提高噪声、振动与声振粗糙度 (NVH) 测量过程中每个步骤的效率。
噪声、振动和声振粗糙度都是乘客体验到的特征，会影响他们对车辆质量的感知。其中太多，或者错误的“注释”可能意味着负面评论并影响未来的销售。因此，难怪制造商会投入如此多的时间和资源来优化车辆的 NVH 以改善客户认知。但是，贵公司是否拥有合适的设备和软件来高效评估 NVH 性能？
NVH 测试工程师面临着双重挑战，既要缩短上市时间、降低开发成本，又要确保质量和完整性。有限的原型可用性和测试时间使他们的工作进一步复杂化，需要提高产品验证效率。在这种充满挑战的环境中，他们必须评估多种测试条件和应用，同时还要满足严苛标准。
Simcenter 为 NVH 团队提供专用解决方案，以优化 NVH 测试活动。将可扩展的采集硬件与测量、处理和分析软件相结合，使 NVH 评估更具成本效益。Simcenter 直观且可扩展的 NVH 测试解决方案可实现高效的测量、分析、报告和数据共享。它们支持开发周期不同阶段的各种 NVH 活动，从故障排除到高通道数多物理场性能测试活动。
Noise, vibration and harshness are all characteristics passengers experience that shape their perception of quality in your vehicle. Too much of one of these, or the wrong “note” can mean negative reviews and impact future sales.
Noise refers to unwanted sounds that are perceived by the human ear. These sounds can originate from various sources within a vehicle, such as the engine, tires, road surface, and aerodynamic elements like wind and cooling fans.
Vibration refers to the mechanical oscillations within a vehicle. Vibrations originate from sources such as the engine, road, or wind, and they are felt by passengers at the steering wheel, seat, armrests, floor, and pedals.
Harshness refers to the subjective quality of the noise and vibration experienced in a vehicle. Unlike noise and vibration, which can be measured objectively, harshness is often evaluated qualitatively through human perception.
Simcenter integrates the entire NVH testing process from end to end.
In an environment where prototypes are limited, combining multi-attribute measurements is crucial for cost-saving and meeting tight testing deadlines. Whether you need ruggedized distributed systems for in-field measurements, high channel count test-bench systems or battery-powered pocket-sized devices, our state-of-the-art hardware, combined with user-centric software or web applications, can significantly reduce testing time. Handle a variety of sensor types and multiple data rates, configure channel set-ups in no time to streamlining multiple test setups into a single multi-channel measurement session. Save costs and boost productivity of your test campaigns with our multi-attribute data acquisition solutions combined with intuitive software for efficient data collection.
Simcenter includes a comprehensive suite of advanced vibration testing equipment and acoustic monopole sources for noise and vibration testing. It seamlessly integrates with Simcenter testing solutions software, delivering a unique solution combination that exceeds current market standards for productivity, data accuracy and overall customer expectations.
Ensure data integrity and streamline troubleshooting with our powerful NVH software suite. Our validation capabilities include an efficient data comparison and visualization tool for real-time data analysis. Automatically validate acquired data with customizable criteria to focus only on validated scenarios for high-quality analysis, eliminating unreliable measurements. Gain rapid insights into your noise and vibration data with interactive audio replay and filtering. And quickly identify critical elements before advanced processing for efficient analysis.
Explore a comprehensive range of processing capabilities for all analysis needs: from quick frequency content analysis to advanced sound quality metrics, torsional vibration, angle domain and human body vibration. Choose from predefined processing templates for standard analysis or create customized processes using an intuitive and modern interface. Experience the power of Simcenter Testlab and simplify your analysis workflows today.
As the amount of data from physical and virtual testing campaigns grows, it is fundamental to annotate, organize, report and share any relevant data. Unlock the power of efficient data centralization and reuse with Simcenter Testlab Data Management, seamlessly integrated within Simcenter Testlab Desktop to effortlessly annotate and share data across departments using the ASAM-ODS standard.
Customize the way you display your analysis results in Simcenter Testlab to have full control over how the data is presented. Print Simcenter Testlab reports to active Microsoft office documents and captivate your audience with the evidence of your accomplishments. And ultimately be able to easily share the results of your testing campaigns with test and simulation teams, inside or outside your organization.
Never lose valuable testing data again and automate your most common data validation, processing and reporting workflows. By using a centralized location for all of your NVH testing data, Simcenter can help your testing team collaborate more effectively and become more efficient. Simcenter lets your team see, and process live data from one location, such as an office, while test engineers and technicians are performing the tests live. The team can then automate data retrieval, processing and publishing, even from remote locations. For example, it can retrieve data remotely direct from Simcenter SCADAS RS hardware.
We also know that large organizations with different departments often measure data with different systems with different data types. But Simcenter can also support and process data from most of these systems. And by having all of your data stored in a central location, you can easily find and retrieve data from months or years back for quick access and review.
