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Model-Based Design Driven by Embedded Systems

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apresher
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Model Based Design
apresher   3/9/2012 9:10:16 AM
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Beth, Excellent article.  This approach has a ton of potential for transforming the way that automation/machinery is developed, designed and deployed. It will be interesting to see how this area develops with control vendors.  There are some solutions in the marketplace now but this will require different planning and thinking in terms of the machinery development process to gain traction. Interesting.

Beth Stackpole
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Re: Model Based Design
Beth Stackpole   3/9/2012 3:47:01 PM
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Thanks Al. I could totally see how this design approach could have huge ramifications for easing the development burden around automation and controls machinery given the high content of software and the complex movements. From all accounts, it's a learning process, however, and a very different development approach than traditional engineering workflows. There is definitely a commitment required to get training for engineers, not just on the tools and software, but on the modeling work itself and how to best adapt it into design processes.

TonyLennon
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Re: Model Based Design
TonyLennon   3/12/2012 3:11:45 PM
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I think that Al is seeing an emerging trend by industrial automation suppliers to support Model-Based Design. Besides FESTO, B&R Automation, Beckhoff Automation, and Bachmann Electronics all have targets that accept ANSI C-code generated from Simulink models. Siemens, too, offers a means to port C-code to a PC-based controller. This connectivity helps machine builders perform control system design using simulation and implement on their controllers.

Charles Murray
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Embedded dilemma
Charles Murray   3/9/2012 4:49:15 PM
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Festo makes an excellent point here, and there are many, many other embedded developed who have the same dilemma: It's often difficult to optimize controller designs by building and testing on physical hardware. This article is going to be a keeper for many embedded developers.

Mydesign
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Prototyping the models
Mydesign   3/12/2012 12:10:23 AM
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Beth, model based designing and prototyping are very important mile stones in any of the defence and avionic projects. Math lab and simulink are two major software's used for simulation purpose in engineering background. In most of the prototyping projects, spiral models are followed where blocks are building over the existing one in an incremental form.

Beth Stackpole
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Re: Prototyping the models
Beth Stackpole   3/12/2012 7:55:31 AM
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@Mydesign: You are right--the process is a major milestone, particularly in those industries where embedded systems lie at the heart of system designs. Beyond MATLAB and Simulink, any other tools that you are familiar with that are giving developers a jump on model-based design processes?

tomhayden
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Model Based Design
tomhayden   3/12/2012 8:11:17 AM
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Nice post!! It gave the knowledge if how the equipments are developed. Model based designed is an aproach to eveolve a platform for communicating through the entire design process in process of development cycle. The development is carried out through development of a plant, developing a device to control a plant, simulate the device for plant and the plant itself, and lastly intergrating all these.

 

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markbreaker
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Re: Model Based Design
markbreaker   11/5/2012 6:01:53 AM
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Well such a nice post i like it also you right "tomhaden"

 

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TinaGeorge
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other tools
TinaGeorge   3/12/2012 3:39:57 PM
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MapleSim, from Maplesoft, is a model-based design tool built on a foundation of symbolic computation technology. It handles all of the complex mathematics involved in the development of engineering models, including multi-domain systems, plant modeling, and control design. It is the only comprehensive modeling system built within a natively symbolic framework. Therefore, not only does it save model development time from months to days, but also avoids some of the worst sources of error and computational inefficiencies generated by traditional, numeric-based modeling tools. Leading automotive and aerospace manufacturers, electronics system designers and high-end robotic design engineers are using MapleSim in their work. You can read more about it here: www.maplesim.com


apresher
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Value of Modelling and SImulation
apresher   3/12/2012 5:07:38 PM
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Responding to Tony, I don't think there is any question but that modelling and simulation can be tremendous assets in developing better and more efficient automation control solutions. The key is that it will require a different way of thinking from the past, and probably experimenting with software solutions and sample projects for engineers to get comfortable. Getting past the questions of whether it will be worth it is important, especially since many companies already have their systems modelled already.  Good stuff.

Jon Titus
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Design Requirements
Jon Titus   3/12/2012 7:39:24 PM
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One of the big advantage of model-based design centers on breaking the "toss it over the wall" mentality that companies have had for years. Various departments, from marketing down to production had "walls" that blocked communications and thus caused problems. Design changes sometimes got misinterpreted due to lack of proper documentation and lack of regulat communications.  By clearly defining system requirements at the start and giving everyone access to them, model-based design techniques help companies complete designs faster and with fewer problems. And because engineers can actually execute the models, they see how circuits, mechanics, and software work together before they build anything.

But, model-based design requires a large commitment of time, talent, and loot and a company that wants to make the jump needs an evangelist who can "sell" others on the virtues and benefits of this approach to designs.  Not all engineers will want to jump on the bandwagon, though.

Beth Stackpole
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Re: Design Requirements
Beth Stackpole   3/13/2012 6:53:13 AM
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Jon, I don't think I could have said it better (in fact, I know I couldn't). You really just described the biggest hurdle to model-based design. Because it's an entirely new way of thinking and because it requires a completely different mentality of cross-functional collaboration, there will ultimately be push-back from engineers who don't thoroughly understand the benefits and are reticent to make any kind of change.

To embrace this on a grand scale throughout an engineering organization will require a robust change management effort and as you mention, a champion. Bringing in model-based design tools on a piecemeal basis won't be enough to foster any kind of sweeping process change.

Jon Titus
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A Good Place to Start
Jon Titus   3/13/2012 12:49:27 PM
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Thanks, Beth.  Here's a book I recommend highly, "Driving Technical Change; Why People on Your Team Don't Act on Good Ideas, and How to Convince Them They Should," by Terrency Ryan, published by The Pragmatic Bookshelf.  The author describes the types of people we typically find on a team, from the uninformed and the herd to the cynics and irrationals, and he explains how to work with them and get them on-board with new tools and techniques. (OK, you can't convince the irrational people.) Although the book used programmers for its examples, the information applies equally well to engineers who should adopt model-basded design. At 128 pages, the book is easy to read in one evening.

TonyLennon
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Re: A Good Place to Start
TonyLennon   3/13/2012 4:13:07 PM
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John and Beth are correct about the challenge of embracing Model-Based Design for developing embedded systems. My own experience is that companies gradually adopt, usually starting with control system engineers. The progression is usually multiyear, beginning with desktop simulation, moving to real-time testing and validation, and ending with code generation for production systems.  This approach provides increasing value at each stage, can be woven into existing design practices, and avoids the unwanted shock of a complete change to a development process. Industries are in different stages of Model-Based Design adoption. The Aerospace and Automotive industries are leaders, primarily because their software systems are very complex.  In 2010,  Design News discussed, http://www.designnews.com/document.asp?doc_id=229640, how the Automotive industry is adopting Model-Based Design. Within the industrial markets, automation suppliers developing motor controls and power backups, and solar and wind energy companies developing renewal energy sources are the furthest along the path. As my colleague Ken Karnofsky said in the article, "Software complexity is the big driver." But we are seeing more interest from the traditional machine builders. Recently an engineer with whom I was meeting pointed out that it is the software that running in machines that is becoming more complex, not only the hardware.

Beth Stackpole
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Re: A Good Place to Start
Beth Stackpole   3/14/2012 8:03:51 AM
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Thanks for the perspective, Tony, and a great description for how the adoption tends to unfold within organizations. Jon: Thanks for the recommendation on a book for change management. Whether it's about leading a culture of model-based design or some other type of major process change, I imagine there are some good takeaways for overcoming resistance.

 

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