Your question is a bit vague. Let me give it a try and take a look.
A model is an expression form of the system, process, thing or concept under study. It can also refer to the basis for Samples made by experiments, enlarging or reducing drawings, generally used for exhibitions or experiments, or molds for casting machine parts, etc.
Classification
Classification by purpose
Real estate model (can be divided into residential model, commercial model, apartment model, villa model, landmark), urban planning model, regional model, digital model, environmental landscape model, scheme model, industrial model (can be divided into military model, mechanical model, Vehicle models), bridge models, etc.;
Photos of model classification (14 photos)
Classified by expression form
Modern architectural models, [3] models;< /p>
Classified by product attributes
Business nature model, public building facility model;
Classified by technology
Traditional model, digital Sand table, multimedia model, virtual tour, semi-environment model, interactive projection sand table, etc.; 3D animated model
Classified by material
Wooden model, crystal model, ABS resin model, metal model wait.
Models can take various forms, and there is no unified classification principle. According to the expression form of the model, it can be divided into physical model, mathematical model, structural model and simulation model.
Aviation model (9 photos)
Physical model
Also known as physical model, it can be divided into physical model and analog model.
① Physical model: a physical object that is scaled down (or enlarged or the same size as the original system) manufactured based on the similarity theory, such as aircraft models in wind tunnel experiments and hydraulic system experimental models. , building models, ship models, etc.
② Analogy model: In systems in different fields of physics (mechanics, electricity, thermal, fluid mechanics, etc.), their respective variables sometimes obey the same laws. According to this *** Laws can produce analogy and analogy models with completely different physical meanings. For example, under certain conditions, the pressure response of a pneumatic system composed of a throttle valve and an air volume has a similar pattern to the output voltage characteristics of a circuit composed of a resistor and a capacitor. Therefore, a circuit that is easier to experiment with can be used to simulate the pneumatic system. .
Mathematical model
A type of model described in mathematical language. A mathematical model can be one or a set of algebraic equations, differential equations, difference equations, integral equations or statistical equations, or some appropriate combination thereof. These equations can quantitatively or qualitatively describe the relationship between the variables of the system. Reciprocity or causation. In addition to mathematical models described by equations, there are also models described by other mathematical tools, such as algebra, geometry, topology, mathematical logic, etc. It should be pointed out that mathematical models describe the behavior and characteristics of the system rather than the actual structure of the system.
Structural model
A model that mainly reflects the structural characteristics and causal relationships of the system. An important type of model among structural models is graphical models. In addition, compartment models commonly used in biological system analysis (see compartment model identification) are also structural models. Structural model is an effective means to study complex systems.
Simulation model
A model expressed through a program running on a digital, analog, or hybrid computer. Using appropriate simulation languages ??or programs,
Navigation models (6 photos)
Physical models, mathematical models and structural models can generally be transformed into simulation models [4]. Regarding the impact of different control strategies or design variables on the system, or the impact that the system may have after being subjected to certain disturbances, it is best to conduct experiments on the system itself, but this is not always feasible. There are many reasons, for example: the experiment may be expensive; the system may be unstable, and the experiment may destroy the balance of the system and cause danger; the time constant of the system is large and the experiment takes a long time; the system to be designed has not yet been designed. There is no such thing. In such cases, it is effective to establish a simulation model of the system. For example, the biological methanation process is an anaerobic fermentation process that produces methane due to the decomposition of bacteria. Based on the knowledge of biochemistry, a simulation model of the process can be established, the optimal steady-state value of the process can be sought through computers, and various starting methods can be studied.
These studies are almost impossible to perform on the system itself because it is technically difficult to keep the process in steady state and the start-up of the biomethanation reaction is slow, taking several weeks. But if you use a (simulation) model to simulate it on a computer, the start-up process of the methanation reaction only takes a few minutes.
Digital model is also called digital sandbox, multimedia sandbox, digital sandbox system, etc. It is modeled using three-dimensional techniques to simulate a three-dimensional building, scene, and effect, which can be freely played in the digital scene. Walk, gallop, fly, zoom, from the whole to the part and then from the part to the whole, there is no limit. Three-dimensional digital cities, virtual model rooms, traffic bridge simulations, garden planning three-dimensional visualization, ancient building three-dimensional simulations, and mechanical industrial equipment simulation demonstrations built with three-dimensional digital technology use PCs and display systems to display, explain, command, explain, etc. effect.
Multimedia sandbox is a new form of physical model expression that uses projection equipment combined with physical planning models to create dynamic plane animations through precise alignment and projects them onto the physical sandbox, thereby producing dynamic changes.
Digital models integrate sound, light, electricity, images, three-dimensional animation and computer program control technology with physical models to fully reflect the characteristics of the display content and achieve a vivid and varied dynamic visual effect. . It is a brand new experience for visitors and can generate a strong excitement. Digital model is a new concept proposed by Shenzhen Saiye Model, the largest and earliest model design and production company in China. Its self-developed digital simulation technology has obtained national patents and has been concretely reflected in its Shaoguan Planning Department and Shaoguan City Overall Planning Project. The new term digital model will replace traditional architectural models in the near future and become another new highlight of display content. The digital model goes beyond the monotonous physical model sand table display method. Based on the traditional sand table, multimedia automation procedures are added to fully demonstrate the location characteristics, seasonal changes and other rich dynamic visual effects. It is a brand new experience for customers and can produce a strong visual shock. Customers can also choose to watch the corresponding display content through the touch screen, which is simple and convenient, greatly improving the interactive effect of the entire display.
5 Industrial Model
Definition
Industrial model, commonly known as prototype, first board model, and rapid prototyping, the main production methods include CNC processing, laser rapid prototyping and Silicone molds are produced in small batches and are widely used in the design and development stage of new industrial products. Physical models that are consistent with the design can be processed in the shortest time. Designers can confirm product appearance and function tests to improve the design plan
< p>. To achieve the purpose of reducing development costs, shortening the development cycle and quickly gaining customer recognition.Scope of application
Digital products (mobile phones, telephones, digital photo frames, USB headsets, cameras.
Home appliances and medical products (TVs, computers, air conditioners , vacuum cleaners, printers, copiers. washing machines, kettles, massagers. B-ultrasounds
3. Auto parts (car dashboards, doors, car air conditioners, car DVDs, lights. Reverse disks, bumpers )
Today's industrial models are not as simple as prototypes. They have transformed from digital products, household medical products, and auto parts into large-scale mechanical models and engineering models. They are even larger than architectural models, and their craftsmanship is huge. The difficulty level is further increased.