Chapter 8 establishes the relationship between the input and output power spectral densities of a linear system. Limitations on results are carefully detailed and the case of oscillator noise is considered. The theory is extended to multiple input-multiple output systems.

Linear System Theory

Remote sensing of on-road vehicle emissions: Mechanism, applications and a case study from Hong Kong

This paper is concerned with boundary control for an axially moving belt system with high acceleration/deceleration subject to the input saturation constraint. The dynamics of belt system is expressed by a nonhomogeneous hyperbolic partial differential equation coupled with an ordinary differential equation. First, state feedback boundary control is designed for the case that the boundary states of the belt system can be measured. Subsequently, output feedback boundary control is developed when some of the system states can not be accurately obtained. The well-posedness and the uniformly bounded stability of the closed-loop system are achieved through rigorous mathematical analysis. In addition, high-gain observers are utilized to estimate those unmeasurable states, the auxiliary system is introduced to eliminate the constraint effects of the input saturation, and the disturbance observer is adopted to cope with unknown boundary disturbance. Finally, the control performance of the belt system is illustrated by carrying out numerical simulations.

Output feedback boundary control of an axially moving system with input saturation constraint

[Foreword] Welcome to the Transactions on Media Technology and Applications:The Institute of Image Information and Television Engineers (ITE) has decided to launch a new open access journal, titled "Media Technology and Applications" (MTA).

Adaptive unified motion control of mobile manipulators

The invention relates to an automatic optical inspection method for a printed circuit board comprising a resistance element. After the characteristics of welding spots are extracted, the welding spots are correctly classified into three types of normality, starved solder and missing parts through a classifier of a support vector machine. The automatic optical inspection method is suitable for classification and detection of the special welding spots during production. The automatic optical inspection method comprises the following steps of: converting red areas in welding spot images into a grayscale image and a binary image; calculating grayscale image-based mean values and standard deviations, and binary image-based height-lightness ratio, cross correlation and area of area color; and classifying the welding spots according to the quality by using the mean values, the variance, the height-lightness ratio and the similarity level of the welding spot images in the classifier of the support vector machine. Wrong welding spot types are classified through the mean values, the variance, the height-lightness ratio and the area characteristics of the welding spots. After the quality of the welding spots is distinguished, the wrong welding spots can be further classified into two types of starved solder and missing parts by the method.

Automatic optical inspection method for printed circuit board comprising resistance element

For a class of linear discrete-time uncertain systems, a feedback feed-forward iterative learning control ILC scheme is proposed, which is comprised of an iterative learning controller and two current iteration feedback controllers. The iterative learning controller is used to improve the performance along the iteration direction and the feedback controllers are used to improve the performance along the time direction. First of all, the uncertain feedback feed-forward ILC system is presented by an uncertain two-dimensional Roesser model system. Then, two robust control schemes are proposed. One can ensure that the feedback feed-forward ILC system is bounded-input bounded-output stable along time direction, and the other can ensure that the feedback feed-forward ILC system is asymptotically stable along time direction. Both schemes can guarantee the system is robust monotonically convergent along the iteration direction. Third, the robust convergent sufficient conditions are given, which contains a linear matrix inequality LMI. Moreover, the LMI can be used to determine the gain matrix of the feedback feed-forward iterative learning controller. Finally, the simulation results are presented to demonstrate the effectiveness of the proposed schemes.

Robust design of feedback feed-forward iterative learning control based on 2D system theory for linear uncertain systems

Full automatic fluorescent powder coating process and device

The invention provides a fluorescent powder coating surface defect detecting system and a detecting method based on machine vision The system comprises a laser emitter, an image collecting terminal, an image sensor servo motor adjusting module, and an upper position personal computer (PC) The image collecting terminal comprises an image sensor, a vision processing and controlling module, and an interface module, wherein the image sensor, the vision processing and controlling module, and the interface module are connected in succession, the upper position PC is connected with the vision processing and controlling module through the interface module, the image sensor servo motor adjusting module is respectively connected with the vision processing and controlling module and the image sensor, and the laser emitter is connected with the vision handling and controlling module A laser triangulation method is adopted to detect the defects that a fluorescent powder coating is too thick and too thin, and thickness is not even The system collects fluorescent powder coating images which are coated to be compared with a standard image template, and therefore the defects that the fluorescent powder coating is irregular, stuck with glue and foreign matters and the like are detected The system is simple in structure, low in cost, high in detection speed, and high in detection precision

Fluorescent powder coating surface defect detecting system and method based on machine vision

This work set up the kinematics and dynamics modeling of three-link mobile manipulator by using Lagrange dynamics equation and nonholonomic dynamics Routh equation, and the method of artificial potential field was used to drive the mobile manipulator to finish the motion planning. The results of simulation illustrated correctness of the modeling and effectiveness of the method.

Modeling and motion planning of a three-link wheeled mobile manipulator

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