Assignment Booklet

B. Tech.in

Aerospace Engineering Programme

Sixth SemesterCourse Code Course Title

ET-524 Principles of Engineering Management and Economics

BAS-018 Aircraft Systems and Maintenance Engineering

BAS-019 Aircraft Instruments

BAS-020 Basic Control Theory

School of Engineering and TechnologyINDIRA GANDHI NATIONAL OPEN UNIVERSITY

Maidan Garhi, New Delhi-110 068

JANUARY 2012

BTAE

B. Tech in Aerospace Engineering

Dear Student,

As we explained in the Programme Guide for B. Tech in Aerospace Engineering, you will have to do one Tutor Marked Assignment (TMA) for each course.

You will find that the questions in the Assignments are analytical and descriptive so that you can better understand and comprehend the concepts.

Before you attempt the Assignments, please read the instructions carefully provided in the Programme Guide. It is important that you write the answer to all the TMA questions in your own words. Your answers should be in brief and to the point. Remember, writing answers to assignment questions will improve your writing skills and prepare you for the term-end examination.

You are to submit the assignments to the Coordinator of your Centre. You must obtain a receipt from the Centre for the Assignments submitted and retain it with you. It is desirable to keep a photocopy of the assignments submitted by you.

Once evaluated, the Centre will return the assignments to you. Please insist on this. The Centre will send the marks to the SR&E Division at IGNOU, New Delhi.

SubmissionYou need to submit the Assignments within the stipulated date for being eligible to appear in the term-end examination.

All Assignments are to be submitted by 31st March, 2012 to the Coordinator of the Centre allotted to you.

GUIDELINES FOR SUBMITTING THE ASSIGNMENTS

We expect you to answer each question as per instructions in the assignment. You will find it useful to keep the following points in mind :

PlanningRead the assignment carefully; go through the Units on which they are based. Make some points regarding each question and then rearrange them in a logical order.

OrganisationBe a little selective and analytical before drawing up a rough outline of your answer. Give adequate attention to question’s introduction and conclusion.

Make sure that

(a) The answer is logical and coherent.

(b) It has clear connections between sentences and paragraphs.

(c) The presentation is correct in your own expression and style.

PresentationOnce you are satisfied with your answer, you can write down the final version for submission. It is mandatory to write the assignment neatly in your own handwriting. If you so desire, you March underline the points you wish to emphasize. Make sure that the answer is within the stipulated word limit.

(Ms. Sweata Tiwari)Programme Coordinator

2

Q.1 (a) Define coordination. How can it be achieved? Explain the four classical principles to achieve vertical coordination.

(b) Why is it important that managers understand the relationship between the various stages of a product’s life cycle and the different types of processes that are available for manufacturing that product?

Q.2 (a) What are the different ways in which technology can impact an operation? Use examples in both manufacturing and service operations.

(b) Explain with the help of neat sketches functional, project and matrix organizations.List out the advantages and disadvantages of each. How does a matrix organization combine the advantages of both functional and project form of organizations?

Q.3 (a) Discuss the decision making process. Under what conditions are the decisions made. Discuss the Brain storming technique for identification of alternatives in decision making process.

(b) What are the major differences between work measurement and work sampling? What are the objectives in each case?

Q.4 (a) What is acceptance sampling? Discuss with the help of a flow charts various types of sampling plans.

(b) There is a current trend to reduce inventories. How is this being accomplished and what is the impact of lower inventories to the firm, its suppliers and its customers?

Q.5 (a) Suppose you were asked to set up a cost control program for an established manufacturing firm of your own organization. Explain briefly, the steps you would feel were absolutely vital for such a program.

(b) What are the prime objectives of material handling? Describe the characteristics of conveyors, industrial trucks and cranes.

Q.6 (a) A person intends discharging a House loan debt through annual payment of Rs. 20,000/- at the end of each year over a period of three years with an annual discount rate of 20%. What would be the one time lump sum payment amount that can be made today?

(b) Select any of the following and discuss in detail the factors you will consider for the location :

(i) a thermal power plant,

(ii) a nuclear power plant,

(iii) a call centre, and

(iv) a mil processing plant.

3

TUTOR MARKED ASSIGNMENTET-524(A)

PRINCIPLES OF ENGINEERING MANAGEMENT AND ECONOMICS

Note : All questions are compulsory and carry equal marks.

Course Code : ET-524(A)Last Date of Submission : March 31, 2012

BTAE

Maximum Marks : 100Weightage : 30%

Q.7 (a) What do you understand by span of Control? Give any five factors influencing it. Calculate the number of relationships for 20 numbers of subordinates in span of control.

