Expert tips on customs data usage

List of contents of this article:

• 1, matlab draws bode diagrams, dual input and dual output system There should be several sets of bode diagrams
• 2, How does the fire linkage system distinguish between single input and multi-input and output modules?
• 3、 What technology is multi-channel transmission of different information in memo?
• 4, To analyze what methods are commonly used in multi-input, multi-output and nonlinear systems

ma Tlab draws a bode diagram. There should be several sets of bode diagrams in the dual input and dual output system

Bird diagram is a diagram method of system frequency response. UncleThe German diagram is composed of an amplitude map and a phase angle diagram, both of which are drawn according to the logarithm of frequency, so the Bird diagram is often also called a logarithmic coordinate map. When making a Bird diagram, the logarithmic frequency characteristics are drawn by the method of line approximation.

Transfer function: 25 --- 0.5 s^2 + s T = T = zpk (-1/0.354, [0 -2 -1/.11], 25) Zero/pole/gain: 25 (S+825)--- s (s+2) (s+091) bode (GH, T) hope to help you.

bode (G, w) amplitude, phase. You can use magdb = 20*log10 (mAg) Convert amplitude to decibel value Related functions of MATLAB frequency analysis Table 1 Usage and function description of relevant functions of frequency domain analysis Nyquist (sys) Draw system Nyquist diagram.

A better way is not to let it draw when you call the bode function, but return the data directly, for example: [mag, phase, w] = bode (sys); if you draw a diagram and then want to extract information from the diagram, although it can be done, it is much more tedious, and And there may still be compatibility problems in different matlab versions.

design toolbox, set the input and output ports of your model, and then draw a bode diagram. The following picture is a screenshot. The MATLAB version is different.There is no analysis menu page, but in control design. The whole process involves the basic usage of modeling and toolboxes, which can't be made clear in a sentence or two.

Extract the bode diagram data in matlab as follows: 1. We now write the code to draw the graphics in matlab. 2. Add [mag, phase, w] = bode (sys) after the code; 3. At this time, we can see the data we need on the workplace interface.

How does the fire linkage system distinguish between single input and multi-input and output modules?

1. The fire CRT linkage system is divided into input module, single input single output module, dual input and double output module and output module according to the input and output mode of the signal. The input module receives the passive alarm signals sent by various alarm detection devices on the site in a timely manner in the fire protection system, and realizes the transmission of signals to the fire alarm controller.

2. What is the difference between single output and multi-output in the fire protection module? Single output: The module has an address, which can be linked to control the simultaneous operation of one or several devices. Multi-output: The module has multiple addresses, which can link multiple devices to perform different actions. In fact, multiple control modules are made together.

3. Output module: Now it is generally replaced by linkage control module, which is divided into single input single output module and dual input dual output module.The single module is used for linkage control of one input and one output device, such as plate smoke exhaust, normally closed fire valve, etc. Dual modules are used to link and control equipment of two input and output states, such as fireproof roller shutter doors.

4. The single input and output module is different from the dual input and output module or multi-input and output module. The output means that the module has the function of output 24 to control the power supply to control the external control equipment, and the input means that the module has the function of feedbacking the working status of the device to the host through the passive contact of the device.

5. Single output: The module has an address, which can control the simultaneous operation of one or several devices. Multi-output: The module has multiple addresses, which can link multiple devices to perform different actions. In fact, multiple control modules are made together. Japanese systems often adopt this type, called XXXX repeater.

What technology is multi-channel transmission of different information in memo?

1. MIMO technology was first proposed by Marconi in 1908. It uses multiple antennas at the transmitting end to transmit signals independently, and at the same time receives and restores the original information with multiple antennas at the receiving end, which can achieve a higher user rate at a lower cost.

2. Subset technology is a technology used to overcome channel decay, which is mainly divided into two categories: macro subset and differential subset; differential subset can be divided into spatial subset, frequency subset, polarization subset, field component subset, angle subset and time subset.

3. Time-div reuse technology (time-divIsion multiplexing, TDM) is a communication technology that intertwines different signals in different periods of time and transmits them along the same channel; at the receiving end, some method is used to extract the signals in each period of time and restore them to the original signal.

4. Rental modulation technology is widely used in telephone communication, cable TV and other fields. Rental modulation is an effective multi-way transmission method. Unlike frequency division multiplex technology, in rental modulation technology, each message does not have a separate channel, but shares a channel.

What methods are commonly used in multi-input, multi-output and nonlinear systems

These methods generally use a multi-layer feedforward neural network to map the inverse function of the sensor characteristic curve as a correction link. The algorithm is relatively simple and easy to implement.

Descriptive function method, segmental linearization method, small parameter method, etc. all belong to this method. Direct analysis method The analysis method based on the actual or simplified nonlinear differential equation of the direct processing system can be applied regardless of the degree of nonlinearity.

The methods to describe the system usually include input and output method and state variable analysis method, also known as state space method.Usually, the analysis of the system's time domain or frequency domain uses the input and output method, that is, the main concern is the relationship between the input and output of the system, regardless of the relevant problems within the system.

Backstepping Backstepping is one of the most commonly used methods in nonlinear system controller design, which is more suitable for online control and can reduce the time of online computing.

There are more than 10 methods of factor analysis, such as center of gravity method, image analysis method, maximum likelihood solution, minimum flat method, Alpha extraction method, Rao typical extraction method, etc.