By Farid Golnaraghi, Benjamin C. Kuo
Computerized keep an eye on structures offers engineers with a clean new controls booklet that locations unique emphasis on mechatronics. It follows a progressive process by means of really together with a actual lab. additionally, readers will locate authoritative assurance of recent layout instruments and examples. present mechatronics purposes construct motivation to profit the fabric. vast use of digital lab software program is usually built-in during the chapters. Engineers will achieve a robust comprehend of regulate structures with assistance from glossy examples and routines.
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Additional info for Automatic Control Systems
Draw the 20-dB/decade (or 6-dB/octave) line and the horizontal line at 0 dB, with the two lines intersecting at co = l / T . 3. If necessary, the actual magnitude curve is obtained by adding the errors to the asymptotic plot at the strategic frequencies. Usually, a smooth curve can be sketched simply by locating the 3-dB point at the corner frequency and the 1-dB points at 1 octave above and below the corner frequency. The phase of G(jco) = 1 + jcoT is /G( jco) = tan"' coT (2-79) Similar to the magnitude curve, a straight-line approximation can be made for the phase curve.
Several typical control-system examples were given to illustrate the analysis and design of control systems. Most systems encountered in real life are nonlinear and time-varying to some extent. The concentration on the studies of linear systems is due primarily to the availability of unified and simple-to-understand analytical methods in the analysis and design of linear systems. REVIEW QUESTIONS 1. List the advantages and disadvantages of an open-loop system. 2. List the advantages and disadvantages of a closed-loop system.
2-61) and set.? 2co) (2-93) Eq. (2-92) shows that G(jco) has corner frequencies at co = 2, 5, and 10 rad/sec. The pole at s = 0 gives a magnitude curve that is a straight line with a slope of —20 dB/decade, passing through the co = 1 rad/sec point on the 0-dB axis. The complete Bode plot of the magnitude and phase of G( jco) is obtained by adding the component curves together, point by point, as shown in Fig. 2-18. The actual curves can be obtained by a computer program and are shown in Fig. 2-18.
Automatic Control Systems by Farid Golnaraghi, Benjamin C. Kuo