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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...
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...
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...
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...
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...
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...
In order to reduce the speed overshoot of the traditional PI speed controller in direct drive permanent magnet synchronous motor(DD-PMSM), a novel speed controller is presented in this paper. In addition, a reduced-order load torque observer is proposed to reduce the effect of load torque changes and other disturbance factors on the system performances. The observed torque is imported to the input...
This paper proposes a robust chattering-free sliding-mode (CFSM) control for an electronic throttle (ET) system in drive-by-wire vehicles. Although boundary layer method is used in traditional linear sliding-mode based-electronic throttle control systems to remove control chattering, both the tracking precision and control robustness are affected. The uniqueness of the proposed CFSM controller is...
Adaptive fuzzy PID controllers, combining fuzzy controllers which are highly adaptable with conventional PID controllers which have no control error, have been used in vector control systems of permanent synchronous machines(PMSM). In this paper, an adaptive fuzzy PID controller of which membership functions are dramatically improved is designed and applied to a PMSM. Then, simulation in Simulink...
In order to improve the safety and dynamic performance of electric vehicles, prevent the wheel from getting locked or slipped when braking or accelerating, and maximize the longitudinal force on low-friction coefficient roads, it is necessary to control slip ratio of each wheel in the stable region. Combining the theory of the nonlinear model predictive control (NMPC), this paper presented a slip...
A hardware-in-the-loop technique is developed to control a permanent magnet synchronous motor. The chosen motor is a commercial one and is used for positioning a solar tracker over the azimuth or the elevation directions. The control strategy was initially tested on a real time controller and adapted afterwards for the given electromechanical system. A Matlab/Simulink simulation is provided for the...
In ground-to-ground military engagements, launchers used in land vehicles play an important role for armies. In application, orienting missiles and rockets which are fired from the land vehicles and finally hitting the intended targets with high accuracy are issues that should be taken into consideration. In order to attain this goal, it is vital that an effective control algorithm be designed. As...
Disturbance rejection is an important technique in bilateral teleoperation that can ensure the stability of the system from unwanted inputs. One of the major disturbance for the system is the external vibration from both sides. This paper aims to apply the concept of one degree-of-freedom inertia-spring-damper system for vibration suppression in the bilateral control system. For vibration control,...
In the high-speed permanent magnet synchronous motor(HS-PMSM) driver system, the current sampling is not accurate enough to support the calculation of complicated algorithm (vector control, direct torque control, etc.) since the current varies significantly in a single pulse-width modulation (PWM) period because of the small parameter of the HS-PMSM due to the high speed design. In this article a...
Due to the superior dynamic performance of the field oriented control technique, Induction Motors (IM) are the workhorses of industries. Core Loss (CL) and Stray Load Loss (SLL) are generally neglected in developing of the mathematical model of IM. But they should be considered in the mathematical model of IM from a viewpoint of precise control of speed and torque. Though PI based control strategy...
The article presents the system of ergonomic angular distribution of torque on the pedals in the pedaling-by-wire driven electric vehicle. The work is an attempt to make cycling feelings close to the natural in the presented prototype — as in the typical bicycle. Ergonomic distribution of torque results also in speed fluctuations reducing. The model of pedaling process is shown with introduction of...
Modern electromechanical systems due to the respective electric drives control algorithms, have to ensure maximum achievable requirements for precision and control dynamics of the spatial coordinates of the bodies that make up their structure. The features of these systems are changing the dynamic parameters, which include, changing the moment of inertia of bodies relative to the axis of rotation,...
In optimizing PID controller's parameters using any optimization algorithm, fitness function is one of the important area to be explored. Among frequently used fitness function is a weighted transient response index (WTRI) where the weight is given to each of the transient response component including rise time, settling time, overshoot and steady state error based on their priority set in specification...
This paper aims to develop an innovative direct torque control (DTC) for an induction motor (IM) drive based on model prediction (MP). An effective methodology for the optimum selection of weighting factor is proposed, based on the evaluation of ripple behavior. A sensorless speed estimation technique utilizing the predictive nature of proposed MP DTC is adopted. Firstly, the paper introduces a detailed...
This paper presents a non-isolated power factor correction (PFC) Zeta converter fed vector controlled round rotor Permanent magnet synchronous motor (PMSM) drive operating under variable load and speed. The vector controlled drive uses a proportional-integral (PI) controller for production of maximum torque per ampere, while the PFC converter improves power quality (PQ) at AC mains in continuous inductor...
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