Improving of Electromechanical Stabilization Systems Accuracy

Abstract

Aim. Improving of accuracy parameters and reducing of sensitivity to changes of plant parameters for nonlinear robust tank main armament guidance and stabilization electromechanical systems based on synchronous motor with permanent magnets and vector control. Methodology. The method of multiobjective synthesis of nonlinear robust control by nonlinear tank main armament stabilization electromechanical system taking into account the elastic oscillations of the tank gun barrel as a discretecontinuous plant and with parametric uncertainty based on the multiobjective optimization. The target vector of robust control choice by solving the corresponding multicriterion nonlinear programming problem in which the calculation of the vectors of the objective function and constraints is algorithmic and associated with synthesis of nonlinear robust controllers and modeling of the synthesized system for various modes of operation of the system, with different input signals and for various values of the plant parameters. Synthesis of nonlinear robust controllers and non-linear robust observers reduces to solving the system of Hamilton-Jacobi-Isaacs equations. Results. The results of the synthesis of a nonlinear robust tank main armament guidance and stabilization electromechanical systems are presented. Comparison of the dynamic characteristics of the synthesized tank main armament stabilization electromechanical systems showed that the use of synthesized nonlinear robust controllers allowed to improve the accuracy parameters and reduce the sensitivity of the system to changes of plant parameters in comparison with the existing system. Originality. For the first time carried out the multiobjective synthesis of nonlinear robust tank main armament stabilization electromechanical systems. Practical value. Practical recommendations are given on reasonable choice of the gain matrix for the nonlinear feedbacks of the regulator and the nonlinear observer of the tank main armament stabilization electromechanical systems, which allows improving the dynamic characteristics and reducing the sensitivity of the system to plant parameters changing in comparison with the existing system. References 24, figures 1.

Electromechanical guidance system based on a fuzzy proportional-plus-differential position controller

“…It is known that positional electric drives are able to implement the desired laws and trajectories of the actuators as well as the quality of static accuracy and speed of positioning. Therefore, the task of obtaining the highest control speed in the absence of overregulation and traction modes at «creeping» speeds and the required static positioning accuracy can be considered relevant and important in the modernization and optimization of electromechanical guidance systems in azimuth and pitch of the BM-21 combat vehicle [3,4].…”

“…The classic approach in the construction of positional automatic control systems (ACS) is the use of proportional (P) position controller (PC) [3][4][5][6][7]. This structure of the ACS makes it possible to obtain the desired indicators of the dynamics of positioning in the modes of large displacements in the implementation of the trapezoidal tachogram of the electric drive movement.…”

“…8). At the output of the Switch, the current value of the normalizing factor k n is formed which is fed to the input of the multiplication element Prod at the output of which the speed reference signal U c. is formed according to (4).…”

Analysis and Verification of the Operation of the Stabilizing Robust Controller's Electrical Circuit of the Rotor Flux-Linkage Control System

“…However, such an analysis cannot be carried out without determining the analytical relationships between the coefficients of the transfer function of the controller and the parameters of the resistors and capacitors of the circuit, which vary randomly within the specified boundaries. Due to the linearity of the mathematical model of the robust fluxlinkage control system [4], such formulas cannot be obtained exactly [6,7]. Therefore, it is necessary to quickly check the operation of the circuit.…”