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

1 sketch the deformation of a fluid element for the

1. Sketch the deformation of a fluid element for the following cases: 2. For a two-dimensional, incompressible flow with velocity v x  = v x (y), sketch a three-dimensional fluid element and illustrate the magnitude, dir ...

1 a square gate 4 m by 4 m is located on the 45deg face of

1. A square gate, 4 m by 4 m, is located on the 45° face of a dam. The top edge of the gate is 8 m below the water surface. Determine the resultant force of the water on the gate, and the point through which it acts. 2. ...

A fan draws air from the atmosphere through a 030-mdiameter

A fan draws air from the atmosphere through a 0.30-mdiameter round duct that has a smoothly rounded entrance. A differential manometer connected to an opening in the wall of the duct shows a vacuum pressure of 2.5 cm of ...

1 according to the equipartition principle what is the

1. According to the equipartition principle, what is the overall energy in J of one mole of water at 1000 K if translational, rotational, and vibrational degrees of freedom are considered? 2. How many equipartition degre ...

Suppose that you measured the product pv of 1 mol of a

Suppose that you measured the product PV of 1 mol of a dilute gas and found tha PV = 24.35 L atm at 0.00°C and 33.54 L atm at 100.°C. Assume that the ideal gas law is valid, with T = t(°C) + a and that the values of R an ...

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 ( ...

1 a venturi meter with an inlet diameter of 06 m is

1. A Venturi meter with an inlet diameter of 0.6 m is designed to handle 6 m3 /s of standard air. What is the required throat diameter if this flow is to give a reading of 0.10 m of alcohol in a differential manometer co ...

Calculate the first-order correction to the energy of a

Calculate the first-order correction to the energy of a ground-state harmonic oscillator subject to an anharmonic potential of the form ax 3 +bx 4 where a and b are small (anharmonicity) constants. Consider the three cas ...

At the end of a water pipe of 3-in diameter is a nozzle

At the end of a water pipe of 3-in. diameter is a nozzle that discharges a jet having a diameter of 1½ in. into the open atmosphere. The pressure in the pipe is 60 psig (pounds per square inch gage), and the rate of disc ...

A water jet pump has an area ajnbsp 006 ft2nbspand a jet

A water jet pump has an area A j  = 0:06 ft 2  and a jet velocity v j  = 90 fps, which entrains a secondary stream of water having a velocity v s  = 10 fps in a constant-area pipe of total area A = 0.6 ft 2 . At section ...

  • 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

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

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