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q explain state-variable techniquesthe matrix formulations associated with state-variable techniques have largely replaced the block-diagram
q dynamic response of control systemsthe existence of transients and associated oscillations is a characteristic of systems that possess
q explain about capital stockcapital stock illustrates the amount of the owners investment in the
q illustrate about transfer functionsthe transfer function is a means by which the dynamic characteristics of devices or systems are described the
q classify feedback control systems according to purpose of the systembull position control systems here the output position such as the shaft
q sampled-data and digital control systemsthese differ fromthe continuous-data systems in that the signals at one or more points of the system are in
q explain continuous-data and discrete-data systemsa continuous-data system is one in which the signals at various parts of the systemare all
q explain time-invariant versus time-varying systemswhen the parameters of a control systemare stationary with respect to time during the operation
q explain linear versus nonlinear control systemslinear feedback control systems are idealized models that are conceived by the analyst for the sake
q determine the armature current and torque anglea 1500-hp 6600-v six-pole 60-hz three-phase wye-connected synchronous motor with a synchronous
consider the 220-v 1800-rmin dc motor controlled by a three-phase fully controlled rectifier from a 60-hz ac source the armature-circuit resistance
consider a 3-hp 220-v 1800-rmin separately excited dcmotor controlled by a single-phase fully controlled rectifierwith an ac source voltage of 230vat
q illustrate power semiconductor devicessince the advent of the first thyristor or silicon-controlled rectifier scr in 1957 tremendous advances have
q explain basic control systemselectric energy is widely used in practice because of the ease with which the system and device performance can be
digital transmission on fading multipath channelswe have discussed thus far digital modulation and demodulation methods for the transmission of
let both coherent ask and coherent psk systems transmit the same average energy per bit interval and operate on the same channel such that ebn0 18
q carrier modulation by digital signalsdigitally modulated signals with low-pass spectral characteristics can be transmitted directly through
q what do you mean by compandingin order to lower the crest factor of a waveform so as to produce better performance a process known as companding is
a symmetrical fluctuating message with ftmax 63 v and kcr 3 is to be encoded by using an encoder that employs an 8-bit natural binary code to
a uniform quantizer is said to have 16 levels and hence is called a midriser the saturation levels are to correspond to extreme values of the message
q describe about digital communication systemsfla digital signal can be deflned as having any one of a finite number of discrete amplitudes at any
q define wireless communicationsthe latest wireless communications technology is the personal satellite phone the coverage is planetary and one can
q advanced mobile phone systemcellular systems employed cells with a radius in the range of 5-18 km the base station usually transmitted at a power
q show television waveformthe television waveform representing one scan is illustrated in figure a blanking pulse with a duration of 018 of the