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In the face of unrelenting global market pressures, manufacturers must deliver innovative products that out-perform the competition and meet or exceed customer expectations. In same time, they have to contend with tight development schedules while satisfying tough quality standards, budgetary constraints, safety requirements, regulatory compliance and user comfort demands.
Traditionally, quick fixes seem like an easy way out when dealing with noise and vibration, kinematics, dynamics and fatigue problems. Unfortunately, changing the design to remedy a problem in one area of the structure may cause difficulties elsewhere. Adding damping or reinforcing structures increases product weight and manufacturing costs - counterproductive to the business and economic objectives of the product launch.
LMS Services offering for functional performances optimization
LMS Engineering Services is ready to partner with you to address your most critical engineering issues and make the difference between successful product launches and costly repairs or even failures. We welcome the opportunity to work with you in turning our approach to functional performance engineering into a strategic competitive advantage for your company. Extensive resources Highly educated staff of experts. Our team of multilingual engineers operates worldwide to help address difficult problems ...
Building more eco-friendly vehicles ranks high on the development agenda of manufacturers and suppliers
Very often, this ambition is linked to the successful introduction of hybrid or full electrical technology. However, like in the case of traditional cars – which are likely to remain the major bulk of the vehicles produced in the foreseeable future – it implies downsizing the Internal Combustion Engine (ICE) as well as further weight reduction.
All these new concepts impact strongly the Noise, Vibration and Harshness (NVH) behavior of the vehicle under development:
- Fuel-economy-driven measures on engine design result in acoustics and vibration degradation, resulting in particular quality issues, such as impulsive noises in the injector systems and high frequency whine in turbochargers.
- Weight reduction and ICE downsizing programs strongly affect noise and vibration transfer paths, causing driveline originated booming issues. In addition, torque lock-up strategies as well as start-stop features create transient vibrations.
- Without low frequency ICE noise, the interior sound quality for electrical vehicles (EV) is affected by high frequency sounds induced by small motorized parts, the HVAC system and fan as well as by transmission whine, while road and wind noise are likely to further degrade the sound experience.
- Noise from the electrical motor and inverter, as well as the battery cooling system, represent new challenges as do transient effects from switching mode drives in Hybrid Electric Vehicles.