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

Batteries and alternative sources of energy, Illustrate six typical applica...

Illustrate six typical application of primary cells. (b) Illustrate six typical applications of secondary cells. (c) Illustrate the advantages of a fuel cell over a conventional

Sliding and rolling, Sliding and Rolling Consider the following example...

Sliding and Rolling Consider the following example. A cylinder of mass  M  and radius  R  is held at rest on a plane inclined at an angle to    to the horizontal. When the cyl

Example of change of enthalpy, Example of change of enthalpy: Q 0.5...

Example of change of enthalpy: Q 0.5kg/s of a fluid flows in steady state process. The properties of fluid at the entrance are measured as p 1 = 1.4bar, density = 2.5k

Firecracker welding, Firecracker Welding This is a semi automatic vers...

Firecracker Welding This is a semi automatic version of SMAW. A specially designed heavy - coated electrode, which can be of any length upto 2 m, is laid on the seam of a groo

Explain double bolting, Q. Explain Double Bolting? Where low strength b...

Q. Explain Double Bolting? Where low strength bolts must be used, initial bolting with higher strength low temperature bolts may be necessary to minimize accumulative strain an

Automatic feature recogniton system, I have been tasked to design a web bas...

I have been tasked to design a web based automatic feature recognition system for a press brake bending machine, how do I go about It?

Heat and mass transfer, mathematically example heat conduction through com...

mathematically example heat conduction through composite cylindrical

Over-hanging and cantilever beam - support reaction , Over-Hanging and Cant...

Over-Hanging and Cantilever Beam: Over-Hanging Beam: The beams on which one end or both ends are overhang are called as overhanging beam. 3. Cantilever Beam:

The linear dimension command, The Linear Dimension Command            ...

The Linear Dimension Command                                    You can use this command to generate horizontal and vertical dimensions.Creating a linear dimension is eas

Bolt stress to seat the gasket, Q. Bolt Stress to Seat the Gasket? The ...

Q. Bolt Stress to Seat the Gasket? The required bolt stress to seat the gasket can be calculated, using the recommended gasket seating stress provided by the manufacturer in ac

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