Potential deadlock, Mechanical Engineering

Assignment Help:

Suppose an interesting situation represented in following figure (b). The Petri net somewhat shows a paradoxical situation. Intuitively we contain in our minds that by raising the initial marking of the Petri net we can raise its chances of it being live. By sum a token to p5 we can consider that t2 can be fired and the system attains a deadlock.

Thus we can interpret that raising the number of resources or the initial markings not all times assists in making the system live.

Furthermore we ignore any potential deadlock by employing additional intermediate places. That type of deadlocks appear while the operation say Oi, j, k is completed in at the machine Mk and Oi,j+1,k1 needs the machine Mk1 and the operation Oi1,j1,k1 is done at machine Mk1 and Oi1, j1+1,k needs machine Mk. The situation is shown in following figure (a) as represented below.

2164_Potential Deadlock.png

Figure: (a): A Potential Deadlock

The operations Oi,j+1,k and Oi1,j1+1,k1 are be reinitiated via swapping the resources Mk and Mk1. In the model represented in figure (a), the model fails to attain this. Hence we employ additional intermediate places to resolve the problem and it is portrayed in following figure (b) below.

2415_Potential Deadlock1.png

Figure: (b): A Solution for Potential Deadlock

The model as represented in figure consequent to having a buffer at machine. Via unloading otherwise via either a human operator or via a robot the part from the machine to the buffer after the operation the machine is available and deadlock does not arise. At all machine, the loading of the part onto the machine before the operation is seemed as the part of the operation. Such procedure avoids an exact type of potential deadlocks.


Related Discussions:- Potential deadlock

What is subsetting, What is Subsetting Subsetting : Vendors selected an...

What is Subsetting Subsetting : Vendors selected and implemented only portions of the whole of IGES, thus making exchange between two systems impossible without  prior agreemen

Transverse wave stretched string, Transverse Wave Stretched String As a...

Transverse Wave Stretched String As a typical example of wave motion in one-dimension, let us consider the transverse harmonic waves on a long, taut string. We assume that in e

What is vibration?, Describe vibration, How to calculate vibration?

Describe vibration, How to calculate vibration?

Calculate heat transfer through cylinder wall, Calculate Heat transfer thro...

Calculate Heat transfer through cylinder wall: Calculate change in entropy and heat transfer through cylinder walls, if 0.4m 3 o f a gas at the pressure of 10bar and 20

Steam turbine types, Is bleed necessary in condensing and back pressure bot...

Is bleed necessary in condensing and back pressure both the turbine? What is the use of bleed in steam turbine? What is the basic difference in condensing and backpressure turb

Computer algorithm for on-line scheduling , Computer Algorithm For On-Line ...

Computer Algorithm For On-Line Scheduling For Automated Manufacturing Systems  Introduction Now days  market  is  characterized  via  the  production  of  minute  batch

Determine the actual absolute velocity, Question: As shown in the figur...

Question: As shown in the figure, the jet transport B is flying north with a velocity V B = 600 Km/h when a smaller aircraft A passes underneath the transport headed in the 60

Define standard for external representation of product data, Standard for E...

Standard for External Representation of Product Data (STEP)  The furthest developed standard is by ISO 10303, or STEP, Standard for the Exchange of Product model data. One of t

Chassis lubrication system, Chassis Lubrication System : This lubrication ...

Chassis Lubrication System : This lubrication system consists of outer body parts, which are lubricated from outside of the body. Table of Lubrication Points Sl.

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