相关实验视频
Updated: Jul 20, 2025
18:11
Microfluidic Chips Controlled with Elastomeric Microvalve Arrays
Published on: October 1, 2007
21.2K
一个多通道FPGA控制系统
Daniel T Schussheim1, Kurt Gibble1
1Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
The Review of scientific instruments
|August 2, 2023
概括
一个新的现场可编程门阵列 (FPGA) 系统提供高速,多通道的实验控制. 它有效地管理多个伺服循环,并为高级应用程序展示新的过器.
科学领域:
- 实验物理实验物理学
- 控制系统工程 控制系统工程
- 嵌入式系统设计 嵌入式系统设计
背景情况:
- 先进的实验控制系统对于高精度的科学研究至关重要.
- 现有系统在通道数量,速度和资源效率方面经常面临局限性.
- 现场可编程门阵列 (FPGA) 为开发高性能控制解决方案提供了灵活的平台.
研究的目的:
- 开发和描述使用FPGA技术的多通道实验控制系统.
- 为了证明系统在管理多个高速伺服循环和复杂波形生成方面的能力.
- 为资源有限的FPGA环境提供高效的数字过器实现.
主要方法:
- 实现基于FPGA的定制控制系统,具有高分辨率模拟I/O和数字接口.
- 开发低延迟 (30 ns) 无限脉冲响应 (IIR) 的比例积分差分过器,使用比特转移和加法.
- 集成触摸屏接口,用于实时实验监控和控制.
- 应用的演示,包括激光锁定,温度伺服器和任意波形生成.
主要成果:
- 该FPGA系统提供10个模拟输入 (100MS/s,16位) 和14个模拟输出 (100MS/s,16位) 频道.
- 支持最多10个伺服循环,具有155 ns的延迟和MHz带宽,以及额外的低带宽伺服器.
- 经过证明的 IIR 过器实现 30 ns 的延迟,与基于乘数的设计相比,节省 FPGA 资源.
- 成功实施了Hänsch-Couillaud激光锁,可变工作周期温度伺服器和同步任意波形生成.
结论:
- 开发的FPGA系统为高频道计数,高速实验控制提供了一个强大而通用的平台.
- 高效的 IIR 过器设计使单个 FPGA 能够执行复杂的控制任务,从而减少了硬件需求.
- 该系统的灵活性和性能适用于一系列苛刻的科学应用.
相关概念视频
01:10Control Systems
1.2K
Control systems are everywhere in contemporary society, influencing diverse applications from aerospace to automated manufacturing. These systems can be found naturally within biological processes, such as blood sugar regulation and heart rate adjustment in response to stress, as well as in man-made systems like elevators and automated vehicles. A control system is essentially a network of subsystems and processes that collaboratively convert specific inputs into desired outputs.
At the heart...
At the heart...
1.2K
01:25Control Systems: Applications
653
Electrical engineering plays a pivotal role in our daily lives, with control systems at the heart of many applications, from home appliances to sophisticated space shuttles. Control systems manage and regulate the behavior of devices and processes, ensuring they function safely, correctly, and efficiently.
In modern vehicles, control systems manage various functions to enhance performance and safety. The steering wheel and accelerator are primary inputs in a car's control system. The...
In modern vehicles, control systems manage various functions to enhance performance and safety. The steering wheel and accelerator are primary inputs in a car's control system. The...
653
01:21Control System Problem
144
In an open-loop system, such as a basic thermostat, the poles of the transfer function influence the system's response but do not determine its stability. However, when feedback is introduced to form a closed-loop system, such as an advanced thermostat that adjusts heating based on room temperature, stability is governed by the new poles of the closed-loop transfer function.
When forming a closed-loop system, issues can arise if the poles cross into the unstable region, leading to potential...
When forming a closed-loop system, issues can arise if the poles cross into the unstable region, leading to potential...
144
01:17Open and closed-loop control systems
813
Control systems are foundational elements in automation and engineering. They are broadly categorized into open-loop and closed-loop systems. These classifications hinge on the presence or absence of feedback mechanisms, significantly influencing the system's performance, complexity, and application.
An open-loop control system operates without feedback from the output. It consists of two primary elements: the controller and the controlled process. The controller receives an input signal...
An open-loop control system operates without feedback from the output. It consists of two primary elements: the controller and the controlled process. The controller receives an input signal...
813
01:22Multi-input and Multi-variable systems
129
Cruise control systems in cars are designed as multi-input systems to maintain a driver's desired speed while compensating for external disturbances such as changes in terrain. The block diagram for a cruise control system typically includes two main inputs: the desired speed set by the driver and any external disturbances, such as the incline of the road. By adjusting the engine throttle, the system maintains the vehicle's speed as close to the desired value as possible.
In the absence...
In the absence...
129
01:26Feedback control systems
346
Feedback control systems are categorized in various ways based on their design, analysis, and signal types.
Linear feedback systems are theoretical models that simplify analysis and design. These systems operate under the principle that their output is directly proportional to their input within certain ranges. For instance, an amplifier in a control system behaves linearly as long as the input signal remains within a specific range. However, most physical systems exhibit inherent nonlinearity...
Linear feedback systems are theoretical models that simplify analysis and design. These systems operate under the principle that their output is directly proportional to their input within certain ranges. For instance, an amplifier in a control system behaves linearly as long as the input signal remains within a specific range. However, most physical systems exhibit inherent nonlinearity...
346