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This paper considers vehicle speed dependent assistant control problems for electric power steering systems (EPSs). According to the requirement analysis of the vehicle speed dependent assistant control, a mathematical model of EPSs is established, and a double closed-loop control system structure is proposed. Based on the assist characteristic of the desired steering wheel torque, the function model...
In order to realize the differential function of electric vehicle driven by two rear wheel-hub motors, by following the optimal slip ratio of each wheel and equalizing the slip ratio of both drive wheels as target, a electronic differential control strategy based on terminal sliding mode is proposed. First of all, according to the standard μ-λ curve, the optimal slip ratio of the pavement is determined...
The emulation of synchronous machines is an attractive solution to improve the integration of distributed energy resources in weak grids. In this sense, synchronverters have been widely analysed in the literature, but their digital implementation has been seldom studied. This paper presents the discrete-time implementation of the control algorithms for a battery-supported synchronverter in a weak...
To the optical mechanical complexes of tracking and positioning, strict requirements are produced on the dynamics and permissible errors under such conditions as external and internal nonstationary disturbances, as well as presence of elastic deformations in the links of the driven mechanism. In modern systems, adaptive control algorithms have proven themselves as complementary to the main control...
Welding is an important operation in manufacturing processes and it can represent a highly relevant amount of production costs, depending on material workpieces and required weld quantity. In mechanised and robotised welding processes, robot's travel velocity is an important parameter, which requires a proper regulation to obtain a good quality for weld beam. Then, in this work, a nonlinear model...
This paper describes the reduction of chattering in functional electrical stimulation (FES) with Smith compensator. We proposed a bilateral controller using FES. In the bilateral controller, in addition to normal remote control, the reaction forces of the distant location are transmitted back to the operator. Therefore, the operator feels like being in the distant location. In controlling of the human...
Testing of electric vehicle drives in real traffic conditions is relatively expensive and complicated task. Therefore new laboratory methods, enabling testing and special parameters of electric drives measurement "like in real traffic" are in the looking for. One of most effective methods is based on HIL (Hardware In the Loop) which represents combination of simulation methods and measurements...
This paper proposes to optimize wind energy extraction through a hybrid PID-Fuzzy pitch control strategy for wind turbines. The modeling of a 20 kW wind turbine will be reviewed, in which three strategies of pitch control, PID, Fuzzy and Hybrid PID-Fuzzy, will be implemented, comparing the results of the different control strategies.
In this paper, a sensorless admittance control scheme is developed for robot manipulators in the presence of input saturation by employing neural networks. To deal with system uncertainties, the radial basis function neural network (RBFNN) is integrated into control design. In order to deal with input saturation, a compensator is applied to handle this problem. To interact with the environment, admittance...
There is the high surge current emerging when the asynchronous traction motor is replaced by PMSM with power down-rejoining on. The high back EMF voltage exists when traction PMSM is passing the switching phase insulator. The reason is due to the constant value existence of the permanent magnet. Aiming at above mentioned problems, this paper analyses the reasons of causing transient surge current...
The paper presents a complete solution for speed sensorless control system for five-phase induction motor with voltage inverter, LC filter and nonlinear control of combined fundamental and third harmonic flux distribution. The control principle, also known as multiscalar control, nonlinear control or natural variables control, is based on a use of properly selected scalar variables in control feedback...
The output torque of switched reluctance motor (SRM) can be controlled by flowing an appropriate current through the armature windings. In general, current hysteresis control has been applied. However, there is a problem that acoustic noise generated from the SRM at the driving tends to become large. Then, there are reports that PWM control has been applied to suppress the acoustic noise. This paper...
The paper describes the voltage control technique of squire-cage induction machines supplied by a current source inverter. The control system is based on new transformation of the electric drive system (machine and inverter) state variables to the multi-scalar variables form. The backstepping approach is used to obtain the feedback control law. The control system contains the structure of the observer...
The paper presents the controller design of a inertial stabilization platform for optical devices in which a one axis gimbal system is used. The proposed approach is based on a Fractional Order Proportional Integral Derivative (FOPID) controller, whose parameters are designed by using genetic algorithms optimization. The controller performance has been compared with those of a standard PID controller.
The greatest progress is observed in variable speed AC electric drives. The article presents principles and approaches to the synthesis of structures and parameters of corrective connections of AC electric drives with field regulated reluctance machine. It is shown that the quality of the control parameters depends on the conditions for setting the internal regulation loop of the electromagnetic torque...
In this paper, control system and simulation of an arc-linear permanent-magnet synchronous machine with normal armature windings and compensation windings are researched. Considering the special structure of the machine, the mathematical model of the machine is investigated and established. The control scheme and the control system for the machine are also researched to reduce the torque ripple for...
This paper considers the design of a controller and a constraint-enforcement scheme for application to dualmode, autonomous and manual steering systems. A tracking controller is designed to track a desired pinion angle during autonomous operation, and to provide assistive torque during manual operation. The tracking controller is designed using H∞ synthesis with tracking made possible via the solution...
The dynamic road load simulator (DRLS), which is used to simulate the load torque of vehicle drivetrains, is an important equipment to test the reliability of vehicle drivetrains. In order to ensure its performance, this paper designs the control system for DRLS. The permanent magnet synchronous motor (PMSM) is used as the loading motor, and the control system applies the current, speed and load torque...
Modular Cascade Machines (MCM) is a system where integrating several modular designed machines to replace the conventional single machine, and gradually attracted worldwide attentions in recent years. It may have perspectives in the applications of Electrical Vehicles (EVs). This paper developed a possible MCM torque distribution strategy, by the means of Adaptive Network based Fuzzy Interface System...
This paper mainly focuses on the characteristics of limit cycle oscillation due to backlash nonlinearity and its suppression method in a two-mass drive system. The full-closed loop control system is proposed to improve positioning accuracy. However, the performance is poor due to the transmission backlash. Therefore it is of great significance to analyze the characteristics of limit cycle. In the...
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