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Permanent-magnet synchronous-motor is a multi-variable, non-linear, strong coupling system that is highly sensitive to the outer interfere and inter perturbation. To improve the system robustness, the adaptive back-stepping control of permanent magnet synchronous motor based on slide mode observer is put forward. Based on the mathematic model of permanent magnet synchronous motor and the theory of...
For the DC chassis dynamometer, a nonlinear mathematical model was established based on the analysis of the transmission system of the DC dynamometer, and an adaptive controller based on RBF NN (radial basis function neural network) was proposed to control a dynamometer to load resistance intelligently to achieve stepless simulation of inertia. By using the Lyapunov synthesis approach, it was proved...
In this paper two methods of speed estimation of a three phase induction motor system are analyzed. The method of direct torque control with no sensors was used to control the motor system. The mathematical models of the above mentioned methods are analyzed for every case. Following the estimation method analysis of open and closed loop the observation method of closed loop is expanded with the use...
The electronic throttle control (ETC) is a key component in modern automotive, which affects the performance of traction control and engine torque control. An ETC control system consists of a DC servo motor driving a circular-shaped valve plate, which is connected to a preloaded spring. The opening angle of the valve plate controls the air flow into the engine. When the control system fails, the spring...
In this paper a novel framework for a multivariable control design task in the field of hybrid electric vehicles is introduced. The problem under consideration consists of a speed synchronization task of two propulsion aggregates using a controllable separation clutch. During this synchronization period the longitudinal vehicle motion of the vehicle should not be affected. The proposed control strategy...
This paper presents a concept for the nonlinear control design of a 4-axis manipulator arm driven by pneumatic muscle actuators. This arm, named AirArm, was developed within a research project of Festo's Bio Learning Network 2008. The control design is based on a cascade structure with four levels. The upper level generates the reference trajectories for the joints of the arm, in consideration of...
In this paper, we present a case study on spacecraft attitude control. The plant (spacecraft attitude model) is a second order, nonlinear, multi-input-multi-output system defined by Euler's equations of rotational motion and the kinematic differential equations. The modified Rodrigues parameter (MRP) is used for kinematic parametrization and is the only measurable variable at the plant output. It...
In this paper, we propose a control algorithm for trajectory tracking control with self balancing of unmanned bicycle by using nonlinear control based on the output-zeroing controller. The simplified model of the bicycle with the balancer is derived from Lagrangian and nonholonomic constraints with respect to translation and rotation relative to the ground plane. We derived a controller using a steering...
The basic principle of space vector pulse width modulation (SVPWM) and a method of building two closed-loops vector control simulation model for permanent magnet synchronous motor (PMSM) are presented in this paper. At the same time, a new non-linear PID controller in speed closed-loop is studied. Simulation results show that it has good dynamic and static performances with no overshoot and small...
In this paper, we describe the controller design method for nonlinear radar gimbal stabilization system with time-delay with polytopic uncertainty. In order to consider nonlinearity of the gimbal bearing frictional torque, we represent T-S fuzzy model for the nonlinear gimbal system. And the represented model can be rewritten as Parameterized Linear Matrix Inequalities (PLMIs), that is, LMIs whose...
In this paper, a variable structure controller based on sliding-mode design is proposed for induction motors that propel electric vehicle drives. The underlying design concept is to endow the closed loop system with high performance dynamics for all possible speed ranges while maximizing power efficiency and keeping the required stator currents within the inverter ceiling limits. The proposed approach...
Pressure ripple in electric power steering (EPS) system can be caused by the phase lag between driverpsilas steering torque and steer angle, the nonlinear frictions, and the disturbances from road and sensor noise especially during high frequency maneuvers. This paper novelly applied the robust fuzzy control method of active reduction of pressure ripple for EPS system, which achieves remarkable progress...
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