Software Speeds Nissan's Model-based Design

New emission standards, environmentally conscious customers, and engineering tools challenge automobile manufacturers. Even with those challenges, however, Nissan Motor Company Ltd. sought to be the world's first automobile manufacturer to deliver a vehicle to market with an exhaust-emission reduction technology that met the California Air Resources Board's (CARB) Partial Zero Emission Vehicle ...

12/01/2005


AT A GLANCE
 
  • Automotive control design

  • Model-based design software

  • Regulatory compliance

  • Development time dropped 50%

  • Fewer sensors


New emission standards, environmentally conscious customers, and engineering tools challenge automobile manufacturers. Even with those challenges, however, Nissan Motor Company Ltd. sought to be the world's first automobile manufacturer to deliver a vehicle to market with an exhaust-emission reduction technology that met the California Air Resources Board's (CARB) Partial Zero Emission Vehicle (PZEV) standard.
Historically, Nissan relied on a lengthy, paper-based development process using real engine hardware. This process required redundant design steps and thousands of iterations to achieve the desired system performance.

By replacing a paper-based design process with The Mathworks Inc.'s software tools for model-based design, Nissan designed an emission reduction system that was first implemented in its 2000 Sentra Clear Air (CA) model. Sentra CA became the first gasoline-powered vehicle to be CARB certified for the PZEV standard.

"If you drove 10 miles to work, then home in the Sentra, you would still produce less pollution than an ordinary car sitting in a driveway all day with its engine off," claims Shigeaki Kakizaki, assistant manager, Engine Management System Engineering Group No. 2 at Nissan.

"It is difficult to reduce development time and costs with a traditional development process," says Kakizaki. "We had reached the limit of our capabilities and needed a new process."

Less time, better controls

To achieve objectives, Nissan would need to reduce development time, implementing a new, sophisticated controls strategy, and minimize system costs by reducing the number of sensors to achieve low emissions.

Nissan used Matlab, Simulink, and Stateflow from The Mathworks Inc. to develop models of its emission-control strategy. These models became the main tools for the system, which engineers reused throughout the development process. Using Simulink, engineers first created a plant model of the engine to validate designs and refine the emission control strategy.

"Simulink enabled us to perform simulations early in the design process," says Kakizaki. "This helped us quickly validate our design ideas and refine our control strategies." Kakizaki's team validated algorithms on real engine hardware and met the emission requirements. They then began implementing their design and developing software.

For third-generation emission control, Nissan used Simulink to implement a "Sliding Mode Control" strategy—one of the latest advancements in emission control. Nissan applied this strategy to its Maxima, Quest, Murano, Z-car, and Titan trucks, and was able to reduce the number of sensors without losing control capability.

"Simulink helped us to move an advanced control strategy like Sliding Mode Control from research to implementation in production vehicles," says Kakizaki.

Nissan is currently improving testing and verification by applying a concept they call "model-based testing." By generating test cases from Simulink models and comparing results against the actual hardware implementation, model-based testing will reduce program verification time and software quality quantification efforts. Nissan is working with MathWorks' partner, Reactive Systems, on the development of this technology.

Results via better tools

"Evolving model-based design further into the testing phase will provide substantial improvements to the overall efficiency of our development process," notes Kakizaki. The improved tools and processes include:

  • Reducing development time by 50%. "When applying advanced control theories, Matlab and Simulink are far superior to in-house tools for analysis and design," says Kakizaki. "MathWorks tools helped reduce our programming by half and improved communication among our engineering teams."

  • Winning the U.S. Environmental Protection Agency Climate Protection Award for innovations in improving fuel economy and reducing zone-depleting hydrofluorocarbons. As of this writing, Nissan was the only automaker to receive such a commendation.

  • Reducing the number of sensors needed, a strategy first applied to 2003 Nissan Sentra models.






