Control systems electrical engineering pdf

EE - Control Systems. Last edited by a moderator: Aug 8, Points 1 Location Delhi Student of Engineering. Just downloaded it - will let you know how my exam goes. I am back! I strongly recommend to study from this. Which of the following should be done to make an unstable system stable? As a result of introduction of negative feedback which of the following will not decrease? Regenerative feedback implies feedback with a oscillations b step input c negative sign d positive sign Ans: d. The output of a feedback control system must be a function of a reference and output b reference and input e input and feedback signal d output and feedback signal Ans: a.

A control system with excessive noise, is likely to suffer from a saturation in amplifying stages b loss of gain c vibrations d oscillations Ans: a. Zero initial condition for a system means a input reference signal is zero b zero stored energy c ne initial movement of moving parts d system is at rest and no energy is stored in any of its components Ans: d.

Transfer function of a system is used to calculate which of the following? The band width, in a feedback amplifier. On which of the following factors does the sensitivity of a closed loop system to gain changes and load disturbances depend? The transient response, with feedback system, a rises slowly b rises quickly c decays slowly d decays quickly Ans: d.

The second derivative input signals modify which of the following? Which of the following statements is correct for any closed loop system? Which of the following statements is correct for a system with gain margin close to unity or a phase margin close to zero? Due to which of the following reasons excessive bond width in control systems should be avoided?

In a stable control system backlash can cause which of the following? In an automatic control system which of the following elements is not used? In a control system the output of the controller is given to a final control element b amplifier c comparator d sensor e none of the above Ans: a. A controller, essentially, is a a sensor b clipper c comparator d amplifier Ans: c. Which of the following is the input to a controller? The capacitance, in force-current analogy, is analogous to a momentum b velocity c displacement d mass Ans: d.

The temperature, under thermal and electrical system analogy, is considered analogous to a voltage b current c capacitance d charge e none of the above Ans: a. In electrical-pneumatic system analogy the current is considered analogous to a velocity b pressure c air flow d air flow rate Ans: d. In liquid level and electrical system analogy, voltage is considered analogous to a head b liquid flow c liquid flow rate d none of the above Ans: a.

The viscous friction co-efficient, in force-voltage analogy, is analogous to a charge b resistance c reciprocal of inductance d reciprocal of conductance e none of the above Ans: b. In force-voltage analogy, velocity is analogous to a current b charge c inductance d capacitance Ans: a. In thermal-electrical analogy charge is considered analogous to a heat flow b reciprocal of heat flow c reciprocal of temperature d temperature e none of the above Ans: d.

Mass, in force-voltage analogy, is analogous to a charge b current c inductance d resistance Ans: c. The transient response of a system is mainly due to a inertia forces b internal forces c stored energy d friction Ans: c. A signal other than the reference input that tends to affect the value of controlled variable is known as a disturbance b command c control element d reference input Ans: a.

The transfer function is applicable to which of the following? From which of the following transfer function can be obtained? Xiang Yin receives honorable mention for ProQuest Distinguished Dissertation Award Yin researched cyber-physical systems and discrete-event systems.

Sijia Geng awarded Towner Prize for Distinguished Academic Achievement A PhD student in electrical engineering, Geng researches trajectory sensitivity and renewable energy in microgrids.

Necmiye Ozay receives ONR Young Investigator Award to advance research in autonomous systems Research will focus on how autonomous vehicles adapt to wide-ranging changes.

Getting people moving — Walking exoskeletons could mobilize disabled patients Prof. Jessy Grizzle has long said that his work in robotics could one day be used to help the disabled.

Now he and his group, alongside French company Wandercraft, are working to make that claim a reality in the form of walking exoskeletons. Latest two-legged walking robot arrives at Michigan Built to handle falls, and with two extra motors in each leg, the new robot will help U-M roboticists take independent robotic walking to a whole new level.

Necmiye Ozay receives Nonlinear Analysis: Hybrid Systems paper prize The authors demonstrated that it is possible to synthesize provably-correct robust feedback controllers that can handle various types of imperfections in the models or measurements.

Building more stable four-legged robots A biologist turned roboticist takes a closer look at dog gaits to help design better movements for four-legged robots. Words: 1, Pages: 9.

Choose the correct answer from the answer options. Questions 1, 2 and 3 concern the following symbol, which describes a directional control valve.

With the push-button not pressed: i Pressure is applied to port 4. Which option BEST describes the two statements?

When the push-button is pressed: i Pressure is applied to port 4. After pressing the push-button it is released, then: i Pressure is applied to port 2.