Emotors 使用 Simcenter NVH 测试工具实现出色的汽车电驱动工程设计
公司:Emotors
行业:汽车及交通运输行业
位置:Carrières-sous-Poissy, France
Siemens 软件:Simcenter Testing Solutions
量化各种声源及其传播途径，找出哪些比较重要、哪些会相互抵消。进行传递路径分析 (TPA)，以确定和评估从激励源到特定接收端位置的结构和空气能量传递路径。TPA 可量化各种声源及其传播途径，找出哪些对噪声问题的贡献最大、哪些会相互抵消。根据量化和建模的声源及传播路径，优化系统的声振和噪声、振动与声振粗糙度 (NVH) 性能变成一项轻而易举的设计任务。
Predicting the in-vehicle noise contribution of components, such as the powertrain, tire, HVAC and steering system during early development is tremendously challenging. To avoid endless design iterations, engineers need modular technologies that leverage measured individual component models into full-vehicle noise predictions.
This is exactly the scope of component-based TPA. The process starts by characterizing the source loads independently from the receiver structure, based on acquired free velocities or blocked forces. Next, using sub-structuring techniques, engineers can study the component-level NVH performance without having to physically create the full vehicle in all its variants. Such early predictions help to avoid issues and allow a more realistic design target setting.
您可以使用测试和仿真数据在虚拟环境中准确创建或组装系统，轻松评估不同开发阶段的修改或组件的效果，并充分利用贵公司的所有数据。用户界面简单易用，非专业人员也能准确预测最终产品的噪声、振动与声振粗糙度 (NVH) 性能。我们的解决方案使您的开发团队能够提供出色的 NVH 性能，同时控制开发时间和成本。
Verify noise contributions using a time-domain transfer path analysis model. This model allows you to listen to the recorded sound of the powertrain components, tire friction, wind and other contributors. It extends the use of transfer path analysis models to sound design and sound quality engineering. This process can also be applied to transient events such as engine restart and acceleration pedal tip-in/tip-out.
结合模态测试和分析工具来验证 3D 仿真模型、执行振动响应计算或完成根本原因和损伤检测分析。我们的解决方案整合了 40 多年的工程经验，可帮助您轻松执行完整的实验模态分析。
Torsional vibrations in power transmission systems induce noise and vibration disturbances that negatively impact comfort and may cause system failures. Simcenter NVH testing solutions help you visualize torsional vibrations and conduct high-precision rotational speed measurements on a wide range of angle and speed sensors and analyze orders, narrowband waterfalls and transmission errors.
Harmonic analysis is at the core of rotating machinery vibration and sound testing. Simcenter includes state-of-the-art signature testing solutions for fixed sampling and synchronous order tracking to derive waterfall, order cuts and engine maps from rpm and torque measurements in any operating condition. They make fully automated or highly interactive comparison of design variants easier than ever.
Shape the sound of your product by relying on our sound quality testing solutions for noise level benchmarking, assessment and troubleshooting. Listen, analyze and combine objective and subjective evaluations to design irresistible brand sounds.
The choice of materials used in your vehicle greatly impacts NVH performance and perceived quality by your end customers. A sound understanding of the advanced materials used in innovative products is essential for fast and responsive product development. Our range of materials testing solutions accurately characterize the acoustic properties of new and innovative materials and components, which in turn feeds simulation models, allows comparison between different samples and helps to improve existing products.
Our acoustic materials testing solution measures sound absorption and sound transmission loss with tube or our room-based testing. Accurate identification of properties of new and innovative materials increases the accuracy and reliability of simulation models based on quantified results and enables faster and more responsive development cycles.
Finding the source of noise in your vehicle is difficult to achieve with the human ear. But with Simcenter sound source localization solutions, you can visually pinpoint exactly where the source of a dominant noise. Modular digital and analog microphone arrays support a wide range of applications from acoustic troubleshooting to sound power ranking and aero-acoustic wind tunnel testing. By knowing the precise source of noise lets you immediately begin determining corrective measures to reduce or eliminate the noise.
Engine downsizing, cylinder deactivation and powertrain electrification change a vehicle’s sound signature. To maintain or redefine the brand sound, active sound design enhances interior sound and adds exterior sounds for the acoustic vehicle alerting system (AVAS). Simcenter has a dedicated automotive solution that includes several sound design methods and real-time synthesis based on various engine parameters, such as speed, throttle position and torque. You can validate the synthesis in the office, on a driving simulator or in the vehicle using a dedicated hardware.
In the move towards vehicle electrification, wind noise becomes a top priority for development since the combustion engine no longer masks wind noise. As a result, wind tunnels are now in greater demand. However, wind tunnel testing is a high-cost and time consuming endeavor and so testing facilities need improved procedures to cope with demand versus cost. For this reason, it is essential to capture as much information as possible during each test run. As a result, there is a shift from more basic testing systems towards more advanced, high channel-count systems.
Engineers are challenged to get the maximum out of test campaigns and need to understand which methods and technologies are the right mix for the job. By combining all different technologies into one integrated platform, new insights for improving vehicle aero-acoustic performance can be obtained. Simcenter delivers state-of-the-art technologies that maximize productivity and reliability to get the most out of the time you spend in the testing tunnel.
-640x360.jpg?auto=format,compress&w=843&q=60)
Automotive engineering consultancy uses Simcenter testing to assess the sound quality of electric vehicles.
Read case study
