PWW-based pneumatic system CAD

Pneumatic system based on stomach, from the introduction of giant 1 so 61. This 1 and 1 rib 2 plus 1 in the global application of tears, for people to escape e-commerce has created a good external facilities and computing environment, he 1.1 The rise of such as 1 and the blood 81 led to the booming of e-commerce. E-commerce has become one of the most promising applications in the heart. In order to make full use of the new opportunities brought by the 1 601 payment 1 to the business, the traditional industry must catch up, pneumatic, industry is also exceptional. Pneumatic 1 products are nothing more than two kinds of pneumatic components, and the other is pneumatic systems. Under the assumption, if you can realize the design and simulation of the pneumatic circuit on the Internet, it will not only be convenient for users, but also can increase the visibility of the merchants and increase the sales volume of its products. Therefore, a computer-aided design system for implementing pneumatic circuit design on the Internet is necessary. The purpose of this study was to develop a pneumatic 1 system based on Internet identification services. When the user enters the hall pneumatic system design, board this website, input the system principle and the required indicators, the server can automatically calculate the dynamic characteristics of the system, and give the parameters of the components that meet the index, and finally can be from the product library of each manufacturer. Choose the right product.

1 The simulation system consists of a sub-calibration simulation system consisting of a morphing loop forming a module timing module simulation module result display module. The functions of each module are described in detail below.

1.1 The shape loop module can be used in the browser. The melon interface conveniently realizes the addition or deletion of pneumatic components, and the component connection pneumatic components are selected to form a pneumatic stalk. After the juice system is generated, the total file information and the pneumatic component information and circuit are stored. Topology.

1.2, the user can use the familiar trapezoid to design the timing action of the pneumatic system, and the result is a sequential action logic file.

1.3 The simulation module uses the system information file generated by the loop constituent module and the timing action logic file generated by the timing shuttle block as input parameters. Into the digital simulation.

1.4 After the simulation of the shuttle block is completed, the data files formed by the simulation results are converted into corresponding shapes and texts, and the shapes and texts are used by the human 3 to loosen through the browser. 2 The simulation system realizes the scheme argument 2.1 The programming language The selection of the simulation system is implemented in the Jiajiejie way, so the language used must be cross-platform. The popular cross-platform fiWfJAVA.AVASCRIIIWIJSCRIPTRAr screwing in addition to the simulation system involves the selection of pneumatic parts. Have to deal with the network database. Finally, since the emulation system is implemented on the browser, it must be guaranteed to be able to browse normally on most browsers. There are two kinds of mainstream browsers nowadays, and the one browser of Microsoft is IE.4iViMKHlNelSmprComuiiinUi. The browser is also called to describe whether the browser can pay for different programs. In the same way, there are programs that are allowed by 1 and 0. , people and. But the foot is in.

3, the emblem, the scope of adaptation is limited to the browser itself, that is, it can be used for various dynamic webpage effects, but can not communicate with 1 server, the application related to tearing the database is powerless, thus eliminating the swearing 3 We decided to use the development of the pneumatic system from the language.

This research was awarded 12000 by the Harbin Institute of Technology, the Department of Interdisciplinary Research Fund.

2.2 Structure selection of the simulation system The current simulation environment based on the 1st mode follows the following system: 2.2.1 Server-side simulation 1 The user uses 1 to fill in the simulation parameters, and submits the order to the server and starts the simulation by pressing the submit button. . Here, 0, 10 out, 1637 1 plus 6 sinks to achieve data transfer to the server. 001 is the interface between the browser and the server. It transmits instructions from the browser to the server, and then the server interprets it to start the corresponding program in the server.

Due to the unevenness of the client's grades, the simulation speed and effect are different.

Downloading all applets to the client is not very realistic at the current speed. According to statistics, the maximum time delay that an individual can endure with a browser and download a homepage is 30 seconds. The true meaning of the emulator applet is no smaller than 300. With the current high-speed elbow, for example, the maximum download speed of 1 is about 68, and it takes 50 seconds. If the shape and database are counted, Download time will be an unbearable factor.

Did not take full advantage of the server's high-speed computing speed.

2.2.3 Client and server side co-simulation 3 programs are not universal.

Since it is written by the user and the 001 program can access local files, there is a security hole. To this end, 13 pairs of these, the implementation of the program adds a lot of artificial restrictions.

For each connection, the server must open a separate machine to crash.

2.2.2 Based on JaVaApplet client emulation 2 1. Use the sound 3. Run 8 results based on 3, 1 pays for client simulation is achieved by loading into plet. The user loads the applet into the browser and simulates it on the client.

The simulation is done on a remote server. The simulation results are passed to the client and visualized.

The client and the server share the task together, reducing the burden on the server.

It has a separate upstream server that enables dynamic exchange of information between the client and the server.

Because the pneumatic system simulation system needs to realize the selection of pneumatic components, that is, the database needs to be queried, and because of the browser pair, the security restriction of the applet makes the applet unable to access the local file, which makes 1 unable to use the local database, and must Use a network database. This inevitably involves the information exchange between the client and the server. So I decided to use the first solution to co-simulate the client and server. Its detailed working principle 41 First, the user downloads the applet through the browser to establish a modeling environment in the browser.

The user establishes a loop by means of drag and drop, connection, and the like.

When selecting the type, the meter is connected with the 3 server by the 3161, and the Zhiyang server uses the yang 60008, the 敕Pang 敕, the 衿魃 某 8 to exchange information, and obtain the model of the pneumatic component.

If the server obtains the component model, the information is transmitted back to the appfet to implement the selection function. After the user completes the loop, the user is notified that the server loop is completed and the loop topology relationship and component information are transmitted to the server.

The server saves the obtained information as a temporary file and calls the emulator with this temporary file name as a parameter.

横手九美子, air pressure システ シミ シミ レシ ッッレ ッッレ ッッレ ッッレ ッッレ , , , , , , , , , , , 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广 广The main factors following the 32nd page are temperature and oil contamination. The change in temperature affects the spring rate of the elastic support in the servo valve, causing the operating point of the servo valve to drift. Oil contamination can cause the nozzle of the amplifier to block the friction of the slide valve and other faults, which makes the dynamic performance of the electro-hydraulic servo valve worse. Therefore, it is necessary to strictly keep the oil clean during use and maintenance, and pay attention to the oil temperature change.

The development of the 5 wheel brake control system From the current application situation of the aircraft wheel brake control system at home and abroad, the reference deceleration control is adopted, and the reference speed is required to simulate the aircraft running speed to be accurate and the efficiency can be high; the relative slip rate control is adopted. Because of the different runway conditions, the value of the optimal slip ratio is also different. It is sometimes not the best with one slip rate.

With the development of automatic control computer application technology and the maturity of electromechanical liquidization technology, the above control system will be continuously improved.

Extreme value control has been studied abroad, and the benchmark for extreme value control varies with the runway conditions. It follows the optimal slip rate and maintains optimal control at all times. From the transmission aspect, telex will be widely used, digital telex will be realized step by step, and the redundancy will be configured to ensure reliable braking to improve the safety of the aircraft.

1 Yang Guofan. Aircraft fluid transmission and control. Air Force Engineering College, 1997, 2 Wang Zhanlin and so on. The main development trend of aircraft hydraulic system, hydraulic pneumatic and dense 3 Wang Xianchao. The application of servo valves in aircraft anti-skid braking systems. Journal of Naval Aeronautical Engineering Institute, 199 points Supplement 93 Author Wang Xiuxia, Department of Mechanical Engineering, Naval Aeronautical Engineering Institute 264001

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