(b) Explain any five types of power that can be exercised in an organization, as per the concept given by French and Raaven.

Q.8 (a) Name any five types of popular contracts. Explain usual steps in a contracting procedure.

(b) What are the reasons for the successful application of robots in a large engineering project, in your own organization.

Q.9 (a) Differentiate the characteristics of a Bureaucratic organization, a mechanistic structure and an organic structure in a tabular form giving at least five points in each.

(b) Discuss various types of ‘schedules’ and ‘status reports’ for time and cost control of projects.

Q.10 Write short notes on the following :

(i) Statistical Quality Control

(ii) Managerial Grid

(iii) Job enrichment

(iv) Span of control

(v) Cost of quality.

4

TUTOR MARKED ASSIGNMENTBAS-018

AIRCRAFT SAFETY AND MAINTENANCE ENGINEERING

Note : All questions are compulsory and carry equal marks.

Course Code : BAS-018Last Date of Submission : March 31, 2012

BTAE

Maximum Marks : 100Weightage : 30%

Q.1 (a) Define special inspection of aircraft components. What are the precautions to be taken while loading compressed air?

(b) Briefly describe an Airworthiness directive. Also describe the different types of publications used in aircraft maintenance as per the CAR.

Q.2 Why is environmental cleanliness required in aviation? How is it maintained?

Q.3 (a) What is rigging of an aircraft? What are the precautions to be taken while parking an aircraft?

(b) What are aircraft logs? What are the guidelines for issuance of Airworthiness certificates?

Q.4 Describe the four steps of Statistical Process Control (SPC) in aircraft health monitoring.

Q.5 What are the various aerospace sensors used for data acquisition for the purpose of monitoring aircraft structural health? Explain the functioning of any two.

Q.6 What is Non Destructive Testing (NDT)? What kinds of NDT techniques are used to ensure safety of an airplane?

Q.7 What are the responsibilities laid out in Air Safety Circulars for ensuring correct refueling? What are the aircraft operator’s and fuel vendor’s responsibilities in this regard?

Q.8 Explain the starting procedure of an aircraft jet engine.

Q.9 What is aircraft proximity? How has aircraft proximity been classified in Air Safety Circular?

Q.10 What are the stages in a system life cycle? On what basis is aircraft component life decided?

5

Q.1 Choose the correct answer from the given four alternative :

(a) The error suffered by air data Instrument’s that is caused by manufacturing tolerances is known as :

(i) Pressure error

(ii) Lag

(iii) Position error

(iv) Instrument error

(b) Which of the following is correct :

(i) Static Pressure = Pitot Pressure + Dynamic Pressure

(ii) Dynamic Pressure = Pitot Pressure + Static Pressure

(iii) Pitot Pressure = Dynamic Pressure – Static Pressure

(iv) Dynamic Pressure = Pitot Pressure – Static Pressure

(c) The Basic Requirement of a Direct – Reading Magnetic compass is :

(i) Horizontality, rigidity and sensitivity

(ii) Sensitivity, rigidity and a periodicity

(iii) Horizontality, sensitivity and a periodicity

(iv) A periodicity, sensitivity and a rigidity

(d) A Directional Gyro is most likely to suffer from gimbal error when :

(i) Manoeuvring on heading’s other than cardinal headings

(ii) Flying straight and level on cardinal heading’s

(iii) Manoeuving on cardinal heading’s

(iv) In a steady climb or descent on a non-cardinal heading.

(e) In Pitot static system, Pitot line is connected to:

(i) Air speed indicator only

(ii) Altimeter only

(iii) Vertical speed indicator only

(iv) For all the above three instrument’s

6

TUTOR MARKED ASSIGNMENTBAS-019

AIRCRAFT INSTRUMENTS

Note : All questions are compulsory and carry equal marks.

Course Code : BAS-019Last Date of Submission : March 31, 2012

BTAE

Maximum Marks : 100Weightage : 30%

(f) Elements of an Instrument are :

(i) Measuring element’s and Detecting elements.(ii) Coupling element’s and indicating element’s

(iii) Measuring element’s and indicating element’s(iv) (i) and (ii)

(g) Proximity switch is used in :(i) Freight door indication

(ii) Fuel quantity indication(iii) Temperature indication

(iv) Hydraulic Pressure indication(h) KNOT is the unit of :

(i) speed(ii) height

(iii) bearing(iv) width

(i) The indicated air speed of an Aircraft is:(i) Directly Proportional to air density

(ii) Inversely Proportional to air density(iii) Not affected by changes in air density

(iv) (i) and (ii)(j) Which of the following is not an Engine instrument?

