. Current harmonic causes increased power system losses, excessive heating in rotating machinery, interference with nearby communication circuits and control circuits, etc. It has become a vital importance to maintain the sinusoidal nature of voltage and currents in the power system. Various international agencies like IEEE and IEC have issued standards, which put limits on various current and voltage harmonics. The limits
In previous chapters, the advantages and disadvantages of several modulation methods for multilevel converter have been summarized. In this chapter Fourier series and harmonic elimination theory is discussed briefly to derive the transcendental equations for the fundamental frequency switching method for multilevel inverter. In the second part of this chapter a new evolutionary technique Big Bang-Big Crunch optimization is used for solving the transcendental equations for the fundamental frequency
contain certain amount of harmonics in the output. Inverters quality is expressed with the help of parameters of performance. Parameters like lower order harmonics (LOH), total harmonic distortion (THD) Distortion Factor basically plays a vital role on the performance of an inverter. Harmonics give undesirable effects the following undesirable effects [1]-[2. Ill effects of harmonics are A. Poor Quality Supply As all power electronic converters generate harmonic currents, which will