What are the main components of the dynamic model of any type of fan?

I think there are roughly two kinds of models you call models: First, the category of **format is composed of the following aspects: 1. **format**topic:

Signed below) is required to be accurate, concise, eye-catching, and novel. 2. Table of Contents in Format The table of contents is a brief list of the main paragraphs in the table. (Short ** does not need to be listed in the table of contents) 3. ** Format of the executive summary:

It is an excerpt of the main content of the article, which is required to be short, precise and complete. The number of words can be a few crosses, and no more than 300 words is appropriate. 4. Keywords or subject headings in the format of ** Keywords are selected from the title, summary and body of **, and are words with substantive significance for the central content of **.

Keywords are words that are used as content features for computer system indexing, which can be easily collected by information systems for readers to search. Each ** generally selects 3-8 words as keywords, and ranks them on a new line at the bottom left of the "Summary". Subject headings are normalized words, and when determining subject headings, it is necessary to analyze the topic of ** and convert them into standardized words in the thesaurus according to the indexing and assembly rules.

See Thesaurus of Chinese Topics and Thesaurus of Chinese in the World). 5. **Format**Text: (1) Introduction:

The introduction, also known as the preface, preface, and introduction, is used at the beginning of **. The introduction should generally write the author's intention in a general manner, explain the purpose and significance of the topic, and indicate the scope of writing. The introduction should be short and to the point.

a.Asking questions - arguments; b.analysis of the problem - arguments and arguments; c.

Problem solving-argumentation methods and procedures; d.Conclusion. 6. References in ** format A ** reference is the main literature that can be referred to or cited in research and writing, listed at the end of **.

References should be on a separate page, and the annotation method should be in accordance with the "GB7714-87 Post-text Reference Bibliography Rules". Chinese: Title--Author--Publication Information (Place, Author, Period) English:

Author--Title--Publication Information The requirements for the listed references are: (1) The listed references should be official publications for readers to verify. (2) The listed references should be marked with serial numbers, titles of works or articles, authors, and publication information.

Second, it is the category of the structure of the article itself, for example, an argument should be composed of several arguments, and how these arguments should be comprehensively discussed around the argument.

Dynamic models focus on the control logic of the system, examining the changes in objects and their relationships at any given time, describing these states involving timing and change. Dynamic models include state charts and event tracking charts. A statechart is a network of states and events that focuses on describing the dynamic behavior of each class of objects.

An event tracking diagram focuses on a characteristic "scenario" in the execution of a system, also known as a script, which is a sequence of events that completes a function of the system. Scripts typically start with an input event outside a system and end with an output event outside the system. A single object-to-object message is called an event, and a sequence of events that occur in a system in a particular environment is called a scene.

In a scenario, both this series of events and the objects that exchange events can be represented in an event trace graph. The main steps to build a dynamic model: (1).

Prepare typical interaction sequence scenarios; (2).Identify events between objects and build an event trace graph for each scene; (3).Prepare an event flow diagram for each system; (4).

build statecharts for classes with important dynamic behaviors; (5).Verify the consistency and completeness of events shared across different state charts.

The transfer function h(s) is used as a dynamic model to describe the dynamic response characteristics of the sensor, which has the following characteristics:

1) The transfer function h(s) reflects the characteristics of the sensor system itself, which is only related to the system structure parameters ai and bi, and has nothing to do with the input amount x(t). Therefore, the input-output relationship of a sensor can be described simply and appropriately by using the transfer function h(s).

2) For the sensor system described by the transfer function h(s), as long as you know any two of x(s), y(s), and h(s), you can easily find the third party. As long as the system is given an excitation signal x(t), the response of the system y(t) can be obtained, and the characteristics of the system can be determined without the need to understand the specifics of the complex system.

3) The same transfer function may represent two or more completely different physical systems, indicating that they have similar transmission characteristics. However, different physical systems have different degrees of system, i.e., through the coefficients ai and bi(i=0,1,2,67,n; j=0, 1,2,67,m).

4) For the sensor system composed of multiple links in series and parallel, if the impedance matching of each link is appropriate, the influence between them can be ignored, then the equivalent transfer function of the sensor can be solved according to the algebraic equation. The equivalent transfer function of a sensor system composed of n links in series is: The equivalent transfer function of a sensor system composed of n links in parallel is:

It can be seen that for the multi-link sensor measurement system, the input-output relationship is described by the transfer function, and it is easy to see the influence of each link on the system, and it is convenient to improve the measurement system.

5) When the sensor is complex or the basic parameters of the sensor are unknown, the transfer function can be obtained by experiment.

Compared with the blades of centrifugal pumps, why are the blades of the fan shorter, more numerous and the blades bent forward? The length of the fan blades determines the wind pressure, and like the water pump, the water pump determines the head. If the blade is long, the head or pressure head is large, and if the blade is short, it is the opposite.

The blades of the fan are many and short, because this fan is suitable for air conditioning or other places with low requirements for the pressure head, and the blades are characterized by low noise (because of the short, vibration, and the twisting angle of the fan blades: it is determined according to the wind pressure and air volume needs of the fan design, and the wind pressure requirements are large, and the power requirements are also large, and the air volume becomes smaller, of course, the angle of the fan can be °, and the maximum is 35°.