(i) CHT(ii) EGT

(iii) EPR(iv) OAT

Q.2 Describe the principle of operation of an Air speed indicator in an aircraft with a neat sketch. What do you understand by square law compensation of airspeed indicator? Discuss the error’s to which an airspeed indicator is prone to.

Q.3 Explain the principle of operation of an instrument used for fuel flow measurement in an Aircraft.

Q.4 Explain with a sketch the measurement of Engine speed.

Q.5 Explain with Diagram the salient features of a fuel gauging system used in a Modern Aircraft.Q.6 What is a turn indicator? Explain with a sketch it’s principle of operation.

Q.7 Write short notes on the following :(i) Flux meter

(ii) Air speed indicator(iii) Magnetic compass

Q.8 Write short notes on the following:(i) RMI

(ii) Artificial horizon(iii) Magnetic Indicator

Q.9 Describe how a rate gyroscope March be utilized to sense both banking and rate of turn.

Q.10 Describe in brief the flight detector system.

7

Q.1 Choose the correct or the best alternative in the following :

(a) The time constant of the second order system

is : _________________

(i) 0.2 s

(ii) 12 s

(iii) 60 s

(iv) 10 s

(b) The Basic circuit of Figure 1 represents a :

Figure 1

(i) lag compensator

(ii) lead compensator

(iii) lag-lead compensator

(iv) lead-lag compensator

(c) The steady-state error of a feedback control system with an Acceleration input becomes finite in a

(i) type 0 system

(ii) type 1 system

(iii) type 2 system

(iii) type 3 system

8

TUTOR MARKED ASSIGNMENTBAS-020

BASIC CONTORL THEORY

Note : All questions are compulsory and carry equal marks.

Course Code : BAS-020Last Date of Submission : March 31, 2012

BTAE

Maximum Marks : 100Weightage : 30%

(d) The Laplace transform of sin 2 t is ____________

(i)

(ii)

(iii)

(iv) None of the above(e) The impulse response of a LTI system is a unit step function, then the corresponding

transfer function is(i) 1/s(ii) 1/s2

(iii) 1(iv) s

(f) If the NYQUIST plot of the loop transfer function G (s). H (s) of a closed-loop system encloses the ( 1 Jo) point in the G (s) H (s) plane, the gain margin of the system is(i) zero(ii) greater than zero(iii) less than zero(iv) infinity

(g) The LVDT is primarily used for the measurement of (i) Displacement(ii) Velocity(iii) Acceleration(iv) Humidity

(h) The input to a controller is :(i) Sensed signal(ii) Desired variable value(iii) Error signal(iv) Servo signal

(i) Closed loop transfer function of a unity feedback system is given by steady

state error to unit ramp input is(i) (ii) (iii) 1(iv) 1/

(j) Electrical time constant of an Armature-controlled DC servomotor is(i) equal to mechanical time constant(ii) smaller than mechanical time constant(iii) larger than mechanical time constant(iv) not related to mechanical time constant.

Q.2 Write the Dynamic equation in respect of the mechanical system given Figure 2 then using force voltage Analogy obtain the equivalent electrical network.

Legend : K1 K2 Spring constant’s

B1 – viscous friction damping coefficient

9

M1, M2 – inertial constant of masses

X1, X2 – Displacement’s;

f (t) – force

Figure 2

Q.3 The open loop transfer functions of three system are given as :

(a)

(b)

(c)

(i) Determine respectively the positional velocity and acceleration error constant’s for these systems. Also for the system given in.

(ii) Determine the steady state error’s with step input r (t) = u (t), Ramp input r (t) = t and

Acceleration input .

Q.4 The Block Diagram of a Remote Position control of a ship’s Rudder is given in the Figure 3, write the overall transfer function and determine the Damping Ratio and the natural frequency n of the system.

Figure 3

Q.5 The characteristic equation of a closed loop control system is given as . For this system, determine the number of root’s to the right

of the vertical axis located at s = 2.

Q.6 Draw the complete NYQUIST plot for a unity feedback system having the open loop function

from this plot obtain all the information regarding absolute as well

as relative stability

10

Q.7 Sketch the Root locus diagram for a unity feedback system with it’s open loop function as

. Thus find the value of K at a point where the complex

poles provide a damping factor of 0.5.

Q.8 Consider a unity feedback control system with the following open-loop transfer function

. Determine the value of the gain K such that the phase margin

is 50 . What is the Gain margin for this case?

Q.9 Use the NYQUIST criterion to determine the range of value of K > 0 for the stability of the system in Figure 4.

Figure 4

Q.10 Describe in brief the proportional controller, proportional integral controller and proportional integral differential controller with the help of suitable diagrams.

11