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The performance optimization of many man-made systems belong to simulation-based constrained optimization (SBCO), where the evaluation of both the performance and the constraint have no closed form expression and are based on simulation. The simulation-based estimate of both the performance and the feasibility are usually time-consuming and noisy. So it is of great practical interest to study how...
Hula-hoop is not only one of familiar toys but also interesting system as a nonlinear control system. While humans play hula-hoop, hoop does not slide on the body but rotates around it. Though it is controlled only by the motion of the body, humans can realize enduring rotary motion without dropping hoop. The purpose of this paper is modeling and control of hula-hoop system as a nonlinear control...
The software requirements decomposition can be taken as a dynamic system. According to the nonlinear dynamic requirements decomposition equations developed by us based on the nonlinear dynamic system. This paper further researched the chaotic phenomena of software requirements through simulations. The occurrence of chaos in the process of software requirements decomposition is determined by Requirements...
We propose an underactuated mechanical system named inverted pendulum on a cart beam system. The proposed system has three degrees-of-freedom and one control input. The mathematical model is derived using Lagrangian method and the stabilization is achieved with constraints using a linear controller designed based on linear matrix inequality approach. Simulation results are presented to validate the...
In order to solve the slightly complicated structure and the big calculation of integral variable universe adaptive fuzzy controller, as well as the difficulty to choose the contraction-expansion factor, a weighted sum-type variable universe adaptive fuzzy controller is designed. At the same time the general method on how to choose contraction-expansion factor is given. First, based on weighted sum...
This paper focuses on a critical component of the situational awareness (SA), the neural control of depth flight of an autonomous underwater vehicle (AUV). Constant depth flight is a challenging but important task for AUVs to achieve high level of autonomy under adverse conditions. The fundamental requirement for constant depth flight is the knowledge of the depth, and a properly designed controller...
The best launch method can be given by arranging the launch time and jamming rocket sort for the emplacements because the relative position, range and jamming rocket number of the emplacements are different in the launcher. A reinforce launch algorithm is proposed based on the characters of the firepower intersection and tracking.
The interpolative control structures, in fuzzy or other variants, don't achieve very good performances when the controlled plant contains dead times. In an interpolative adaptive controller is presented, named PSAIC, which for certain types of plants offers good performances regarding variations of the plant's parameters, and particulary for some small variations of the dead time. This paper enhances...
This paper presents a comparative study between several mobility models. Simulation environment is a time variant real representation of a city based on GIS, integrating all geographical and socio-economical information relative to this city. Simulation results are the basis of the comparative analysis between the models. This comparison is made by setting metrics evaluating individual and population...
This paper deals with the stealth target-interception problem based on the active prediction planning execution (APPE) strategy. In order to cope with the evasive feature of the invader, we make the robot move stealthily by hiding behind obstacles. We adopt a roadmap-based decoupled approach, which plans the path and the trajectory separately by developing new concept; the detection map. Simulation...
The linear quadratic regulator for the underwater glider is designed, and the motion path of the feedback control system in ocean vertical plane is studied. First, changes of the trajectory path when the glider is in steady moving are tested in this paper. Then, according to the fact that the glider needs sharp turning, two kinds of control strategies are studied. From the contrastive analysis, we...
Presents two reaching laws of sliding mode for discrete-time variable structure control systems to solve the problem in designing the system control input. Considering the system control input is restricted, the reaching laws proposed in this paper adopt the approach angle and the distance to the sliding surface to regulate the system control input properly. By applying the proposed reaching laws...
This paper presents the problem of trajectory tracking control for the nonholonomic six-wheeled mobile robot. Based on backstepping control algorithm, a switch function for quasi-sliding mode control is designed and a quasi-sliding mode controller with global asymptotically stability is proposed for the kinematic model. This method simplifies the controller design and is applicable to the trajectory...
Along with the development of science and technology, ARM technique obtained new breakthrough, resulting in the more serious threat to the radar on modern battlefield. Various methods have been proposed and used to counter an ARM, including that improve the mobile ability of radar, employ the radar system with dual (multiple) base, realize the time control of radar transmission signal, realize the...
This paper introduces the problem of iterative learning control (ILC) for perspective dynamic systems (PDS), referred to as ILC-PDS, where the task is to track a 3-D desired trajectory from information observed on the image plane of an imaging system, such as a camera. Unlike many ILC implementations in motion control applications, which use feedback from encoders, we assume measurements from the...
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