In general, weak current system engineering refers to the second type of application. These include:

1. TV signal engineering, such as TV monitoring system, cable TV.

2. Communication engineering, such as **.

3. Intelligent fire protection engineering.

4. Sound reinforcement and sound engineering, such as background broadcasting in the community and background in the building.

5. Integrated wiring engineering, mainly used for computer networks.

Since the basic meaning of weak current technology in intelligent buildings is still weak current technology in the original sense, we usually refer to weak current technology as weak current technology. With the rapid development of modern weak current and high technology, the application range of weak current technology in intelligent buildings is becoming more and more extensive. Such as computer network, building automation, intelligent fire protection system, monitoring system, intelligent broadcasting and so on.

The degree of application of weak current technology plays a decisive role in the intelligence of intelligent buildings.

1. Definition of weak current.

2. What systems are included in the weak current system?

3.Generic wiring system.

The integrated wiring system is the infrastructure of the digital information system for the construction of the intelligent office, and it is a structured wiring system that unifies the planning and design of all voice, data and other systems, providing information and intelligent material medium for the office, and supporting the comprehensive application of voice, data, and more in the future.

5.Broadcast sound system.

The composition of the broadcast sound system can be basically divided into four parts: sound source equipment, signal amplification and processing equipment, transmission line and speaker system.

Audio source equipment: usually CD players and recording decks, etc., in addition to microphones (such as microphones, electronic musical instruments).

Signal amplification and processing equipment: including mixers, preamplifiers, power amplifiers, various controllers and audio processing equipment. The first task of this part of the equipment is signal amplification, followed by signal selection.

Transmission line: Although the transmission line is simple, it has different requirements depending on the system and transmission mode. For auditoriums, theaters, etc., because the distance between the power amplifier and the speaker is not far, the direct pick-up mode of low resistance and high current is generally adopted, and the transmission line requires a special speaker line, while for the public broadcasting system, due to the wide service area and long distance, in order to reduce the loss caused by the transmission line, the high-voltage transmission mode is often adopted, and the transmission line is not required to be high because the transmission current is small.

Speaker system: The speaker system requires the entire system to be matched, and at the same time, its location must be realistic.

Nowadays, with the rapid development of computer technology and the rapid and powerful software and hardware functions, the perfect combination of various weak current system engineering and computer technology has made the previous classifications no longer as clear as before.

Modern intelligent buildings are inseparable from weak electricity. Weak current engineering is intelligent building system integration engineering.

ELV engineering is a big concept that encompasses many systems.

1. Ordinary monitoring system;

2. Building intercom system;

3. an access control system;

4. Background**;

Professional construction team of weak current engineering, intelligent system integration, design and construction of weak current systems such as access control, intercom, broadcasting, and perimeter alarm.

Weak current works include weak current wells, broadband, fire protection, and fixing**.

It mainly includes: electronic control, electrical signals, etc., mainly relying on sensors.

Common weak current systems include: CCTV monitoring system,

Weak current projects are mainly used for: communication, network, monitoring, alarm access control, patrol, attendance, public broadcasting, etc.

System integration is a highly technical system engineering, to really do a good job in the integration of a building weak current system, not only requires the weak current engineer to have a deep grasp of the function, technical parameters and construction, installation, commissioning and so on of the weak current system products, but also has a more comprehensive understanding of the building's water supply and drainage system, power supply and distribution system, ventilation and air conditioning system, lighting system, elevator system, etc.

At the same time, because the building weak current system involves communication, computer, control and display and other high-tech with high technical content and very fast development, so in the specific implementation process of system integration, in the solution of many technical details of the problem, the support and cooperation of professional and technical personnel in all aspects are also needed.

Nanjing Zhongzi Road Science and Technology Co., Ltd. is a high-tech enterprise specializing in the design and implementation of building intelligent systems. Enterprises with high-level qualifications such as weak current intelligent engineering qualifications, urban and road lighting engineering qualifications, and security qualifications have strong industry influence and good user reputation in the field of building intelligent engineering. It has ISO9001 quality system certification and ISO14001:

2015 Environmental Management System Certification, Jiangsu Quality and Integrity AAA Brand Enterprise, Industry Leading Advanced Enterprise, Jiangsu Quality and Integrity Enterprise and other honorary titles.

Air conditioning control, ventilation control, water supply and drainage control, elevator control, lighting control.

There is a built-in DFIG detailed value grid-connected modeling, you can enter the demo in the command window, and then follow the following figure.

The red path finds the model.

2.For power quality, the main consideration is also the voltage and current of the grid-connected point, i.e. B575, and of course, the fan outlet can also be considered.

B25 voltage and current.

1) The axial length is not limited, and the length of the impeller can be selected according to the needs of different use judgments.

2) The air flow flows through the impeller and is affected by the two forces of the blades, so the air flow can reach a long distance;

3) No turbulent flow, uniform air outlet;

4) Because the air flow is forced to rotate in the impeller, the indenter loss is large and the efficiency is low;