Simulation-based design integration improves reliability of hybrid vehicles

Simulation-based design integration improves reliability of hybrid vehicles

Due to integration requirements, hybrid vehicles have become the most complex system for design, manufacturing, and maintenance. Robust design methods provide a framework for designing reliable hybrid vehicle systems.

People used to develop electric vehicles in the past to solve the problem of higher fuel costs and increasing exhaust emissions. However, their development has suffered a lot due to limited driving distance and lack of supporting infrastructure (ie charging stations). The advanced nature of the hybrid electric vehicle lies in the conversion bridge between the internal combustion engine and the electric vehicle. Hybrid vehicles have high fuel efficiency, and electric vehicles can reduce emissions, thereby driving longer distances, and making it easier to use the infrastructure of internal combustion engines to obtain energy support.

In hybrid vehicles, the powertrain includes components from internal combustion engines and electric vehicles. The list of system components includes: a battery pack, an electric motor / generator and an internal combustion engine. The internal combustion engine provides electrical and mechanical power to the system. The powertrain of a hybrid electric vehicle adopts three configurations: series configuration, parallel configuration, and series-parallel combination configuration. Regardless of the configuration, the reliable operation of the car depends on the successful integration of the powertrain components.

Electromechanical systems

Both standard and hybrid vehicles rely on the integration of electric power, machinery, and software technology, and people increasingly use automotive electronics and software to control or replace the work of machinery. The intersection of these three design disciplines becomes mechatronics. Hybrid electric vehicles are the core of mechanical and electronic design.

Combining these technologies into a standard car will face complex design challenges, where electronic and software controls are used for non-power source applications. In the process of integrating non-powered vehicle electronic source systems, the design of hybrid vehicles faces the same challenges, and the electronic and software control of vehicle power systems is more complicated. Because of this integration requirement, hybrid vehicles are one of the most complex systems to be designed, manufactured, and maintained.

As the complexity of automobiles increases, people begin to care about reliability. Therefore, designing a hybrid vehicle system requires a systematic and organized development method. In order to ensure system reliability, the organization method needs to consider reliability issues as an integral part of the design process from the beginning of design. Robust design methods provide the organized architecture needed to design reliable hybrid vehicle systems.

Robust Design (RobustDesign) method is an organized and proven development philosophy, and its design purpose is to provide system reliability. Robust design principles allow design teams to deal with complex system integration issues in a repeatable process. As shown in the figure below, the system concept based on the robust design inputs the signal and processes an appropriate response. However, in a typical environment, design changes may affect system performance. The design team must implement control technology to compensate for design changes.

The focus of the robust design process is to reduce the impact of design changes on system performance and reliability. These changes may come from inside or outside the design source, including component tolerances, manufacturing processes, user modes, environment, and system aging. The change. Despite the variety of these changes, each factor may have a large impact on the reliability of the system. The main goal of the robust design process is to optimize the system design in terms of performance, reliability, and cost while solving the problems caused by these changes.

In a typical design process, solving problems caused by multiple changes requires extensive testing. This means that once the system design is complete, a prototype must be made and tested. A robust design process requires testing multiple variables, which means building a new prototype and testing each variable. Obviously, using this design-prototype-test process to achieve robust design is too time-consuming and actually expensive.

The solution is to transfer the design-prototype-test operation to the virtual world for simulation and analysis. This is often referred to as a virtual prototype. Using modern design tools like Saber, design teams can design and build virtual prototypes of their systems and run multiple tests within the time and budget allocated to the traditional design-prototype-test process. Therefore, simulation and modeling are key requirements to achieve a robust design process.

Figure 1 The main transmission assembly system of a hybrid passenger car includes: motor / generator (front), controller (middle) and battery pack (rear)

C7/C9 Light Bulb LED Filament COB technology provides amazing illumination. The LED filament bulb tough polystyrene construction provides super bright and shatterproof.Liven up your light display for the holidays with these luxury bulbs! Install these Bulbs into screw base fixtures directly. Unlike fluorescent bulbs, these bulbs are free of UV and mercury.

C7/C9 Light Bulb

Pink Led Bulb,Colored Light Bulb,E12 Replacement Bulb,Purple Light Bulb

DONGGUAN JIANXING LIGHTING ELECTRIC APPLIANCES CO., LTD , https://www.rslightstring.com