Novel infrared camouflage technology based on electrochromism

2021 ◽  
pp. 1-28
Author(s):  
Zhonggen Ding ◽  
Feifei Lu ◽  
Yuge Han
Keyword(s):  
Control System ◽  
Cooperative Control ◽  
Fast Response ◽  
Calculation Model ◽  
Control Effect ◽  
Control Precision ◽  
High Control ◽  
Control Stability ◽  
Control System Model ◽  
Infrared Camouflage

Abstract Under the background of developing the advanced infrared camouflage technology, a novel idea of infrared regulation based on cooperative control of emissivity and temperature was proposed. Combining the traditional temperature calculation model, the infrared characteristic calculation model and the proportional-integral-differential (PID) control strategy, the corresponding adaptive infrared control system model was designed. By integrating the electrochromic material with the thin film resistor, the theoretical feasibility of the infrared control system was verified by the principle prototype. On this basis, the models of space target and its profiling decoy were established, and the infrared camouflage characteristics of profiling decoy in 3-5µm band and 8-14µm band were studied respectively. The results show that the profiling decoy with cooperative control of emissivity and temperature can achieve better infrared control effect than that of ordinary temperature control. The cooperative control system can effectively reduce the overshoot of radiation and has the ability of fast response, high control precision and control stability.

Study and Development on an Electro-Hydraulic Pressure Control System of the Riveting Machine

2013 ◽  
Vol 321-324 ◽  
pp. 1641-1644 ◽  
Author(s):  
Li Xu
Keyword(s):  
Control System ◽  
Control Parameter ◽  
Pressure Control ◽  
Fast Response ◽  
Hydraulic Pressure ◽  
Precise Control ◽  
Control Precision ◽  
Pressure Control System ◽  
Hydraulic Servo ◽  
High Control

An electro-hydraulic servo pressure control system was proposed, which meet the request of fast response, zero overstep and high control precision, based on analyzing the technique of riveting. The proper control parameter which is got by the debugging result of the PID arithmetic in PLC realized the precise control of systems pressure. In practice the device has good application value.

Research on the Temperature Control Algorithm of the Poultry Farm

2014 ◽  
Vol 602-605 ◽  
pp. 1206-1209
Author(s):  
Xiang Jie Niu
Keyword(s):  
Temperature Control ◽  
Control Algorithm ◽  
Good Control ◽  
Fast Response ◽  
System Stability ◽  
Poultry Farm ◽  
Control Effect ◽  
Control Precision ◽  
High Control ◽  
The Impact

The environment in poultry farm is a complex system with time-varying, nonlinear and pure lag. The traditional temperature control algorithm is difficult to obtain good control effect. In order to solve the issues of larger overshoot, vibration, low control accuracy and so on, this paper presents a fuzzy-PID estimated control algorithm. Firstly, the system identification is used to get more accurate system model. Then, using the fuzzy control rules improves the system stability precision, reduces the impact of the delay on the system and improves the adaptability of the system. Simulation results show that the proposed control strategy has a fast response, small overshoot, robustness, high control precision and so on. It provides a reference for intelligent control design of poultry temperature.

Control System of Moving Target Simulator

2012 ◽  
Vol 442 ◽  
pp. 488-492 ◽  
Author(s):  
Rong Chun Sun ◽  
Xue Song
Keyword(s):  
Control System ◽  
Image Motion ◽  
Stepper Motor ◽  
Moving Target ◽  
The Core ◽  
Control Precision ◽  
Ground Target ◽  
Design Requirements ◽  
High Control ◽  
Rotation Motion

To test the accuracy of image motion compensation of space camera, the moving target simulator was developed according to the principle of relative motion. As the core controller, PIC microcontroller controls DC motor to drive photoetching turntable rotating to simulate the relative linear velocity between ground target and aircraft, and the rotation motion is divided into uniform velocity rotation and sinusoidal velocity rotation. Furthermore, the simulation of drift angle of aircraft was realized by controlling stepper motor to drive the photoetching turntable deflecting, and the deflection includes uniform deflection, sinusoidal velocity deflection and specified angle positioning. The design of the hardware and software of control system has been completed and tested, and the experiment results show that the control system has high control precision and meets the design requirements.

BLDC Motor Torque Ripple Control Using Self-Tuning PID Fuzzy Control System

2016 ◽  
Vol 851 ◽  
pp. 459-463 ◽  
Author(s):  
Chao Wang ◽  
Zhuang Li ◽  
Guang Qing Kang ◽  
Chun Yan Zeng
Keyword(s):  
Control System ◽  
Fuzzy Control ◽  
Pid Control ◽  
Torque Ripple ◽  
Static Characteristic ◽  
Bldc Motor ◽  
Fuzzy Control System ◽  
Control Precision ◽  
Self Tuning ◽  
High Control

In order to suppress the torque ripple of the BLDC motor, at the same time considering the nonlinear and uncertainty of the BLDC motor, this paper mainly proposes a self-tuning PID fuzzy algorithm to control the torque ripple. Self-tuning PID fuzzy control is integrating the advantages of PID control system and fuzzy control system, using the error and change of error as inputs, and adjustment of PID parameter on-line by fuzzy control rules. Self-tuning PID fuzzy has the advantages of flexible and adaptable, and also have the characteristics of traditional PID control system such as broad applicability and high control precision. The results of simulation show that the self-tuning PID fuzzy control can suppress the torque ripple of BLDC motor effectively, the optimization of the dynamic and static characteristic of the system, satisfying the requirements of system performance, the superiority and reliability of the control strategy was verified.

Research on Hydraulic Control System of Straightening Machine with Nine Rolls for Plates Based on BP Neural Network PID Controller

2013 ◽  
Vol 820 ◽  
pp. 117-121 ◽  
Author(s):  
Song Li ◽  
Jin Chun Song ◽  
Guan Gan Ren ◽  
Yan Cai
Keyword(s):  
Neural Network ◽  
Control System ◽  
Bp Neural Network ◽  
Pid Controller ◽  
Mechanical Transmission ◽  
Hydraulic Control ◽  
Control Precision ◽  
Transmission Equipment ◽  
High Control ◽  
Neural Network Pid

A mechanical transmission equipment of traditional straightening machine for plates are driven by worm gear and worm, which causes small straightening force, slow pressing speed and low control precision. However, screwdown control system of straightening machine can be driven by hydraulic system, which will lead to large straightening force, rapid pressing speed and high control precision. This system was designed for straightening machine with nine rolls for plates, its transfer function was deduced, and the analysis on its stability and time response was conducted. A BP neural network PID controller was utilized in the system for improving dynamic characteristics. It can be concluded that the system responds rapidly, and stability and control precision are high if BP neural network PID controller is used in the system.

The Implementation of the Air Jet Loom High-Precision Weft Insertion Control System Based on FPGA

2012 ◽  
Vol 229-231 ◽  
pp. 2270-2275
Author(s):  
Rui Hong Yu ◽  
Yan Qin Li ◽  
Li Xin Li ◽  
Jia Bo Li
Keyword(s):  
Control System ◽  
High Precision ◽  
High Speed ◽  
Parallel Execution ◽  
Control Precision ◽  
Air Jet ◽  
Good Consistency ◽  
High Control ◽  
Hardware Circuit ◽  
Air Jet Loom

With the respect of the problem of that the control precision of air jet loom weft insertion control system can not satisfy the requirement of the high-speed loom, this article presented a high-precision weft insertion control system taking FPGA as the control core, and it designed hardware circuit and software framework. This control system generates weft insertion control signal which is figured out through the parallel execution of the FPGA program. The practice shows that the system owns the features of high control precision, good consistency and so on, and it has a significant importance to the high-speed development of air jet loom.

Research on Multi-Information Fusion Control System of Textile Workshop Environment

2011 ◽  
Vol 130-134 ◽  
pp. 3803-3806 ◽  
Author(s):  
Jing Zhao Li ◽  
Gao Xin Cheng
Keyword(s):  
Control System ◽  
Information Fusion ◽  
Back Propagation ◽  
Back Propagation Neural Network ◽  
Fusion Algorithm ◽  
Control Precision ◽  
Environment Control ◽  
High Control ◽  
Propagation Network ◽  
Hardware Circuit

Back propagation network can provide dynamic maps and deal with historical data by increasing self-loop. By using the improved circle back propagation neural network, Multi-information fusion algorithm are realized and used to environment control system of textile workshop. Hardware circuit of the system is designed with the embedded microprocessor and appropriate detection devices. The training and algorithmic design of self-loop back propagation network can be achieved by embedded systems programming based on the portable operating system. Application shows that the multi-information fusion control system of textile workshop Environment, which based on local self-loop back-propagation network, has high control precision.

The Design of Ball Mill Control System Base on Two-Cell Immune Controller

2011 ◽  
Vol 308-310 ◽  
pp. 1106-1110
Author(s):  
Gui Li Yuan ◽  
Yan Guang Xue
Keyword(s):  
Control System ◽  
Ball Mill ◽  
Dynamic Performance ◽  
Thermal Power ◽  
Engineering Application ◽  
Fast Response ◽  
Control Effect ◽  
Immune Control ◽  
Static Performance ◽  
Mill Control

Currently, Ball Mill is most used coal grinding equipment of pulverizing system of thermal power plant in China. Because of this system is multivariable, strong-coupling and serious time-delay, and it also has nonlinear, time-varying and distributed parameter characteristics. It is naturally difficult to be effective for such kind system to use PID regulation law and design multi-variable system by single-loop. So try more intelligent control for this kind system. Immune Control has fast response and robustness, especially; the Two-cell Immune Control has integration and memory characteristics, and improve the system to better control effect. It is particularly suitable for solving practical engineering application problems with robustness, adaptability and requirements of dynamic performance. So this paper use Two-cell Immune Control for the Ball Mill Control System, and make a large number of simulation experiments about rated parameter, non-rated parameter and adding disturbance situation, it has made a good dynamic and static performance under various conditions. These results confirm the validity of the design of Ball Mill Control System base on Two-cell Immune Controller.

Digital Control Damp Valve in Semi-Active Suspension

2012 ◽  
Vol 433-440 ◽  
pp. 2534-2540 ◽  
Author(s):  
Xiao Bin Ning ◽  
Ji Sheng Shen ◽  
Bin Meng ◽  
Jian Ruan
Keyword(s):  
Shock Absorber ◽  
Response Speed ◽  
Active Suspension ◽  
Fast Response ◽  
Stepping Motor ◽  
Flow Area ◽  
Control Precision ◽  
Throttle Valve ◽  
High Control ◽  
Electro Magnetic

It is known that for automotive semi-active suspension the damping of shock absorber shall be continuously adjustable. One approach for damping adjustment is via adjusting flow area of throttle valve of shock absorber using stepping motor. Throttle valve can be realized using electro-magnetic valve or any other type of driving valve. In order to be applied on semi-active suspension, the throttle valve is required to have high control precision, fast response speed, strong anti-pollution capability and etc.. In this paper a new type of digital valve is presented to control the flow area of shock absorber. The configuration is developed by the utilization of the two-motions-degree of freedom of a single spool. To solve the contradiction between the response speed and the quantitative accuracy which characterizes the previous valve of the same sort, a specially designed tracking program is adopted to the stepping motor control to smooth displacement output. Experimental results show that both static and dynamic performances of the digital valve can fulfill the requirement of semi-active suspension, which is valuable in the application of system such as semi-active suspension where the liquid flow needs to be controlled rapidly and accurately.

Study on the Simulating for Temperature Control System of the First Station of Heat Exchanger for Heating Network Based on Fuzzy PID of Double S7-200PLC

2012 ◽  
Vol 580 ◽  
pp. 338-341
Author(s):  
Zhuang Ma ◽  
Hao Miao Zhou ◽  
Yi Yang Zhang
Keyword(s):  
Control System ◽  
Heat Exchanger ◽  
Control Algorithm ◽  
Temperature Control System ◽  
Outlet Temperature ◽  
Fuzzy Pid ◽  
Matlab Simulation ◽  
Fuzzy Pid Control ◽  
Control Precision ◽  
High Control

This paper takes the first station of heat exchanger for heating network as an example. Because of the properties of nonlinear, large inertia, pure time – delay, it is controlled by the master slave control system based on double S7-200PLC. The accurate control of the outlet temperature of heat exchanger was realized by fuzzy PID control algorithm. The MATLAB simulation results show that the system has high control precision that it can be satisfied with the demands.

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