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In this paper, a kind of reference trajectory of line-of-sight (LOS) angle based on the optimal control theory is given. Then, the corresponding nonlinear generalized predictive control law is designed to make the missile's actual LOS angle track the reference LOS angle. Simulation results show that the proposed nonlinear generalized predictive control law can make the missile hit the ground stationary...
This paper investigates the problems of robust D-stability and D-stabilization for linear discrete uncertain descriptor systems ties in the whole system matrices cover that in the coefficient matrix E. We assume that the coefficient matrix E is rank-invariant, that is, rank(E) = r ≤ n for all admissible uncertainties. Thus, we consider the robustness analysis problem as two cases: the right-descriptor...
A fuzzy-PID speed controller proposed in this paper is designed for the Doubly Salient Motor (DSM) with axial flux, which has high efficiency of rotor and power density. This paper started from the structure and mathematical model of axial flux DSM, and then analyzed its operating characteristics. Due to nonlinear functions of Flux and torque rotor position and phase current, application of linear...
In this paper, we study continuous but non-smooth adaptive observer of a class of nonlinear systems. Compared with the traditional adaptive observers, there is an additional homogeneous nonlinear part. The additional part can not only accelerate the convergent speed of the estimation errors of the states and the unknown parameters, but also improve robust against additional noises. The main results...
Strict requirements for joint motor controllers have been put forward with the development of robots. In particular, when a humanoid walks quickly or runs, instantaneous high power and large current are desired. Traditional motor controllers protect themselves by setting maximum operating current. This method is simple and effective, but it does not give full play to the maximum output power of the...
This paper addresses the feedback control design problem for a wide class of discrete-time systems possessing fast and slow modes. The slow and fast subsystems are considered to be completely controllable and observable. Based on the H∞ optimization criteria, a two-stage design procedure is developed using separate gain matrices for the fast and slow subsystems and computed using linear matrix inequalities...
Quasi-synchronization is an important type of synchronization because of the parameter mismatches in the real world, so we will investigate it for a delayed network, which is master-slave coupled. By applying the aperiodically and nonlinearly intermittent control on the network, and assuming the time delay is varying, we will present some useful criteria for exponential quasi-synchronization. The...
This paper presents and investigates two new numerical algorithms (i.e., E47 algorithm and 94LVI algorithm) for solving the quadratic programming (QP) problem subject to inequality and bound constraints. Such a constrained QP problem is firstly converted equivalently into a linear variational inequality (LVI), and then converted equivalently into a piecewise-linear projection equation (PLPE). The...
A new acceleration-level performance index is proposed and studied for robotic redundancy resolution, which achieves purpose of the minimum kinetic energy (MKE) redundancy resolution originally designed at the joint-velocity level in this paper. Theoretical analysis is then given to show the relationship about the original MKE scheme at velocity level and its equivalent redundancy-resolution scheme...
Fossil fuel depletion risk forecasting and growing environmental concerns are strong impetus for developing higher efficient transportation system nowadays. Hybridization is considered as one of the most efficient short and mid-term solutions. In particular, series hydraulic hybrid configuration provides a further advantage when it provides more degree of freedom of engine control. However, low energy...
In modern fly-by-wire control system, pilot induced oscillations (PIOs) have long been an aviation safety problem. The violation of actuator rate saturation is known to be a leading cause of PIO and has long been linked with performance and stability degradation of an aircraft. This paper proposes a phase compensator designed to reduce the adverse effects of rate saturation of the control surfaces...
Since the search theory was put forward in the period of WWII, the search problem has become a research hotspot. As the search tasks are getting more varied, cooperative search is becoming a trend. By analysis on the “Two-way Search” problem in multiple UAVs cooperative search operations, the searchers and the targets were considered to form a game. As the searchers allocate their members to detect...
In this paper, the asymptotic tracking and disturbance rejection algorithm is revisited. It is applied in voltage source converter controller design to realize steady-state error when the reference is a sinusoidal signal. Detailed design procedures are also developed and described. Circuit level simulations are carried out, and results show the effectiveness of reference tracking and disturbance rejection...
A new energy efficient routing algorithm for wireless sensor networks is proposed. The new routing algorithm (Resistance Distance Routing algorithm, RDR algorithm) optimizes the routing path based on the theory of resistance distance in electricity. This paper describes the whole process of RDR algorithm in detail, and simulates it with MATLAB. Simulation results show that RDR algorithm is superior...
The SITAN algorithm makes use of terrain elevation information to aid inertial navigation system and achieves good results. The geomagnetic field can be used as the conditions of the auxiliary inertial navigation, because the geomagnetic value map and the terrain elevation map have high similarity. By using the SITAN algorithm and combining the contour information of existed geomagnetic map with the...
The stability of temperature in the chamber of excimer laser has a great effect on working performance of the excimer especially for the energy stability and useful life. So it is very important to keep the chamber temperature constantly. Based on that, a high precision temperature control system of excimer laser and two improved PID control algorithms were designed. Experimental results indicate...
The CSNS (China Spallation Neutron Source) RCS (rapid cycling proton synchrotron) RF (Radio Frequency) remote control system is a DCS (distributed control system) system based on the EPICS (Experimental Physics and Industrial Control System). This system is used to remotely control and monitor the accelerating cavities and their accessory equipments of the rapid cycling proton synchrotron (RCS) for...
According to the characteristics of two software Labview and Matlab, this paper presents a co-simulation method of Labview and Matlab. This method will combine the advantages of both software by mixing programming and co-simulation. Through the example of Direct Torque Control (DTC) fuzzy controlling, this paper introduces the design of the fuzzy controller in the Labview, and describes a method to...
The control systems typically use the conventional PID (Proportional, Integral, Derivative) controller to control the direct current (DC) voltage [1]. The obtained control results are relatively well when PID controller is applied, but the design parameters are not absolutely precise and sensitive to the changes of system parameters. The PID controller is used to control the frequency of three-phase...
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