The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
Each year, a panel of Control Engineering and Plant Engineering editors and industry expert judges select the System Integrator of the Year Award winners in three categories.
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Women in engineering; Engineering Leaders Under 40; PID benefits and drawbacks; Ladder logic; Cloud computing
Robotic integration and cloud connections; SCADA and cybersecurity; Motor efficiency standards; Open- and closed-loop control; Augmented reality
Controller programming; Safety networks; Enclosure design; Power quality; Safety integrity levels; Increasing process efficiency
This article collection contains several articles on how advancements in vision system designs, computing power, algorithms, optics, and communications are making machine vision more cost effective than ever before.
Featured articles highlight technologies that enable the Industrial Internet of Things, IIoT-related products and strategies to get data more easily to the user.
This digital report will explore several aspects of how IIoT will transform manufacturing in the coming years.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Cloud, mobility, and remote operations; SCADA and contextual mobility; Custom UPS empowering a secure pipeline
Infrastructure for natural gas expansion; Artificial lift methods; Disruptive technology and fugitive gas emissions
Mobility as the means to offshore innovation; Preventing another Deepwater Horizon; ROVs as subsea robots; SCADA and the radio spectrum
Automation Engineer; Wood Group
System Integrator; Cross Integrated Systems Group
Jose S. Vasquez, Jr.
Fire & Life Safety Engineer; Technip USA Inc.
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
Each year, a panel of Control Engineering and Plant Engineering editors and industry expert judges select the System Integrator of the Year Award winners in three categories.
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Women in engineering; Engineering Leaders Under 40; PID benefits and drawbacks; Ladder logic; Cloud computing
Robotic integration and cloud connections; SCADA and cybersecurity; Motor efficiency standards; Open- and closed-loop control; Augmented reality
Controller programming; Safety networks; Enclosure design; Power quality; Safety integrity levels; Increasing process efficiency
This article collection contains several articles on how advancements in vision system designs, computing power, algorithms, optics, and communications are making machine vision more cost effective than ever before.
Featured articles highlight technologies that enable the Industrial Internet of Things, IIoT-related products and strategies to get data more easily to the user.
This digital report will explore several aspects of how IIoT will transform manufacturing in the coming years.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Cloud, mobility, and remote operations; SCADA and contextual mobility; Custom UPS empowering a secure pipeline
Infrastructure for natural gas expansion; Artificial lift methods; Disruptive technology and fugitive gas emissions
Mobility as the means to offshore innovation; Preventing another Deepwater Horizon; ROVs as subsea robots; SCADA and the radio spectrum
Automation Engineer; Wood Group
System Integrator; Cross Integrated Systems Group
Jose S. Vasquez, Jr.
Fire & Life Safety Engineer; Technip USA Inc.
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
Each year, a panel of Control Engineering and Plant Engineering editors and industry expert judges select the System Integrator of the Year Award winners in three categories.
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Women in engineering; Engineering Leaders Under 40; PID benefits and drawbacks; Ladder logic; Cloud computing
Robotic integration and cloud connections; SCADA and cybersecurity; Motor efficiency standards; Open- and closed-loop control; Augmented reality
Controller programming; Safety networks; Enclosure design; Power quality; Safety integrity levels; Increasing process efficiency
This article collection contains several articles on how advancements in vision system designs, computing power, algorithms, optics, and communications are making machine vision more cost effective than ever before.
Featured articles highlight technologies that enable the Industrial Internet of Things, IIoT-related products and strategies to get data more easily to the user.
This digital report will explore several aspects of how IIoT will transform manufacturing in the coming years.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Cloud, mobility, and remote operations; SCADA and contextual mobility; Custom UPS empowering a secure pipeline
Infrastructure for natural gas expansion; Artificial lift methods; Disruptive technology and fugitive gas emissions
Mobility as the means to offshore innovation; Preventing another Deepwater Horizon; ROVs as subsea robots; SCADA and the radio spectrum
Automation Engineer; Wood Group
System Integrator; Cross Integrated Systems Group
Jose S. Vasquez, Jr.
Fire & Life Safety Engineer; Technip USA Inc.
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
click me