The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A scheme for globally stabilized controller design was proposed based on stability criterion of density function and solved via SOS (sum of squares) decomposition tool. In order to deduce the complexity of the controller, it was designed with minimum monomial terms which approximated by minimizing the norm 1 coefficients of controller monomials. Guaranteed convergence rate performance was considered...
A novel feedback control scheme for speed regulation of permanent magnet synchronous motor (PMSM) is presented based on energy-shaping and port-controlled Hamiltonian (PCH) systems theory. The desired state error port-controlled Hamiltonian structure is assigned to the closed-loop PMSM system by feedback control. Using interconnection and damping assignment passivity-based control (IDA-PBC) methodology,...
The hydraulic control system of the diamond wire saw which consists of two types of valves has been established considering the underwater work circumstances. The frogmen can control the start-stop or reversing of diamond string bead wires by using the manual reversing valve and adjust its rotate velocity of radial feed motor by using the governor valve conveniently. It belongs to an open-loop control...
Friction and load disturbance are important factors in high resolution control for 3-axis turntable servo system. LuGre dynamic friction model is adopted to describe the mathematic model of the pitch axis servo system with friction. Due to the dynamic LuGre model is built on three unknown parameters. Besides, system torque and inertia are also uncertain due to the motor torque ripple or disturbance...
In this parer, a sliding mode control algorithm based on Takagi-Sugeno (T-S) fuzzy model for a class of nonlinear systems is proposed. The nonlinear system is approximately represent by a T-S fuzzy model with mismatched parameter uncertainties and time-varying delay. An asymptotically stable sliding surface is designed by means of linear matrix inequality (LMI). The sliding surface can compensate...
This paper introduces a simple technique for designing a static Hinfin loop shaping controller. Sufficient conditions are established in Linear matrix inequality (LMI) form for the existence. The order of controller is equal to sum of the orders of the weighing functions. The genetic algorithms (GA) which guarantee the stability, performance in terms of Hinfin specifications, are adopted to optimize...
This paper studies the passivity problem for a class of uncertain stochastic recurrent neural networks (SRNNs) with interval time-varying delay. Based on Lyapunov-Krasovskii functional and stochastic analysis approach, a delay-dependent robust passivity criteria is obtained in the linear matrix inequality (LMI) format. The effectiveness of the proposed method is demonstrated by a numerical example.
In this paper, the optimal control problem to achieve lunar module soft landing with least fuel consumption is considered. The precise three dimensional dynamics is employed to describe the motion of the lunar module. By introducing two new state equations, a closed loop optimal control law is designed with a parameter matrix K to be determined which is the solution of a riccati like differential...
Because of the strong non-linearity and uncertainty, the dynamics restraints of autopilots, as well as the effect of wave disturbances, designing a high performance ship course controller is always a difficult work. This paper presents a design of the ship course auto disturbance rejection controller (ADRC) based on the nonlinear mathematical model of ship course locomotion with autopilot restrictions...
The body of a motion controller comprises of command parser, trajectory planner, position loop and real time interpolator, pulse generator, and pulse distributor. This paper illustrated design method of a general motion controller using digital interface style. MCU make complex motion plans, the programmable digital hardware generates high frequency pulse trains. An extended DDA circuit is used to...
Flexible job shop scheduling problem is a very important research in the field of combinatorial optimization. An improved ant colony algorithm for multi-objective flexible job shop scheduling problem is presented in this paper. The rule of our algorithm is described from the following aspects: local update, global update, trail intensities, solution set, local search, suitable parameters. The algorithm...
The problem of delay-dependent robust stability analysis and stabilization for uncertain singular systems with time delay are concerned in this paper. The parameter uncertainty is assumed to be norm-bounded and possibly time-varying, while the time delay considered here is assumed to be constant but unknown. By decomposing the singular time-delay system into slow and fast subsystems and using a new...
By searching the condition that guarantees the given performance index based on S-procedure technique, an Hinfin static output feedback control method is proposed for constrained system. Moreover, the dissipative constrained conditions and the elliptical set that contains output trajectory are cast as LMIs, and introduced into the optimization problem, then a moving horizon Hinfin control using static...
This paper discusses the problems of synchronization and pinning control for a kind of general time-delay complex dynamical networks. We obtain less conservative criterions for this kind of complex dynamical networks with time-delay. Pinning control strategies are respectively designed to make these complex dynamical networks synchronized. Furthermore, the problems of designing controllers are converted...
This paper is concerned with the finite-time control problem of continuous-time linear system that posses randomly jumping parameters which can be described by finite-state Markov processes. The main results provided are sufficient conditions for mean square finite-time stability (MSFTS) and mean square finite-time boundedness (MSFTB) via state feedback. Such sufficient conditions can be turned into...
Influenced by the factors such as deadzone, hysteresis loop, coulomb friction and working conditions during working, the hydrostatic transmission system with secondary regulation is nonlinear typically. So speaking strictly, there is no a control method which is suitable for the whole process of the controlled object, it is difficult to obtain famous control effect by use of conventional control method,...
This paper introduced scheduling algorithm of great tolerance wireless communication delay (GTD). This algorithm resolves real-time problem of cycle communication task in WNCS, and eases overtime phenomenon of cycle communication task caused by wireless network delay partly. Meanwhile, we proposed the nonlinear programming model for solving scheduling timetable based on the scheduling algorithms....
To the permanent magnet linear synchronous motor(PMLSM) for vertical hoist system, discontinuous primary PMLSM was adopted. In order to achieve anticipated performances and improved system dynamics, a novel compound control scheme for linear elevator driving by PMLSM with reference model sliding mode control is presented, which integrates advantages of sliding mode control and reference model control...
The problem of robust control for time-delay system with nonlinear uncertainty is considered, a state observer is exploited to reconstruct the state of system, then controller is designed by using a new theory of exponential stability and a new analysis method. The result is dependent on the upper of time delay. A example is finally presented to illustrate the efficient of the result.
Magnetic suspension system is a typical non-linear hysteretic system. A kind of technology, which combines the permanent magnet and the electromagnetism, is presented for its characteristics and can obviously reduce power consumption. In order to solve the impact of the change of current in magnet coils on the overall rigidity, a double closed loop control system, which introduces the current loop...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.