open loop

简明释义

开环回路

英英释义

例句

1.When you set a timer on your oven, it operates in an open loop mode until the time is up.

当你在烤箱上设置定时器时，它在时间到之前以开环模式运行。

2.An open loop irrigation system relies solely on a schedule rather than soil moisture levels.

一个开环灌溉系统完全依赖于计划，而不是土壤湿度水平。

3.The washing machine has an open loop cycle that runs for a fixed duration regardless of the dirtiness of the clothes.

洗衣机有一个开环循环，无论衣物的脏污程度如何，都以固定时间运行。

4.In an open loop traffic control system, the signal changes at fixed intervals without considering real-time traffic conditions.

在一个开环交通控制系统中，信号在固定时间间隔内变化，而不考虑实时交通状况。

5.In control systems, an open loop system does not use feedback to determine if the output has achieved the desired goal.

在控制系统中，开环系统不使用反馈来判断输出是否达到了预期目标。

作文

In the realm of control systems, the term open loop refers to a type of system that operates without feedback. This means that the output of the system does not influence its input. To illustrate this concept, consider a simple example: a washing machine that runs for a predetermined amount of time regardless of whether the clothes are clean or not. In this case, the machine is functioning in an open loop manner, as it does not adjust its operation based on the cleanliness of the garments. The lack of feedback in an open loop system can be both an advantage and a disadvantage. On one hand, such systems are typically easier to design and implement because they do not require complex sensors or feedback mechanisms. They can also be more cost-effective, as they rely on simple timing or predefined sequences of operation. For instance, a toaster that operates for a set duration is an example of an open loop system; it will toast the bread for the same amount of time each cycle, without adjusting for the actual browning of the bread. On the other hand, the absence of feedback in an open loop system can lead to inefficiencies and potential errors. Since these systems do not adjust based on output, they may not perform optimally under varying conditions. For example, if the washing machine encounters a particularly dirty load, it will still run for the same set time, which may not be sufficient to clean the clothes properly. This limitation highlights the importance of feedback in certain applications, where adaptability is crucial. In contrast to open loop systems, closed-loop systems incorporate feedback, allowing them to adjust their operations based on the output. A thermostat controlling a heating system is a classic example of a closed-loop system. It measures the current temperature and adjusts the heating accordingly to maintain a desired level. This feedback mechanism allows for greater accuracy and efficiency, especially in environments where conditions can change rapidly. Despite their limitations, open loop systems can be perfectly suitable for many applications. They are often used in scenarios where precision is less critical, and simplicity is preferred. For instance, in industrial processes that are highly standardized, an open loop control might suffice to maintain efficiency without the need for complex adjustments. Moreover, understanding the distinction between open loop and closed-loop systems can help engineers and designers choose the appropriate control strategy for their specific needs. By recognizing when feedback is necessary and when it can be omitted, they can optimize performance while managing costs. In conclusion, while open loop systems have their place in various applications, it is essential to evaluate their suitability based on the specific requirements of the task at hand. The simplicity and cost-effectiveness of open loop designs can be advantageous, but one must also consider the potential drawbacks of lacking feedback. Ultimately, the choice between open loop and closed-loop systems should be guided by the goals of the project and the nature of the processes involved.

在控制系统的领域中，术语open loop指的是一种没有反馈的系统。这意味着系统的输出不会影响其输入。为了说明这一概念，可以考虑一个简单的例子：一台洗衣机在预定的时间内运行，无论衣物是否干净。在这种情况下，洗衣机以open loop的方式运行，因为它不会根据衣物的清洁程度调整其操作。在open loop系统中缺乏反馈既有优点也有缺点。一方面，这种系统通常更容易设计和实施，因为它们不需要复杂的传感器或反馈机制。它们也可能更具成本效益，因为它们依赖于简单的定时或预定义的操作序列。例如，一台在设定时间内工作的烤面包机就是一个open loop系统的例子；它每个周期都会在相同的时间内烤面包，而不根据面包的实际上色进行调整。另一方面，open loop系统中缺乏反馈可能导致低效率和潜在错误。由于这些系统不根据输出进行调整，它们在不同条件下可能无法最佳运行。例如，如果洗衣机遇到特别脏的衣物，它仍将运行相同的设定时间，这可能不足以妥善清洗衣物。这一局限性突显了在某些应用中反馈的重要性，在这些应用中，适应性至关重要。与open loop系统相反，闭环系统包含反馈，允许它们根据输出调整操作。控制供暖系统的恒温器就是一个经典的闭环系统示例。它测量当前的温度并相应地调整供暖，以保持所需的温度水平。这个反馈机制使得在条件快速变化的环境中实现更高的准确性和效率成为可能。尽管存在局限性，open loop系统在许多应用中仍然可以完全适用。它们通常用于对精度要求较低且更倾向于简单性的场景。例如，在高度标准化的工业过程中，open loop控制可能足以维持效率，而无需复杂的调整。此外，理解open loop和闭环系统之间的区别可以帮助工程师和设计师选择适合其特定需求的控制策略。通过认识到何时需要反馈以及何时可以省略反馈，他们可以在管理成本的同时优化性能。总之，虽然open loop系统在各种应用中都有其位置，但根据任务的具体要求评估其适用性至关重要。open loop设计的简单性和成本效益可能是有利的，但人们也必须考虑缺乏反馈的潜在缺点。最终，选择open loop和闭环系统应根据项目的目标和涉及的过程的性质进行指导。