Ask Question, Ask an Expert


Ask Mechanical Engineering Expert


Section 1

An antenna shown in Figure is to be adjusted from its current position to a new desired position through turning a potentiometer at an angle θi(t). The potentiometer converts the angular displacement in voltage. Another potentiometer is employed to convert the angular position of the antenna in voltage which then serves as a feedback system. The differentiation between the voltage outputs from the two potentiometers is amplified in two stages to supply a proper voltage level to a motor driving antenna. The system normally operates to drive the error to zero i.e. when the input and output voltages (produced through the potentiometers) are equivalent, the error will be zero and consequently the motor receives no voltage and halts to drive the antenna. In this control process, apply the six (6) steps to model and analyse the given system by which the following items shall be subsequently produced.

a) Block diagram
b) Schematic diagram
c) Simplified diagram 
d) The transfer function of the system θ0 (s)/θi (s)
e) The plots of the system responses while working on the design analysis.
f) Discussion on the following cases:

i. If the gear diameter attached to the antenna is increased, what is the effect on the system response and why? 
ii. If the system is ensured to be always stable and that the steady-state error is kept at zero, what are the appropriate measures? 
iii. If strong wind strikes unequally across the face of the antenna plate, how will it affect the response of the system? What is the appropriate method to overcome a problem it creates?

Note: for the above three cases, prove your explanation and illustration with appropriate evidences in terms of numerical values and plots.

Section 2

Design a compensator such that the step response of the system yields the following changes:

• The percent overshoot shall be reduced by 50%
• The settling time shall be reduced to 3.0 sec.

Note: Should you not be able to satisfy the given specification with one type of controller, you may use other type. Any particular technique in the design procedures is left for you to decide. You must produce all the evidences of your work in the form of numerical values and plots.

931_layout of atenna.jpg

Parameter Name                         Value
Differential Amplifier gain:              2
Power amplifier Gain:                   100
Power amplifier frequency shift :    50
Armature Resistance:               10 k Ω
Rotor Inertia:                       0.03 kg-m2
Rotor damping:                 0.02 N.m s/rad
Load Inertia:                          4 kg-m2
Load damping:                    2 N.m s/rad
Back emf constant:                1 V.s/rad
Motor Torque Constant:          1 N.m/A
Gear 1 number of Teeth:             40
Gear 2 number of Teeth:           200
Gear 3 number of Teeth:           250
Input Potentiometer Gain:         2.0
Output potentiometer Gain:      1.5



prepare a report of minimum 20 pages covering the following content:

• Introduction           
• Derivation of the system model                  
- Differential Equation
- Laplace transform 
- Transfer function 
• Analysis of the system response  
- Manual calculation
- Simulation result
- Discussion of the simulation results
- Illustration and discussion on the case problems
• Control Design and Analysis                  
• Conclusion

Mechanical Engineering, Engineering

  • Category:- Mechanical Engineering
  • Reference No.:- M91216

Have any Question? 

Related Questions in Mechanical Engineering

A steel bar of 100mm length tapers from 12mmtimes10mmfrom

A steel bar of 100mm length tapers from 12mm×10mmfrom one end to 30mm×20mm at the other. If the stress in the bar is not to exceed 100mpa,find the magnitude of the axial force. Also find the change in its length. Take E ...

Midterm examinstruction by default the graduate students

Midterm Exam Instruction: By default, the graduate students are required to answer all the question below. Question 1 part a) and Question 5 are not required for undergraduate students but are bonus problem for undergrad ...

Q1 a list three classical methods of optimization in

Q1) a) List three classical methods of optimization in engineering design. b) Describe the type of finite elements used to solve 3 dimensional problems in solid mechanics. Supply examples of the application. c) Describe ...

1 concrete rocks and bone are strong in compression and are

1. Concrete, rocks, and bone are strong in compression and are usually designed for compressive loading. To test their strength in compression, what sort of test specimen would be useful? 2. Suppose that a downward force ...

1 what is the pressure panbspin the figure the specific

1. What is the pressure p A  in the figure? The specific gravity of the oil is 0.8. 2. Find the difference in pressure between tanks A and B, if  d 1 = 2ft, d 2 = 6 in., d 3 = 2.4 in., and d 4 = 4 in. 3. What is the pres ...

An isotopically enhanced sample has ndi moles of deuterated

An isotopically enhanced sample has nDI moles of deuterated hydrogen iodide and nHI moles of common HI at 398 K. Comparison of the infrared intensities of the v = 1 S 2 transition inds a ratio of 0.100 for DI molecules ( ...

Some experimental data for shearing stress tau and shear

Some experimental data for shearing stress τ and shear strain rate γ obtained for a particular non-Newtonian fluid at 80?F are shown below. Please plot these data and fit a second-order polynomial to the data using graph ...

The jet pump injects water at v1nbsp 40 ms through a 76 cm

The jet pump injects water at V 1  = 40 m/s through a 7.6 cm pipe and entrains a secondary flow of water V 2  = 3 m/s in the annular region around the small pipe. The two flows become fully mixed downstream, where V 3  i ...

Consider the phase diagram for 4hea how many phases are

Consider the phase diagram for 4He a. How many phases are shown? b. How many triple points are shown? c. What is the boiling point of helium at 0.01 bar? d. What are the possible phase transitions?

Rework problem if the exit velocity profile is given bywhen

Rework Problem. if the exit velocity profile is given by when y is measure vertically from the center line of the water tunnel. Problem A two-dimensional object is placed in a 4-ft-wide water tunnel as shown. The upstrea ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen