open-loop control

简明释义

开环控制

英英释义

例句

1.A toaster operates on open-loop control 开环控制 by heating bread for a set amount of time regardless of how brown it gets.

烤面包机通过设定加热时间来工作，属于open-loop control 开环控制，而不考虑面包的上色程度。

2.The traffic light system in many cities uses open-loop control 开环控制 to change lights at fixed intervals without sensing traffic conditions.

许多城市的交通信号灯系统使用open-loop control 开环控制，以固定时间间隔改变信号灯，而不感知交通状况。

3.A microwave oven operates on open-loop control 开环控制 by running for a predetermined time to heat food, irrespective of the actual temperature of the food.

微波炉通过预定时间加热食物，属于open-loop control 开环控制，与食物的实际温度无关。

4.In a simple irrigation system, water is supplied to the fields without considering the moisture level in the soil, which is an example of open-loop control 开环控制.

在一个简单的灌溉系统中，水被供应到田地，而不考虑土壤中的湿度水平，这就是一个open-loop control 开环控制的例子。

5.An automatic washing machine may use open-loop control 开环控制 to fill water based on a timer rather than the load size.

自动洗衣机可以使用open-loop control 开环控制根据定时器填充水，而不是根据负载大小。

作文

In the field of control systems, the term open-loop control refers to a type of control mechanism that operates without feedback. This means that the system does not monitor its output or make adjustments based on the results. Instead, it relies solely on the input provided to it at the beginning of the process. To better understand this concept, we can look at a simple example: a toaster. When you set a toaster to a specific time, it will operate for that duration regardless of whether the toast is perfectly browned or burnt. This is a classic case of open-loop control (开环控制), where the input (time setting) dictates the output (toasting), but there is no feedback loop to adjust the process based on the outcome.Open-loop control systems are often simpler and less expensive to implement than closed-loop systems, which do use feedback. For instance, in industrial applications, an open-loop control might be used to fill containers with a predetermined volume of liquid. The system will dispense the liquid for a set amount of time, assuming that the flow rate is consistent. If the flow rate changes due to a malfunction or wear and tear, the system will not be able to correct itself, leading to potential overfilling or underfilling. This lack of adaptability is a significant drawback of open-loop control (开环控制).Despite their limitations, open-loop control systems can be quite effective in situations where the process is predictable and stable. They are often used in applications where precision is not critical, or where the cost of implementing a feedback system would outweigh the benefits. For example, many household appliances operate using open-loop control principles, such as washing machines that run through a fixed cycle based on user input without adjusting for the cleanliness of the clothes.Another area where open-loop control is commonly found is in irrigation systems. A farmer may set a timer to water crops for a certain duration without measuring the moisture level in the soil. While this can be effective under certain conditions, it may lead to overwatering or underwatering if the weather changes or if the soil's absorption rate varies. Thus, while open-loop control (开环控制) can be beneficial in straightforward scenarios, it is crucial to recognize when a more complex closed-loop system would provide better results.In conclusion, understanding open-loop control (开环控制) is essential for anyone involved in engineering, automation, or any field that requires process management. While these systems can be efficient and cost-effective for specific applications, they lack the adaptability that feedback mechanisms provide. As technology continues to advance, the integration of feedback into control systems has become increasingly prevalent, allowing for more precise and reliable outcomes. However, it is still important to appreciate the role of open-loop control in various applications and recognize when it is appropriate to employ such a system. By doing so, we can make informed decisions that enhance efficiency and effectiveness in our processes.

在控制系统领域，术语open-loop control（开环控制）指的是一种不依赖反馈的控制机制。这意味着系统不会监控其输出或根据结果进行调整。相反，它仅依赖于在过程开始时提供的输入。为了更好地理解这个概念，我们可以看一个简单的例子：烤面包机。当你将烤面包机设置为特定的时间时，它将无论如何运行该时间段，而不管吐司是完美的还是烧焦的。这是一个经典的open-loop control（开环控制）案例，其中输入（时间设置）决定输出（烘烤），但没有反馈回路来根据结果调整过程。与使用反馈的闭环系统相比，开环控制系统通常更简单且成本更低。例如，在工业应用中，开环控制可能用于以预定体积填充容器。系统将按设定时间分配液体，假设流速是一致的。如果由于故障或磨损而流速发生变化，系统将无法自行纠正，从而导致潜在的过量或不足填充。这是open-loop control（开环控制）的一个显著缺点。尽管存在这些局限性，但在过程可预测且稳定的情况下，open-loop control系统仍然可以非常有效。它们常用于精度不关键或实施反馈系统的成本超过收益的应用中。例如，许多家用电器都是基于open-loop control原理运行的，例如洗衣机，它们根据用户输入运行固定周期，而不调整衣物的清洁程度。另一个常见的open-loop control（开环控制）应用领域是灌溉系统。农民可能会设定一个定时器来在某个时间段内给作物浇水，而不测量土壤的湿度水平。虽然在某些条件下这可能是有效的，但如果天气变化或土壤的吸收率变化，可能会导致过度浇水或不足浇水。因此，尽管open-loop control（开环控制）在简单场景中可能是有益的，但重要的是要认识到何时更复杂的闭环系统会提供更好的结果。总之，理解open-loop control（开环控制）对于任何参与工程、自动化或任何需要过程管理的领域的人来说都是至关重要的。虽然这些系统在特定应用中可以高效且具有成本效益，但它们缺乏反馈机制所提供的适应性。随着技术的不断进步，反馈集成到控制系统中的现象变得越来越普遍，从而实现了更精确和可靠的结果。然而，仍然重要的是欣赏open-loop control在各种应用中的作用，并认识到何时适合采用这种系统。通过这样做，我们可以做出明智的决策，提高我们过程的效率和有效性。