The structured singular value, μ, can be used to analyse the robust performance characteristics of control systems with respect to the potential perturbations in plant dynamics, μ can also be used in control system ...
The structured singular value, μ, can be used to analyse the robust performance characteristics of control systems with respect to the potential perturbations in plant dynamics, μ can also be used in control system design. Whilst it is not currently possible to synthesise a truly μ-optimal controller, a process known as DK-iteration is available employing H ∞ design techniques. A preliminary study is described that uses a multiobjective genetic algorithm to tune the weighting functions of a controller derived using DK-iteration.
In this paper a switching force/position control system of robot manipulator by using fuzzy logic is proposed. This system contains a fuzzy control system. The first aim of this paper is achievement of a good end-effe...
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In this paper a switching force/position control system of robot manipulator by using fuzzy logic is proposed. This system contains a fuzzy control system. The first aim of this paper is achievement of a good end-effector trajectory tracking performance when the manipulator moves in free space. The second is considering the system behavior when contact forces arise. The objective is to control the contact force and enable the robot actively accommodate the reactive force of environment instead of rejecting it. Performance of the force control schemes for different values of compliant environment are considered and analyzed.
The paper addresses the problem of robust output feedback controller design with a guaranteed cost and parameter dependent Lyapunov function quadratic stability for linear continuous time polytopic systems. The propos...
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The paper addresses the problem of robust output feedback controller design with a guaranteed cost and parameter dependent Lyapunov function quadratic stability for linear continuous time polytopic systems. The proposed design methods lead to a non-iterative LMI based algorithm. Numerical example is given to illustrate the design procedure.
This paper investigates the development of feedforward control strategies for vibration control of pitch movement of a twin rotor multi-input multi-output system (TRMS) using command shaping techniques. The TRMS is a ...
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Based on Bayes theory of hypothesis testing, a new DWTdomain decoder structure for image watermarking has been proposed in this work. The statistical distribution of wavelet coefficients is deliberately described with...
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Software testing is a very important phase for software project process. It is a very difficult job for a software manager to allocate optimally the financial budget to a software project during testing. This article ...
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Software testing is a very important phase for software project process. It is a very difficult job for a software manager to allocate optimally the financial budget to a software project during testing. This article considers the problem of optimal allocation of the software testing cost. There exist several models focused on the development of software costs measuring the number of software errors remaining in the software during testing. The purpose of this paper is to use these models to formulate the optimization problems of resource allocation: Minimization of the total number of software errors remaining in the system;On the condition of assuming that a software project consists of some independent modules, the presented approach extends previous works by defining new goal functions and extending the primary assumption and precondition.
An innovative watermarking scheme based on progressive transmission with genetic algorithms (GA) is proposed. We implement the watermarking embedding and extraction system in the discrete cosine transform (DCT) domain...
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An innovative watermarking scheme based on progressive transmission with genetic algorithms (GA) is proposed. We implement the watermarking embedding and extraction system in the discrete cosine transform (DCT) domain, and apply the JPEG spectral selection mode for progressive transmission. By employing GA with a proper fitness function into the watermarking system, both the watermark imperceptibility and watermark robustness requirements are considered and optimized. In addition, the embedded watermark can be partly extracted in the receiver side even when the watermarked image is being transmitted. Simulation results show both the robustness and the effectiveness of progressive transmission under different attacking schemes and different bandwidth variations.
In this paper, problems related to the design of fault detection filters (FDF) for dynamic systems with unknown inputs are studied. Core of our study is to consider the design problems under two different residual eva...
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Multi-process job schedule is a very difficult problem often faced by project managers. This study initially considers the problem of small-scale multi-process job schedule by using Stochastic Petri Nets (SPNs) techni...
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Multi-process job schedule is a very difficult problem often faced by project managers. This study initially considers the problem of small-scale multi-process job schedule by using Stochastic Petri Nets (SPNs) technique. The SPNs model of multi-process job schedule is come up with in the paper, and then the basic steps of search algorithm for job schedule are put forward successively. On the bases of these works, the multi-process job schedule algorithm is given, and the schedule strategies are discussed at same time. For getting the optimal solution of the small-scale multi-process job schedule, the algorithm based on the random search strategy is proposed and the analysis of result believing rate is also discussed. The example of how using the search algorithm to plan the job based on SPNs is given at the last of paper.
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