Question 1 Figure Q1 shows the structure of a closed loop control system: d(s) |u(s) sp(s)- K(s) G(s) y(s) Figure Q1 a)

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Question 1 Figure Q1 Shows The Structure Of A Closed Loop Control System D S U S Sp S K S G S Y S Figure Q1 A 1 (51.21 KiB) Viewed 11 times

Question 1 Figure Q1 shows the structure of a closed loop control system: d(s) |u(s) sp(s)- K(s) G(s) y(s) Figure Q1 a) Show that the transfer function for the above system is given by x(+) G(s)K(s) (1+G(e)k (s) sp (s) + (1+4 ()x (51) 4 (6) G(s) (1+G(s)K(s)) b) One of the main requirements of a control system is to ensure that it rejects all 'disturbances' - which is shown in Figure Q1 as d(s). i) Determine the conditions the controller K(s) must satisfy, for any system G(s), so that this objective can be satisfied. ii) How does this choice of controller affect the response of the system to any set point, sp(s), changes it experiences? c) The above control system is to perform as part of a SCADA system. The controller is to be implemented in a control office which is remote from the actual plant. The plant itself uses a local Bus architecture for connection to the sensors and actuators. i) Sketch a structure that could achieve the above and clearly identify any equipment needed. ii) Name two advantages of using a Bus architecture. iii) Collision avoidance is required and is implemented using CSMA/CD (Collision Sense Multiple Access/Collision Detection). Briefly explain how this works.