Applied Mechanics and Materials Vols. 651-653

Abstract: In this paper, a method based on Ziegler Nichols - frequency response of the adaptive PID controller is proposed. The control circuit identifies online important critical frequency response characteristics of process object through input and output data in the normal process operation, and then the system online update PID controller parameters based on Ziegler - Nichols tuning rules or by the improved method. The adaptive process of PID controller does not require any prior knowledge of the system, but it can always guarantee control circuit run in the best condition. The results show that the method has stronger robustness and adaptive ability.

Abstract: The related technologies with shipboard artillery ammunition automatic demolition device uses is described detailed in this paper, and its function of the device is analyzed in detail. The reliability evaluation analysis method of device is proposed in this paper. The economic benefit of shipboard artillery ammunition automatic demolition device is evaluated with following three aspects such as : working hours, employee training and workshop . It is obvious that the production and application of device has profound significance.

Abstract: The main research object is the graphics generation and display system based on FPGA, the system is mainly used for the integrated display of aircraft cockpit. The display system has the characteristics of large amount of data, real-time processing in the graphics generation. According to the characters, the paper uses programmable logic device due to FPGA has the advantages of high speed, real time. In order to further improve the efficiency of the system, the paper also designs the ping-pong operation of double SSRAM(Synchronous Static Random Access Memory) at the same time. Through the experiment, the system can run well and achieve the desired objectives.

Abstract: With the development of communication and computer, the importance of digital filter highlighted. FIR digital filter can satisfy arbitrary amplitude frequency characteristic, at the same time, it can keep accurate and strict linear phase characteristic. So it has been most widely used in digital signal processing (DSP) in the modern society. After comparing several kinds of FIR digital filter methods, this paper studies in details the realization of principle and method of FIR filter based on FPGA and MATLAB while adopting a distributed algorithm. Finally the optimal design method is proposed and simulated.

Abstract: The past and present situation of shipboard artillery ammunition demolition processing are summarized in this paper. The shipboard artillery ammunition automatic demolition technology is put forward for meeting the needs of modern war in this paper. This technology will greatly improve the rear and factory's comprehensive demolition ability to scrap shipboard artillery ammunition. It ensures the mass demolition processing for scrap shipboard artillery ammunition. Also, it will has a profound influence on our ammunition management.

Abstract: The flexible crankshaft may influence diesel’s instantaneous speed when diesel runs at high speed and load. In this paper the nine-degree crankshaft dynamic model is set up aim at 6-135 type diesels, and studies the instantaneous speed fluctuating rules at different position of crankshaft. The Simulating outcome shows that the obvious difference and rules are exist in instantaneous speed of all degrees: The instantaneous speed waveform corresponding to each cylinder accomplishes a change of several small wave crests to one beg crest gradually from freedom end to flywheel end. At last the simulating outcome are compared to experimental measured instantaneous speed of freedom end and flywheel end, they are in agreement at both wave shape and frequency spectrum sides, then the model’s effect is proved.

Abstract: With the growing shortage of water today, in order to control the flow of pipe conveyance, it is essential for further study of automatic control valves, especially the automatic control technology of control valve. In this paper, by using programmable control and signal transmission technologies etc. a prototype model of hydraulic valve position control is constructed. Prototype model is designed as the closed-loop of position control system, by using high-precision angular displacement sensor detecting the position of the valve plate, converting the output signal of sensor into an industrial process signal 4-20mA with the low-drift transmitter chip XTR101, and with modular PLC as system control center, using three-phase inverter controlling the steering and speed of motor and cooperating with closed pump control system for hydraulic drive, it achieves the closed-loop control hydraulic valve position. This paper provides some technical support for the better use of water resources.

Abstract: the exhaust turbine supercharger in the process of manufacturing is made up of many enterprises to participate in the production and management. Production organization form of the differences is determined by the scale of production and mode of operation. Parts of casting blank and parts processing has formed a complete industrial chain. Complete parts processing and manufacturing industry chain has failed to form the advantage of the products. Many companies, management can not meet the user's demand. Also can't satisfy the hosts, scale and qualification requirements of production enterprises. Enterprise management has been formed a consortium. Enterprise production scale and qualification of such as to meet the requirement of enterprises for internal combustion engine accessories. The manufacture of parts and exhaust turbocharger parts processing and assembly in production process can be controlled. Is helpful to the enterprise's development and improvement of product quality.

Abstract: We present a Three-dimension WLAN based indoor localization system for mobile device. It is based on the RSS of the wireless signal and estimates the target node’s localization. Multi-times measurement and filter will improve the accuracy of the localization. In the end this system achieves the Three-dimension indoor localization system.

Abstract: Underwater target radiated-noise of time domain is significant important in underwater defense and security. Its simulation model based on propeller influencing is considered in this paper. Linear difference equation representing relationship between underwater target radiated-noise of time domain and propeller induced noise is fitted from the data. Dynamical programming is employed to investigate the control of the target radiated-noise. Experimental results show the efficiency of our model and the control methods.