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

Differences between a database index and a match code, What are the differe...

What are the differences between a Database index and a match code? Match code can have fields from several tables whereas an index can have fields from only one table.

What do you mean by numbering and addressing, What do you mean by numbering...

What do you mean by numbering and addressing? Numbering and Addressing: In data networks and telephone, the end equipments are more frequently single units than multiple dev

Character and string processing instructions, Character and String Processi...

Character and String Processing Instructions: String manipulation usually is done in memory. Possible instructions comprise COMPARE STRING, COMPARE CHARACTER, MOVE STRING and MOVE

Add a byte number from one memory location, Add a byte number from one memo...

Add a byte number from one memory location to a byte from subsequent memory location and put sum in the third memory location. Also save carry flag in the least significant bit of

How to create a rollover image, Q. How to Create a Rollover Image? A ro...

Q. How to Create a Rollover Image? A rollover image is an image whose display changes when pointer passes ('rolls') over it. You will use Dreamweaver's Insert Rollover Image co

Algorithm to have a good best case running time, How can we change almost a...

How can we change almost any algorithm to have a good best case running time? Check whether the input constitutes an input at the very starting Or else run the original algo

Process of world wide web, Q. Process of World Wide Web? When you type ...

Q. Process of World Wide Web? When you type a URL in a web browser, this is what happens: 1. If URL contains a domain name, browser first connects to a domain name server an

What is the difference among save and save as, Use SAVE when you are revisi...

Use SAVE when you are revising an existing document. Use SAVE AS when you are making a new document from scratch or an existing document. This will remain the original document

Microprocesseor, In8085 are of the following statements is not true.A) Co-p...

In8085 are of the following statements is not true.A) Co-processor is interfaced in max mode. B) Co-processor is interfaced in MIN mode C )Co-processor is interfaced in max/min mod

Ethernet 10 base 2 is an example of which topology, Ethernet 10 Base 2 is a...

Ethernet 10 Base 2 is an example of               network topology. (A)  Bus                                           (B)  Ring (C)  Star

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