1. In tracking control system the control effort must is: a. Minimum value b. Zero value c. Maximum value d. Any value 2. In 2nd order system based on LQR controller technique. Increasing the value of the element q21 in the Q matrix leads to a. Reduce the rise time of the system response. b. Increase the rise time of the system response. c. Reduce the input signal of the system. d. Increase the input signal of the system. e. None of all above. 3. The stability of the plant depands on its: a. Gain matrix. b. Sate matrix. c. Input matrix. d. Control effort. e. All above. 4. In control systems, there are problems. a. two b. three c. four d. five types of optimal control

Resistive displacement sensor is: a. transduces that containing resistant that slides against another fixed resistive element. O b. electromechanical device containing an electrically conductive wiper that slides against a fixed resistive element. c. electromechanical device containing an electrically capacitive wiper that slides against a fixed element. d. mechanical device containing wiper that slides against a fixed resistive element.

Choose the correct statements. Select one or more: a. Specific energy expressed with SI base units is J/K. Ob. Dynamic model of a measurement element with second order system dynamics can be expressed with block diagram using only scalar multiplication blocks. c. Feedback can make stable system unstable. Od. A Pl-controller is a controller with four parameters (proportional gain, integration time, derivate time and derivate filter). e. Second order system is a system that's step response oscillates when it have (underdamped) complex valued poles. Of. A thermocouple is one example of non-linear type of sensors. Og. Drift and non-linearity are wanted properties for sensors. Oh. Measurement uncertainty is only caused by external sources. Oi. A Bode diagram is a graphical representation of frequency response that consist of two separate plots (one for magnitude and other one for phase). Oj. A filter is one example of functionality that can be part of signal processing element.

Discuss the differences between group collective control system and destination control system.