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Firstly the necessity of the design of signal coordination control system in urban main roads is presented , and the design thinking and process of the signal coordination control system is given, then according to the design thinking and process create a model of signal coordination control system in urban main road., and Qingyang Road of LAN Zhou City is taken for example, based on the survey data...
This paper addresses the H∞ control problem for linear systems where sensors, controllers and plants are connected by a network medium. A novel control scheme is proposed to stabilize an unstable plant by employing a time-varying sampling period method. Furthermore, the method may also compensate packet dropout and network-induced delays. The simulation results illustrate the effectiveness of the...
The vehicle control system based on Network communication becomes increasingly complicated recently. The traditional research only focuses on the improvement of network communication quality or system control performance. The network configuration had been carried out to study the vehicle chassis integrated control system. Based on the MATLAB/Simulink and TrueTime Toolbox, the distributed CAN network...
Active Queue Management (AQM) plays a very important role in congestion control of Transmission Control Protocol/Internet Protocol (TCP/IP) networks. This paper attempts to design an improved proportional-integral-proportional-derivative (PI-PD) controller as an active queue manager for TCP routers. The proposed controller scheme controls present congestion reactively and also avoids the incipient...
H∞ control problem of networked control systems with clock-driven sensor, actuator and event-driven actuator is studied. The sufficient condition of the existence of H∞ control law state feedback is derived through Lyapunov theory and linear matrix inequality. Design method is also presented. A simulation example shows the proposed approach is valid.
This note studies the problem of stabilizing networked control systems (NCSs) over random time-delay channels. In order to reduce the negative influences of communication constraints including signal transmission delay, data packet dropout and quantization effect, a new method on the H∞ controller design is presented. The proof techniques rely on Lyapunov function and linear matrix inequality (LMI)...
This note presents the problem of stabilizing networked control systems over noisy communication channels, where there exist more dropout packet in transmission. A novel controller design method, which relies on Lyapunov theory, is proposed to stabilize an unstable plant. By the method, it is possible to reduce the effects of packet dropout and network-induced delays on stabilization of linear time-invariant...
The problem of H∞ control design for vibration reduction of a base isolated structure with limited wireless communication capacity is studied in this paper. The network under consideration is subjected to measurement quantization, signal transmission delay, and data packet dropout, which appear typically in a network environment. Based on Lyapunov-Krasovskii functional (LKF) theory, some delay-range-dependent...
This paper deals with a convex optimization approach to the problem of robust network-based H∞ control for linear systems connected over a common digital communication network with norm-bounded parameter uncertainties. Firstly, we investigate the effect of both the output quantization levels and the network conditions under static quantizers. Secondly, by introducing a descriptor technique, using...
The paper presents the fault isolation method for linear systems taking into account the residual dynamics. The method is based on the analysis of the sequence of observed symptoms assuming the residual models. Additionally, the method of designing the secondary residuals that allows to achieve particular symptom sequence for particular fault is proposed. Described methods are illustrated with a simple...
This paper develops a ANFIS controller design method for temperature control in plastic extrusion system. The plastic extrusion process control system uses first order transfer function. Plastic extrusion system is generally nonlinear and the temperature of the plastic extrusion system may vary over a wide range subjected to various disturbances. The plastic extrusion system compresses of couple effects,...
This paper deals with the problem of stochastic robust asymptotically stability for a class of uncertain stochastic nonlinear time-varying systems with time-delays. The parametric uncertainties are assumed to be time-varying and norm bounded. The time-delay factors are unknown and time-varying with known bounds. The aim of this paper is to design a memory less state feedback control law such that...
In this paper, a design methodology and implementation architecture for diagnosers in the framework of hybrid systems is proposed. The design methodology is based on the hybrid automata model that represents the system behaviour by means of the interaction of continuous dynamics and discrete events. The architecture is composed by means of modules which realize the mode recognition and diagnostic...
In this paper, a new decentralized variable structure control scheme is proposed for a class of large-scale time-delayed systems with mismatched uncertainties. To overcome the defect that neither time-delay interconnection terms nor uncertainties satisfy the conventional matching conditions, the coefficient matrix of the switching function can be designed to satisfy a new matching condition, meanwhile,...
Using the Precision Time Protocol (PTP) specified by the IEEE 1588 standard, synchronization of distributed clocks is achieved by propagating the timing information of a preselected master clock throughout the entire network. Based on this directly or indirectly obtained noisy timing information, each slave clock tries to follow as closely as possible the master time. This paper formulates the PTP...
For a high power demand and N+1 redundancy system, this paper presents a digital load share (LS) controller design and its implementation for paralleled phase-shifted full-bridge converters (PSFBC) used in distributed power systems. By adopting the digital control strategy, separately used ICs for both PSFBC and LS control functions in the analog system can be merged into a cost-effective digital...
Feedback delays are inherent attributes of distributed control systems that usually cause unfavorable effect on the stability of the controlled process. Modelling of such systems is essential for traceable controller synthesis. In this paper we apply the TP Model Transformation to derive a polytopic representation of an LPV model where the time-delay is considered as parameter. The method is introduced...
A new loop filter design for third-order charge-pump phase locked loops is presented. The design is based on a discrete-time model with loop delay. In addition to the closed-loop stability, this method deals with the practical considerations: ripple swing, reference spur, and stability margin. Some of which are derived in terms of linear matrix inequalities (LMIs). Trade-off among the conflicting...
This paper deals with a hierarchical architecture of the Engine Control Unit (ECU) made-up of two levels: the higher one, called powertrain level, computes the current and the future torque demands; The lower level, called engine level, uses these information to provide an appropriate motor control. In continuous-time framework, a H2-control design with preview is proposed for the lower level and...
This paper is concerned with stability and stabilization of fuzzy bilinear systems with time-varying delay. First, we consider the stability of the closed-loop systems by assuming a special form of a fuzzy controller. Both delay-independent and delay-dependent stability conditions are obtained. These stability conditions are given in terms of linear matrix inequality (LMIs). Based on these stability...
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