Control Systems The impulse response of a system is c(t) = -te-t + 2 e-t (t>0). Its closed loop transfer function is (2s+1)/s² (2s+2)/(s+1)² (2s+1)/(s+1)² (2s+2)/s² (2s+1)/s² (2s+2)/(s+1)² (2s+1)/(s+1)² (2s+2)/s² ANSWER DOWNLOAD EXAMIANS APP
Control Systems The phase of lead compensator of the system G ( s ) = ( s + a ) / ( s + b ) is at its maximum at: √( a / b). a / b. ab. √( ab ). √( a / b). a / b. ab. √( ab ). ANSWER DOWNLOAD EXAMIANS APP
Control Systems The unit step response of the system is 1 - e-t(1+t). Which is the system? critically stable stable unstable oscillatory critically stable stable unstable oscillatory ANSWER DOWNLOAD EXAMIANS APP
Control Systems A system has poles at 0.01 Hz, 1 Hz and 80 Hz; zeros at 5 Hz, 100 Hz and 200 Hz. The approximate phase of the system response at 20 Hz is 90° -180° -90° 180° 90° -180° -90° 180° ANSWER DOWNLOAD EXAMIANS APP
Control Systems The transfer function of the system described by d²/dt²(y(t)) + 3d/dt(y(t)) + 2y(t) = 5u(t) with u(t) as input and y(t) as output is (s²+3s+2)/5 5/s(s²+3s+2) 5/(s²+3s+2) s(s²+3s+2)/5 (s²+3s+2)/5 5/s(s²+3s+2) 5/(s²+3s+2) s(s²+3s+2)/5 ANSWER DOWNLOAD EXAMIANS APP
Control Systems Certain control system has input u(t) and output c(t). If the input is first passed through a block having transfer function e-s and unit gain is applied to the applied to the system. The modified output will be c(t-1).u(t) c(t-1).u(t-1) c(t)u(t) c(t).u(t-1) c(t-1).u(t) c(t-1).u(t-1) c(t)u(t) c(t).u(t-1) ANSWER DOWNLOAD EXAMIANS APP
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