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Electrical

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20 Nov 2020

Simulation - A Handy Tool for Product Development

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Skill-Lync

Simulation - A Handy Tool for Product Development

Simulation has become a vital factor in product designing if we wish to create a fault-free product with greater efficiency. Not only does it help in eliminating faults and errors in our model before implementing it on hardware, but it can also help you save expenses in the long run.

Let's take a closer look at simulation-driven product development and how it can improve efficiency.

Design Of Experiments (DOE)

In DOE, let us assume that in a particular rib, you have width, thickness, and angle, and you wish to see how your system varies by tweaking specific parameters, such as altering the width from -w to +w or thickness from -t to +t. 

These parameters can change your design target factors, such as stiffness or stress. DOE helps you deduce the most suitable variables for your system design without compromising structural integrity.

For instance, you can calculate the best configurations and figures for various dimensions while designing your system out of 50 Permutations and Combinations.

DOE lets you strategically eliminate values that might not work for your system, even before actual simulation. After DOE, you can move on to optimization to scale your results.

Design Robustness, Process Capability

After landing on the correct values of thickness, width, or other parameters, you must see how your system gets processed.

Source

Consider that you have selected 2mm as the final thickness for the pump valve of your system, which you have depicted using the straight line.

We set the Upper Spec Limit at 2.1 while the Lower Spec Limit is at 1.9. As we test the system, the thickness value deviates from the intended figure; however, it remains between the USL and the LSL, implying that the system would not encounter any deterrents in its operation.

To understand this from the perspective of processing, we consider the following figure.

Source

Here, the graph has a normal distribution to depict the variation of thickness for various components.

For most of the components, the thickness remains at 2; however, some sections exhibit a thickness value that exceeds the USL or falls under the LSL benchmark, which is not acceptable.

We measure the values of various parameters using a quantity called 'Cp.' We define it as the ratio of the difference between the USL and the LSL by six times sigma, where sigma is the standard deviation. 

The first figure denotes Cp<1, which is not acceptable. Thus, the process, as mentioned in the first distribution figure, is not practical for implementation. 

The second figure denotes Cp=1, which might be considered as the values almost touch the USL or the LSL but remain within the desired limits.

However, practical implementation of the second system is still not viable as the value of a parameter hitting extremities would significantly reduce the confidence level in the machine as it would have a higher chance of breaking down. 

With Cp>1, the extremities of the parameters are well within the limits of USL and LSL. This representation is ideal for how a system must exhibit its characteristics.

Early Finding Is a Big Reward

Source

This figure describes how simulation can help in product designing. As you propagate ahead in product designing, cost skyrockets exponentially. 

You can make alterations in the lower stages of development; however, in later stages, you cannot afford to include any changes as it would not be economical.

Why Pick Simulation?

Here are some reasons to involve simulations in your product designing pathway and how simulation-driven product development can proliferate profits and boost efficiency - 

  • Identifying Issues Early in the Design Process: You can simulate your entire system and identify any errors before implementing it on hardware to help you save unnecessary expenses.
  • Reducing the Need and Cost for Multiple Prototypes: Rather than testing copious prototypes, you can simulate a few brackets and get the desired output.
  • Flexibility to Try Numerous Iterations/Concepts: Since the job of rendering too many prototypes gets eliminated by simulation, you would have more time and resources to try out diverse iterations.
  • Optimizing the Product Design: You can fine-tune and optimize your product before building it on hardware, allowing you to eliminate errors and create a flexible design.
  • Mitigating Product Failure Risk, Warranty, and Liability Claims: You can reassure your customers of the guarantee of your product by making it durable and less prone to malfunctions with constant refinement via simulation.

Some Statistics

Here are some statistics to prove that simulation has benefitted various organizations in boosting efficiency, product authenticity, and reduce malfunctions.

Source

According to this table, the companies using simulation have been able to decrease physical prototypes by 44%. Even the companies that have not harnessed the power of simulation tools have reduced prototypes by 32%.

The number of iterations has increased by 56% for companies fully harnessing simulation and 27% for the ones still in the development phase of implementing simulation.

Simulation-Driven Design

Source

We define simulation-driven design as a design process where decisions related to the behavior and performance of the system in all major phases of the process get supported by computer-based product modeling and simulation.

We use simulation in every stage, including verifying your concept by simulation, optimizing it, and ultimately improving the model before actual implementation.

CAE in Product Design

Source

Below are the various stages involved in product design where simulation significantly helps in squashing bugs, faults, and improving performance -

  • Project Initiation: We use quoting for this phase, where we perform initial feasibility studies to gain the confidence of the customer.
  • Project Launch: This phase signifies the end of the project planning phase and the commencement of the executing and monitoring/controlling phases, facilitated by simulation.
  • Concept Direction: We use simulation to generate a concept and develop samples.
  • Concept Approval: Simulation can help build pre-prototype for faster concept approval by shortlisting the features as-well-as the drawbacks of the system.
  • Final Approval: You can use simulation to develop the final prototype and validate your design.
  • Production Approval: With all errors and faults removed via simulation and development, the system gets sent for production approval.
  • Close Out and Transfer: This stage finalizes all project activities achieved across all phases of the project to close the project formally and transfer the completed project as fit.

Final Words

Simulation has proven to be a cost and time-saving addition to the product development process over the years. As such, understanding the fundamentals of simulation is a must for those who want to pursue a career in product design.

Learn more about simulation-driven product development by visiting Skill-Lync and upgrade your skills for substantial job opportunities. 


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Navin Baskar


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