open loop

简明释义

开口回线

英英释义

例句

1.An open loop irrigation system waters crops based on a set schedule rather than soil moisture levels.

开环灌溉系统根据设定的时间表为作物浇水，而不是根据土壤湿度水平。

2.The traffic control system was criticized for using an open loop approach, leading to congestion during peak hours.

该交通控制系统因使用开环方法而受到批评，导致高峰时段出现拥堵。

3.In control systems, an open loop system does not use feedback to adjust its output.

在控制系统中，开环系统不使用反馈来调整其输出。

4.In programming, a function call that does not return any value can be considered an open loop operation.

在编程中，不返回任何值的函数调用可以视为开环操作。

5.The washing machine operates in an open loop mode, running through its cycle without sensing the cleanliness of the clothes.

洗衣机以开环模式运行，在没有感知衣物清洁度的情况下完成整个洗涤周期。

作文

In the world of control systems and automation, the term open loop refers to a type of control mechanism that operates without feedback. This concept is crucial in understanding how various systems function, particularly in engineering and technology. To illustrate this, let us consider an example of a simple heating system. When you set a thermostat to a specific temperature, the heater will turn on until the temperature reaches that set point. However, if the heater continues to operate without checking the current temperature, it is functioning as an open loop system. This means that there is no feedback to inform the heater when to stop, which can lead to overheating or energy waste.The lack of feedback in an open loop system can be both advantageous and disadvantageous. On one hand, open loop systems are generally simpler and less expensive to implement because they do not require complex sensors or controllers. For instance, a washing machine that runs through a pre-set cycle without measuring the cleanliness of the clothes is an example of an open loop system. It operates based solely on time rather than the actual condition of the laundry. This simplicity makes open loop systems attractive for applications where precision is not critical.On the other hand, the absence of feedback can result in inefficiencies. In cases where conditions may vary, such as changing temperatures or varying loads, open loop systems can lead to poor performance. For example, if the heater mentioned earlier encounters an unexpected drop in room temperature, it will continue to heat without adjusting its output based on the actual needs of the environment. This could result in excessive energy consumption and discomfort.Moreover, open loop systems can pose safety risks in certain applications. Consider an industrial process where precise temperature control is essential. If a furnace operates in an open loop manner without monitoring the temperature, it could reach dangerously high levels, leading to equipment failure or even accidents. Therefore, while open loop systems have their place, they are often best suited for situations where the variables are constant and predictable.In contrast, closed-loop systems, which utilize feedback to adjust their operations, are typically more efficient and safer. These systems continuously monitor their outputs and make necessary adjustments based on real-time data. For instance, a modern air conditioning unit that adjusts its cooling based on the room temperature is a closed-loop system. The feedback allows it to maintain a comfortable environment while optimizing energy use.In conclusion, understanding the concept of open loop systems is essential for anyone interested in engineering and automation. While they offer simplicity and cost-effectiveness, their limitations must be acknowledged. In many cases, the choice between open loop and closed-loop systems will depend on the specific requirements of the application at hand. As technology advances, the integration of feedback mechanisms becomes increasingly common, allowing for greater efficiency and safety across various industries. Ultimately, recognizing when to use an open loop system versus a closed-loop system can significantly impact the effectiveness of a given process or application.

在控制系统和自动化的世界中，术语open loop指的是一种不依赖反馈的控制机制。这一概念对于理解各种系统的运作至关重要，特别是在工程和技术领域。为了说明这一点，让我们考虑一个简单的加热系统的例子。当你将恒温器设置到特定温度时，加热器将开启，直到温度达到设定值。然而，如果加热器在没有检查当前温度的情况下继续运行，它就是一个open loop系统。这意味着没有反馈来告知加热器何时停止，这可能导致过热或浪费能源。在open loop系统中，缺乏反馈既有优点也有缺点。一方面，open loop系统通常更简单且成本较低，因为它们不需要复杂的传感器或控制器。例如，一台按照预设周期运行而不测量衣物清洁度的洗衣机就是一个open loop系统。它完全依赖时间而不是衣物的实际状态来运行。这种简单性使得open loop系统在对精度要求不高的应用中显得吸引人。另一方面，缺乏反馈可能导致效率低下。在条件可能变化的情况下，例如温度变化或负载变化，open loop系统可能导致性能不佳。例如，如果前面提到的加热器遇到意外的室温下降，它将继续加热，而不会根据环境的实际需求调整输出。这可能导致过度的能源消耗和不适。此外，在某些应用中，open loop系统可能会带来安全风险。考虑一个对温度控制精确度要求极高的工业过程。如果炉子以open loop方式运行而不监测温度，它可能会达到危险的高水平，导致设备故障甚至事故。因此，尽管open loop系统有其应用场合，但它们通常最适合于变量恒定且可预测的情况。与之相对的是，闭环系统利用反馈来调整其操作，通常更高效且更安全。这些系统持续监测其输出，并根据实时数据进行必要的调整。例如，一台现代空调装置根据房间温度调整其制冷能力就是一个闭环系统。反馈使其能够在优化能耗的同时维持舒适的环境。总之，理解open loop系统的概念对于任何对工程和自动化感兴趣的人来说都是至关重要的。虽然它们提供了简单性和成本效益，但必须承认它们的局限性。在许多情况下，选择open loop系统与闭环系统将取决于特定应用的要求。随着技术的进步，反馈机制的集成变得越来越普遍，从而在各个行业中实现更大的效率和安全性。最终，识别何时使用open loop系统与闭环系统可以显著影响给定过程或应用的有效性。