Estimate the natural frequency and damping factor, Computer Engineering

Assignment Help:

On the Moodle site just below the assignment you will find data from a slow sine sweep test conducted on a car on a "four-post" road simulator for the frequency range 0 to 20 Hz in the EXCEL spreadsheet "Ride_Comfort_Data".   The response has been measured vertically on the seat rail of the driver's seat while the front two actuators moved up and down in phase and the rear actuators remained at rest.  The amplitude of the actuator motion was such that the velocity amplitude was constant throughout the frequency sweep at 100 mm/s.  The response amplitude at the seat rail is measured in g.

(a)  Obtain the transmissibility between the input motion of the actuators as a single input and the motion of the seat rail.  Provide a graph from EXCEL showing the transmissibility.

(b)  The transmissibility in (a) does not tend to 1 at low frequency as might be expected for an ideal one degree of freedom system.  Explain this.

(c)  Estimate the natural frequency and damping factor for the sprung mass mode involving motion of the body on the front suspension.

(d) If the diameter of the front tyres of the car is 0.6 m estimate the car speed in kph which would cause an "engine shake" problem in the car.  (This will require you to identify the frequency for the engine shake mode from your graph.)                                           

(e)  In road tests on a relatively flat test track surface at 80 kph with one front wheel deliberately unbalanced, the idle shake at the seat rail position, measured using an accelerometer, was 4.2 g rms.  The other three wheels were in almost perfect balance.  What displacement amplitude and frequency of the front two actuators of the road simulator would be necessary to achieve the same seat rail motion in the laboratory?                                                                                                                         


Related Discussions:- Estimate the natural frequency and damping factor

Define the object orientation and its analysis, Object Orientation and Anal...

Object Orientation and Analysis An Object is anything that exists within the problem domain that can be recognized by data and/or behaviour. An example of an object is a bike.

Human–computer interaction, In the view of the M364 module team, HCI has be...

In the view of the M364 module team, HCI has been superseded by ID. This is because HCI traditionally concentrated upon desktop computers with single users, whereas ID includes the

Communications between r/3 and external applications, What is the means of ...

What is the means of communications between R/3 and external applications? The means of communication among R/2,R/3 and external applications is by the CPI-C handler or SAP Gat

Ip fragmentation of user datagarm, IP specified that datagram can arrive in...

IP specified that datagram can arrive in a different order than they were sent. If a fragment from one datagram arrives at a destination before all the segments from a previous dat

What do you mean by true complement method, Q. What do you mean by True Com...

Q. What do you mean by True Complement Method? Explain in detail. Q. Show IEEE format for (12.75)10. Q. What are the various ways to represent Negative Numbers in computer sy

Explain the language processors, Name the language processors are? Asse...

Name the language processors are? Assembler, Compiler and Interpreter are the language processors.

What do you mean by complexity of an algorithm, What do you mean by complex...

What do you mean by complexity of an algorithm? The term complexity is used to define the performance of an algorithm. Typically performance is calculated in terms of time or s

Serial port communication, The 68HC11F1 has two types of serial ports namel...

The 68HC11F1 has two types of serial ports namely asynchronous (SCI) and synchronous (SPI). The most common form of communication device used in control is the SCI as this provides

Explain the working of a 4-bit SISO shift register, Using D-Flip flops and ...

Using D-Flip flops and waveforms explain the working of a 4-bit SISO shift register. Ans. Serial In-Serail Out Shift Register: Fig.(a) demonstrates a 4 bit serial in-serial out

Prolog programming language, Prolog Programming Language : Probably pr...

Prolog Programming Language : Probably programming languages are procedural: than the programmer specifies exactly the right instructions (algorithms) required to get an agent

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd