Design of Smart Car Servosystem Based on Camera

2011 ◽  
Vol 383-390 ◽  
pp. 5923-5927 ◽  
Author(s):  
Lu Zhang ◽  
Qiu Hong Song
Keyword(s):  
Real Time ◽  
Control Algorithm ◽  
Digital Camera ◽  
Steering Control ◽  
Black Line ◽  
Loop Control ◽  
The Real ◽  
Development Platform ◽  
Low Power Cmos ◽  
Edge Detection Method

To depend on the development platform of the smart car contest, a smart car servosystem, based on Freescale 16-bit HCS12 micro-controller MC9S12XS128, is designed in this paper. The system uses the low-power CMOS digital camera OV6620 to obtain the real-time track information, and extracts the black line on the contest lane with the edge detection method to calculate the position deviation between the car and the black line, with the purpose of distinguishing the different shape of the lane. The nonlinear PD control algorithm for the steering control was given in this paper. Through the photo electrical encoder named YZ30D4S-2NA-200 to attain the real-time car speed, the system uses the nonlinear P strategy to achieve the speed closed-loop control. It is proved that the servosystem can achieve the automatic line patrol control, so as to make the smart car drive stably and quickly.

Modeling and Closed-Loop Control of Stretch Bending of Aluminum Rectangular Tubes

2003 ◽  
Vol 125 (1) ◽  
pp. 113-119 ◽  
Author(s):  
Hong Zhu ◽  
Kim A. Stelson
Keyword(s):  
Experimental Data ◽  
Real Time ◽  
Control Algorithm ◽  
Closed Loop ◽  
Strain History ◽  
Closed Loop Control ◽  
Loop Control ◽  
Stretch Bending ◽  
Rectangular Tube ◽  
Rectangular Tubes

During stretch bending, considerable springback will occur after a tube has been plastically bent. To predict the springback, a simplified two-flange model for stretch bending of a rectangular tube has been developed in which the strain history has been considered. A comparison has been made between the springback predicted by this model and experimental data, which shows rough agreement. Based on this model, a real time closed-loop control algorithm is developed.

Research of Paddle Wave-Maker Control System Based on Jonswap Spectrum

2014 ◽  
Vol 1006-1007 ◽  
pp. 679-684
Author(s):  
Xue Fei Huang ◽  
Mao Pang
Keyword(s):  
Control System ◽  
Energy Consumption ◽  
Energy Saving ◽  
Real Time ◽  
Personal Computer ◽  
Control Algorithm ◽  
Change Rate ◽  
The Real ◽  
Wave Maker ◽  
Jonswap Spectrum

According to large energy consumption, overload and re-reflection problemr, the control algorithm of wave-maker has been improved based on Jonswap spectrum. The control algorithm is comprised of the offline calculation of the control waveform and the real-time governing of the wave paddle. Offline algorithm is implemented on a personal computer, whereas paddle control is realized on a programmable automation controller. The experiments results show that the speed is continuous and stable, change rate of load has been optimized obviously and achieves the purpose of energy saving.

Colour Classification Using Entropy Algorithm in Real Time Colour Recognition System for Blindness People

2016 ◽  
Vol 1 ◽  
Author(s):  
Gurum Ahmad Pauzi
Keyword(s):  
Real Time ◽  
Digital Camera ◽  
Recognition System ◽  
The Real ◽  
Orange Yellow ◽  
Colour Image ◽  
Rgb Model

This article describes the real time instrumentation system to help blindness people for recognize a colour. Colour image captured by the digital camera, and it classified into ten basic colours names (black, brown, cyan, red, orange, yellow, green, blue, magenta, gray and white) by using entropy algorithm. The conclusion of colour classification will be informed to the user in sound or vocal information. This study has used two colour models HSV (hue, saturation and value) and RGB (red, green and blue). The accuracy of Classification using HSV has 90%, and RGB model has 71.5%.

Buoyancy Control for Low-Speed Under-Actuated AUVs

2014 ◽  
Vol 644-650 ◽  
pp. 735-740
Author(s):  
Yu Ling Ye
Keyword(s):  
Real Time ◽  
Control Algorithm ◽  
Sea Water ◽  
Water Tank ◽  
Low Speed ◽  
The Real ◽  
Control Approach ◽  
Control Scheme ◽  
Control Devices ◽  
Buoyancy Control

An engineering buoyancy control scheme was proposed to compensate the change of residual buoyancy for low-speed under-actuated AUVs. The buoyancy control system is made up of buoyancy controller and two sets of buoyancy control devices include: water tank, sea water pump, valve grouping, pipeline etc. Buoyancy control devices were configured to both head and tail part of the AUV symmetrical to its buoyant center. Depth control algorithm and buoyancy control algorithm were proposed separately. In the process of voyage at a constant depth, the real time speed, pitch angle and depth error were detected to evaluate the residual buoyancy indirectly, and then the real time buoyancy control was executed by pumping the water into or out of the tanks. The buoyancy control scheme was applied to the type of low-speed under-actuated AUV and simulation and experiments results show that the buoyancy control approach and the control laws are feasible and effective.

Virtual Dressing Based on the Kinect Peripherals

2013 ◽  
Vol 333-335 ◽  
pp. 2489-2492
Author(s):  
Chen Xi Cai ◽  
Ya Xia Liu ◽  
Shu Yuan Shang
Keyword(s):  
Real Time ◽  
Image Recognition ◽  
Program Structure ◽  
Function Structure ◽  
The Real ◽  
Development Platform ◽  
Recognition Function ◽  
Selection Of

This paper is the design of virtual dressing system based on the Kinect peripherals. The design mainly uses the real-time capture of Kinect somatosensory camera and the image recognition function to realize virtual dressing. This paper includes the introduction which is the use of virtual dressing system based on the Kinect peripherals, the selection of development platform, the function structure of the system, the program structure of design and virtual dressing implementation.

Full Software CNC System Based on RTLinux

2013 ◽  
Vol 423-426 ◽  
pp. 2809-2812
Author(s):  
Kun Qi Wang ◽  
Le Liu ◽  
Jing Qi Fan ◽  
Bao Chen Yang
Keyword(s):  
Real Time ◽  
Modular Design ◽  
System Management ◽  
Cnc System ◽  
C Language ◽  
The Real ◽  
Development Platform ◽  
Function Module ◽  
Circular Interpolation ◽  
Control Layer

In order to meet the real-time performance of the full software CNC system, the full software CNC based on RTLinux is designed. Linux+RTLinux system is used as development platform, the timer parameter is changed by the method of hardware interrupt, and the real-time requirement of the CNC system is solved. The idea of modular design is used on CNC system to divide the function module, and the software design of the full software CNC system based on RTLinux is completed. C language is used as the main development language, the development of functional modules of the system management layer and the control layer is realized. Linear, circular interpolation function of CNC system can be realized.

Analysis of Steering Control Strategy on Tractor's Hydraulic Steering By-Wire System

2014 ◽  
Vol 487 ◽  
pp. 630-634 ◽  
Author(s):  
Zhi Xiong Lu ◽  
Jiang Xue Chang ◽  
Xue Feng Bai ◽  
Yang Lu ◽  
Jun Gan Wu
Keyword(s):  
Control Algorithm ◽  
Fast Response ◽  
Steering System ◽  
Front Wheel ◽  
Bench Test ◽  
Steering Control ◽  
Loop Control ◽  
Response Characteristics ◽  
Hydraulic Steering ◽  
Wire System

The structure and working principle of the hydraulic steering by-wire system were described, and the optimal control algorithm of the system was obtained by the comparative analysis. Fuzzy control was chosen as the steering systems control algorithm, and it can realize closed-loop control of the front wheel corner. Matlab/Simulink was used for the simulation of the entire system. The simulation got the fuel tank displacements response curve, and verified the accuracy of the system design, which can provide a reference to the design of tractors steering system. Bench test was proposed to verify the accuracy of the system. The bench test results showed that the hydraulic steering by-wire controller can realize systems steering function well, and the system improved the control accuracy and fast response characteristics.

RTDS-Based Real-Time Simulation Model of Fiber Optical Current Transformer

2013 ◽  
Vol 448-453 ◽  
pp. 2578-2582
Author(s):  
Qing Liu ◽  
Dai Yin Fu ◽  
Tian Kun Sun ◽  
Dong Zhang
Keyword(s):  
Simulation Model ◽  
Real Time ◽  
Temperature Characteristic ◽  
Current Transformer ◽  
Equivalent Model ◽  
Loop Control ◽  
Real Time Simulation ◽  
The Real ◽  
Wave Plate ◽  
Time Simulation

This paper set up the real-time simulation model of FOCT by means of RTDS. The equivalent model of FOCTs digital closed-loop control system was created by simplifying that systems deviation and feedback .The temperature was also introduced in that model above according to the temperature change law of the optical fiber Verdet constant and λ/4 wave plate phase delay and the mathematical model about λ/4 wave plate parameters of the light intensity received by the detector. The results show that the real-time simulation model of FOCT is reasonable, and can simulate FOCTs steady state temperature characteristic. Its transient characteristic is not bad and it can be used for testing smart substations correlative equipment.

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