95上控制系統期&au

95上控制系統期&au

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: axesaaeealaés seawater»? 11/22/2006 Control Systems Midterm Examination 1. A control system basically consists of functional blocks of plant, controller, actuator, sensor, comparator, etc. Using the above mentioned blocks, (a) Please plot the signal flow graph of a closed-loop control system with the input and output marked. (5%) ' (b) Please plot the signal flow graph of an open—loop control system with the input and output marked. (5%) (0) Please describe the pros and cons of the closed—loop control system to the open—loop control system. (Itemized description preferred.) (15%) 2. Consider the system in Figure l, where 1 and D(s)=K(S+1) 3(5 +12) (5 +10) (a) Find K and p so that the third-order closed-loop system has a 10% overshoot to a step input and a 2% settling time of 1.55ec. (15%) (b) Please verify your design in (a) with a reasonable statement or numerically. 3 (3(5) = / -J " 4, 0 ) 3’ e " 1‘ /,./ _, 4,5“; L t, {’VNV‘: ~ "'4: '7‘, \I ;( ~74< 21-; ; ’ 5' 3' " 1‘ ~‘7 ’ a . t as". V l A, y “ (\172/ l, 3 " ‘ g, '1); xv: .l ‘</ < / / \1 {L - a, z a n u —A i 1’7 ,,4r " 3. An electromechanical open-loop control) system is shown in Figure 2. The generator, driven at a constant speed, provides the field voltage for the motor (vg = Kg if). The motor has inertia JM, bearing frictionfM and constant armature current (TM = K, ig). The load has inertia JL and bearing fiictionfL. The ouput is (0. Assume that R =Rg + Rf, L = Lg + Lf, J: JM+ anL,f=fM+ anL, obtain the N Gear ratio :1 = —‘ neaiaxenalaeamiiaanea“ v v- ' 11/22/2006 FigureZ (a) Please derive its dynamic equations ( with state variables if, ig, a), 67), (10%) (b) Please derive the transfer function 6’ (s) / Vf(s), (5%) (c) Please derive the State variable model i : Ax + Bu, y = Cx (with state vectorx = [if z'g 6’ col). (5%) (d) Obtain the transfer function G(s) from the state equation in (c). (5%) 4. The design process of a control system consists of many stages such as controller design, modeling of plant, selection of actuator, system architecture design, system simulation, spec. verification, etc. (a) Please describe the design process of a control system in a block diagram with feedback loops. (l5%) (b) In your opinion, what will be the most important step in the design process and Why? (5%) 5. (a) Please describe the basic idea of the Ziegler—Nicole’s tuning methods. (10%) (b) How do we use the methods inPlD control design? (5%) 6. Integrator Windup is a common problem in PID controller design. (a) Please describe the cause of the phenomenon. (lO%) (b) Please describe the solution of the phenomenon. (5%) 'H'lL/‘V' "Inu'H’r': ...
View Full Document

Page1 / 2

95&auml;&cedil;Š&aelig;Ž&sect;&aring;ˆ&para;&ccedil;&sup3;&raquo;&ccedil;&micro;&plusmn;&aelig;œŸ&au

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online