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In this paper an extended state observer (ESO) based guidance law is proposed for hit-to-kill interceptors in the three-dimensional high-speed engagement. An approximate miss distance formula is given in this scenario. The nonlinear uncertainties and unknown target maneuvering are regarded as total disturbances of the kinematics, which are estimated by the ESO. With the estimation results as the compensation,...
In this paper, decentralized controllers are developed to drive a swarm of mobile agents with high-order (n > 2) nonlinear dynamics in strict feedback form into a moving target region while avoiding collisions among themselves. It is important to consider coordination of multiple high-order agent dynamics which generalize the existing simple single-integrator/double-integrator ones because, in...
A fuzzy controller for the dissolved oxygen (DO) concentration of a wastewater bioreactor is presented. The controller is developed and tested based on simulations using first order plus dead time models obtained from experiments with an actual wastewater bioreactor. The controller uses feedback of the error in DO concentration and rate of change of the DO concentration and manipulates the valve position...
Winding molding is a commonly-used molding method for composite fiber materials, in which the fiber winding tension is an important parameter, since the winding tension directly influences the quality of winded products, making winding tension control a key technique in fiber winding. A new type closed-loop tension control system, with PLC as the main controller, the industrial control computer as...
In this paper, nonlinear feedback control of a distributed process is considered by using robust right coprime factorization approach. The distributed process model is developed. The model includes a water level process model of single tank and a water flow process model for twin-tank. Then, robust right coprime factorization based nonlinear control is proposed for the distributed process consisting...
In this paper, fault detection for networked control system with data packet dropout between sensor and controller is discussed. A fault observer structure is presented, in which the previous system output transmitted successfully is used for feedback of the observer when data packet dropout happens. Suppose continuous data packet dropout is finite, the dynamics of the observer error can be modeled...
High-precision operation in gantry systems is required to meet higher demands on synchronization positioning accuracy. In this paper, a synchronous control scheme for gantry moving type milling machining centers using dual linear servomotors is presented. To guarantee the requirement for high accuracy in synchronous tracking, the same position feedback controller is used to single linear motor position...
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,...
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...
The components and work principle of Separate Meter In and Separate Meter Out(SMISMO) load sensing control system are introduced. In the novel system, the traditional proportional valve is replaced by the separate meter in and separate meter out valve element which is used to control velocity of piston in the asymmetric cylinder. Nonlinear simulation model of the novel system is built to study the...
A symbolic-based motion control method for wheeled mobile robots is put forward in this paper. Wheeled mobile robots, which are characterized by the nonholonomic constraints, are particularly difficult to control since real environment may be full of obstacles. Traditional methods have to resort to analysis and design at the level of individual sensors and actuators. As a result, the richness of the...
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