登录查看更多内容

点击“继续加入或登录”，即表示您同意遵守领英的《用户协议》、《隐私政策》及《Cookie 政策》。

How can you design a fault-tolerant DCS?

由人工智能和领英社区提供技术支持

A distributed control system (DCS) is a network of controllers, sensors, actuators, and communication devices that control and monitor complex industrial processes. A fault-tolerant DCS can maintain its functionality and performance even when some of its components fail or malfunction. This is crucial for ensuring safety, reliability, and efficiency in critical applications such as power plants, chemical plants, oil refineries, and water treatment facilities. In this article, you will learn how to design a fault-tolerant DCS using some basic principles and techniques.

在这篇协作文章中查找专家回答

由社区从 2 条内容中精选。了解更多

1 Identify the failure modes

The first step in designing a fault-tolerant DCS is to identify the possible failure modes that can affect the system. A failure mode is a way in which a component or a subsystem can fail to perform its intended function. For example, a controller can fail due to a power outage, a sensor can fail due to a faulty wiring, or a communication link can fail due to a noise interference. You can use tools such as failure mode and effects analysis (FMEA) or fault tree analysis (FTA) to systematically analyze the causes and consequences of each failure mode.

添加您的观点

Paul Ohryn

Controls and Instrumentation Specialist
举报内容
Identify and understand each fault and what type it is. Then capture and execute the required follow_ -up. Maintenance plans, spare parts, procedures, work flows. When/if the fault were to occur. What steps do we follow to correct.

已翻译

赞

2 Define the redundancy levels

The second step in designing a fault-tolerant DCS is to define the redundancy levels for each component or subsystem. Redundancy is the provision of more than one means of performing a function or achieving a goal. For example, you can have multiple controllers, sensors, or communication links that can take over the role of a failed one. Redundancy can be classified into four levels: no redundancy, passive redundancy, active redundancy, and hybrid redundancy. No redundancy means that there is only one component or subsystem for each function. Passive redundancy means that there are multiple components or subsystems for each function, but only one is active at a time, while the others are on standby. Active redundancy means that there are multiple components or subsystems for each function, and all of them are active at the same time, performing the same or different tasks. Hybrid redundancy means that there are multiple components or subsystems for each function, and some of them are active while others are on standby.

添加您的观点

Paul Ohryn

Controls and Instrumentation Specialist
举报内容
This will be based on tolerance acceptance. How critical the system is to profit and if it's safety related. Any safety related redundancy takes president in identifying and deploying a solution.

已翻译

赞

3 Design the fault detection and isolation mechanisms

The third step in designing a fault-tolerant DCS is to design the fault detection and isolation mechanisms for each component or subsystem. Fault detection is the process of identifying the presence and location of a fault in the system. Fault isolation is the process of identifying the cause and type of a fault in the system. Fault detection and isolation can be performed by various methods, such as self-testing, self-checking, voting, monitoring, diagnosis, or data fusion. These methods can use hardware, software, or both to compare the expected and actual outputs, inputs, or states of the components or subsystems.

添加您的观点

4 Design the fault recovery and reconfiguration strategies

The fourth step in designing a fault-tolerant DCS is to design the fault recovery and reconfiguration strategies for each component or subsystem. Fault recovery is the process of restoring the functionality and performance of a faulty component or subsystem. Fault reconfiguration is the process of adjusting the structure and behavior of the system to accommodate the faulty component or subsystem. Fault recovery and reconfiguration can be performed by various methods, such as switching, backup, repair, replacement, or adaptation. These methods can use hardware, software, or both to activate, deactivate, or modify the components or subsystems.

添加您的观点

5 Evaluate the fault tolerance performance

The fifth step in designing a fault-tolerant DCS is to evaluate the fault tolerance performance of the system. Fault tolerance performance is the measure of how well the system can cope with faults and maintain its functionality and performance. Fault tolerance performance can be evaluated by various criteria, such as availability, reliability, safety, maintainability, or efficiency. These criteria can be quantified by various metrics, such as mean time to failure, mean time to repair, failure rate, failure probability, or failure impact. You can use tools such as simulation, testing, or analysis to assess the fault tolerance performance of the system.

添加您的观点

6 Optimize the fault tolerance design

The sixth and final step in designing a fault-tolerant DCS is to optimize the fault tolerance design of the system. Fault tolerance design is the trade-off between the benefits and costs of implementing fault tolerance in the system. Benefits include increased functionality, performance, safety, reliability, and efficiency. Costs include increased complexity, size, weight, power consumption, and cost. You can use tools such as optimization algorithms, cost-benefit analysis, or multi-criteria decision making to find the optimal balance between the benefits and costs of fault tolerance in the system.

添加您的观点

7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

添加您的观点

Electronic Engineering

+ 关注

给文章评分

我们借助人工智能创建了此文章。您认为这篇文章怎么样？

很棒不太好

举报此文章

查看全部

How can you design a fault-tolerant DCS?

1

2

3

4

5

6

7

1 Identify the failure modes

2 Define the redundancy levels

3 Design the fault detection and isolation mechanisms

4 Design the fault recovery and reconfiguration strategies

5 Evaluate the fault tolerance performance

6 Optimize the fault tolerance design

7 Here’s what else to consider

Electronic Engineering

给文章评分

感谢您的反馈

更多Electronic Engineering相关文章

更多相关阅读内容

How can you design a fault-tolerant DCS?

1

2

3

4

5

6

7

1 Identify the failure modes

2 Define the redundancy levels

3 Design the fault detection and isolation mechanisms

4 Design the fault recovery and reconfiguration strategies

5 Evaluate the fault tolerance performance

6 Optimize the fault tolerance design

7 Here’s what else to consider

Electronic Engineering

给文章评分

感谢您的反馈

查看其他技能