技术
- 分析与建模 - 数字孪生/模拟
- 网络与连接 - 射频识别
适用行业
- 航天
- 化学品
适用功能
- 采购
用例
- 交通监控
- 虚拟现实
服务
- 测试与认证
关于客户
本案例研究中的客户是默奇森宽场阵列 (MWA) 射电望远镜,它是平方公里阵列 (SKA) 的前身。 MWA 位于西澳大利亚的默奇森射电天文台。它由 128 个块组成,每个块由 16 个均匀分布的天线单元组成,采用 4×4 配置,间隔 1.1 m。本案例研究中介绍的工作重点是电子转向相控阵,其中转向是通过向阵列中的每个元件引入相位延迟来实现的。相控阵天线具有方向相关的主波束。为了正确校准射电望远镜收集的数据并对其进行成像,必须准确了解波束方向图。
挑战
默奇森宽场阵列 (MWA) 射电望远镜是平方公里阵列 (SKA) 的前身,在表征其光束方向图方面面临着挑战。阵列的光束方向图可以通过测量来确定,但这种方法非常耗时并且需要专门的设备。因此,基于模拟的方法被认为是最实用的。波束方向图是 16 个阵列元件中每个元件以及系统工作频率的函数。为了对模式进行建模,每个阵列元件都必须在工作频带内的不同频率下独立激励。然后可以在任意转向方向上对全阵列波束方向图进行建模。以前,波束方向图的模拟是使用分析模型进行的,但需要更严格的方法来模拟完整的阵列几何形状。
解决方案
Altair 的电磁仿真工具 FEKO 用于克服本案例研究中面临的挑战。由于需要分析大量不同的配置,FEKO 的自动化在自动设置不同配置方面发挥了关键作用,从而节省了大量时间。还需要 FEKO 的球形模式远场表示来重建阵列波束方向图,并在方位角和天顶角上具有可调分辨率。使用了 FEKO 的矩量法 (MoM) 求解器,众所周知,该求解器可以准确且高效地解决具有这些属性的问题。该阵列是在 5x5m 的实心接地平面上建模的。每个 LNA 由集总 RLC 电路表示,该电路连接到每个阵列元件的馈电端口。阵列下方的地面使用 FEKO 的平面多层基底模型进行建模,具有含水量为 2% 的土壤的典型介电常数和电导率。
运营影响
数量效益
Case Study missing?
Start adding your own!
Register with your work email and create a new case study profile for your business.
相关案例.
Case Study
Airbus Soars with Wearable Technology
Building an Airbus aircraft involves complex manufacturing processes consisting of thousands of moving parts. Speed and accuracy are critical to business and competitive advantage. Improvements in both would have high impact on Airbus’ bottom line. Airbus wanted to help operators reduce the complexity of assembling cabin seats and decrease the time required to complete this task.
Case Study
Aircraft Predictive Maintenance and Workflow Optimization
First, aircraft manufacturer have trouble monitoring the health of aircraft systems with health prognostics and deliver predictive maintenance insights. Second, aircraft manufacturer wants a solution that can provide an in-context advisory and align job assignments to match technician experience and expertise.
Case Study
Honeywell - Tata Chemicals Improves Data Accessibility with OneWireless
Tata was facing data accessibility challenges in the cement plant control room tapping signals from remote process control areas and other distant locations, including the gas scrubber. Tata needed a wireless solution to extend its control network securely to remote locations that would also provide seamless communication with existing control applications.
Case Study
Aerospace & Defense Case Study Airbus
For the development of its new wide-body aircraft, Airbus needed to ensure quality and consistency across all internal and external stakeholders. Airbus had many challenges including a very aggressive development schedule and the need to ramp up production quickly to satisfy their delivery commitments. The lack of communication extended design time and introduced errors that drove up costs.
Case Study
Advanced Elastomer Systems Upgrades Production
In order to maintain its share of the international market for thermoplastic elastomers AES recently expanded its Florida plant by adding a new production line. While the existing lines were operating satisfactorily using a PROVOX distributed control system with traditional analog I/O, AES wanted advanced technology on the new line for greater economy, efficiency, and reliability. AES officials were anxious to get this line into production to meet incoming orders, but two hurricanes slowed construction.