PID1.Please give the discrete PID algorithm, in increment form u(k)=u(k-1)+ △u(k). Show(过)l.accroding to statistics, please tell which one is the main reason that cause a control system shutdowm, controllers, sensors or actuators?actuators2 .When we install a control value in practical industries, why we usually instell a bypass line? Draw the diagram.It can make the system more simple, flexible, and it also can protect the system3 .Why pracess engineers always perfer DSC or PLC to miero-chip units, such as a single chip computer? Please give at least 2 reasons.The cost is low, safety performance is good4 .Someone think when valve 's opening is 30%,then the flowrate is 30% of the maximum flowrate, what do you think.Depending on the valve, minimum flow cases, valve opening can not be lower than 15%5.We always use 4-20mA other than 1-5V for signal interface in process control field?Because the distance between scene and control room is too far , so it will produce a larger error ,.if we use this signal system, we can improve the transmission accuracy.△ u(k).2.In which conditions can we consider tu use derivative action? Give at least 2 point.Large overshoot, reaction speed slowly3.What is most typical transfer function to dercribe an industrial process? What is the intergral time if you tune a PI controller for this kind of process?CSTR1.The original temperature control system is designed only by mainpulating the jacket in let valve opening. Please point ont its problems when applied in real prectice, at least 2 point.Radiator pipe line, solar heating system2.If the jacket intlet pressure fluctuates greatly, how to deal with this problem? Draw schematic.Voltage regulator valve at the exit of a flow-limiting valve with a trachea string to use3.If the Tjm fluctuates from time to time, show you inproved design. Draw control blook.Feed forawrd1.what's the necessary condiction for feed forward control.Measurable and uncontrollability of disturbance quantity2.In the following diagram where gmf(s)=1/(s+1),gm(s)=1,gs(s) is a PI controller, and gc(s)=2+2/s, gd(s)=eA(-2s)/s(s+1), gp(s)=1.5eA(-1.5s)/(3s+1), show gcf(s).3.Let's come back to problem 3,discussed abne, if the process fluid into CSTR. Fi cannot be controlled stable, whlie its fluctuations greatly influence the temperature, how to deal with. Please draw schematic diagram.Safety1. Split range control is employed, for tank pressure control as shown in florring, air-open?2. Draw the valves working type, show the diagram.23yi(s)5s 2 5s 1Ui(s)y2(s)_26_U2(s)RGA13s 16s 33. How to pair the inputs and outputs to control the above problem.-40 414. RGA,deal process41 40DMC1 .DMC advantage and disadvantageThe cost is low, safety performance is good2 .Give the predicted current output. if U(k 1) 1, U(k 2) 0.8, U(k 3) 0.5,U(k 4)0.6....FSR...N0.2,0.15,0.7,0.8,0.9,0.9,0.93 .tune PMN,criteria. P,M,N and ample time AT。