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Rotary impact screw driver is a tool that can be used during screw-fastening process. In applications where loads used are small, the high torque from impact driver may lead to overturn or cause the screw bit to be disengaged from the screw point. Manual screwing using switch trigger often is a challenge to the users. In this paper, the aim is to ease the screwing process and reduce the problem as...
Steady-state motor efficiency control has been shown to provide significant motor loss savings and efficiency improvement. Including adjustable speed drive inverter losses into the steady-state motor control optimization is also of interest. What is shown here is the effect that these two efficiency improvement schemes have on the distribution of losses between the motor and the inverter when an efficiency...
In this paper, we present our research efforts which investigates efficiency of mechanical energy transfer from flywheel to the overall mobile hovering robot body not only with simulations but also with real world experiments. To generate varying amounts of inertia with respect to rotation requirements, a counter rotating flywheel system is developed and multiple angular motion profiles are applied...
This paper presents the design and implementation of a current controlled Rotor Flux Oriented PMSM for automotive steer-by-wire applications. The development of a realistic torque feedback reference is carried out by monitoring the steering torque while driving a commercial vehicle. The paper shall discuss the torque dynamics of the PMSM drive with respect to position demands replicating a driver...
The marine industry is seeing an increasing number of vessels equipped with electric propulsion opposed to traditional mechanical propulsion. Electric propulsion has been shown to be advantageous in various land applications such as locomotives and road vehicles however in the marine setting the highly variable hydrodynamic load exposes the electric propulsion system to extreme load conditions. This...
The paper defines the main causes of impermissible dynamic loads in the shaft assemblies of a horizontal plate mill stand. It substantiates the development and commercialization of a stationary telemetry system for continuous control of the torque of the shaft assemblies at the 5,000 mm mill stand at Magnitogorsk Iron and Steel Works, OJSC. The authors determine the main system functions and list...
Different with the onshore power generation equipment, marine current turbine always operates in a poor natural environment that the arrangement of measured points is restricted. With a small amount of signal, single domain usually cannot detect the fault comprehensively. A multi-domain reference method is proposed in this paper for imbalance fault detection of variable-speed direct-drive marine current...
This paper deals with description of the use of electrically powered compressor for a turbocharged internal combustion engine. The main purpose for use of electrically powered compressor is an improvement of transient engine behavior and increase of the boost pressure at low engine speeds. The compressor is driven by high speed switched reluctance machine, while in this paper the control scheme is...
The paper describes the method for indirect determination of the torque, power and energy indices of an induction motor shaft. A developed research laboratory stand is presented. It enables load testing of an induction motor with a possibility of direct measuring the torque, speed, currents and voltages of the researched motor. The analysis of the experimental research of the method for indirect determination...
Most control papers related to variable speed drives are focused on the current and torque control of the electric machine. However, the slower outer loop is also very important. This considers the control of a variable parameter resonant rotating load using a novel control algorithm called Local Vector Control (LVC). Resonant loads naturally occur in, for example, building elevator applications....
This paper describes a method for combining a control scheme for remote control under time delay with online estimation. In the proposed method, a driving assistant is used to react to events that occur in a horizon of the network round trip delay. Since such an approach result in the driving assistant torque echoing back into the remote controlled car, the proposed method design compensates for this...
Dynamic Compression Plate (DCP) Is the most popular type of implant plate that facilitate compressing the fracture bone during implantation. However, the price of DCP is still expensive according to developing contries people. The price of DCP mostly related to its manufacturing that involved many machining processes. The proposed solution offered in this study was to change DCP manufacturing process...
This paper is concerned with the increase of the damping behavior of an engine test bed by suitable extending the control strategy of a standard engine test bed with respect to the test of high charged, small displacement combustion engines used in modern hybrid powertrain concepts. Especially in high performance engines (e.g. such as for race cars) the outbid boosting with electrical driven turbo...
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 electromagnetic arresting gear is one type aircraft arresting gear. It's electromagnetic force can be adjusted precisely, and it is an important safeguard that it arrests the aircraft veering off the runway and ensures the aircrafts safely landing. Arresting cable is an essential part of arresting gear, and its performance has a significant impact on arresting process. This paper studies the dynamics...
Following paper presents development and results of finite element structural simulations prepared in order to estimate contact pressure distribution on teeth flanks of gear transmission caused by assembly errors. In first paragraphs, importance of alignment precision of gear transmission components is described. As well, influence of machining and assembly errors on spur gear transmission was introduced...
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...
In this paper, the interfacing of the type-1 wind turbine employing double cage induction generator to the grid is presented. Rotor instability performance of this system is studied and a detailed comparison is done with the single-cage. Steady-state torque-speed characteristics are compared and the results are validated through transient and eigenvalue analysis. The effect of wind turbine characteristics...
There is a general phenomenon of dynamic disturbances caused by the mechanical resonance caused by the elasticity of the connecting device and the change of the load in the common electric traction mechanism such as rolling mill and robot joint. Aiming at this problem, the two - mass modeling of the rolling mill and other transmission equipment is carried out, and the related mechanism is analyzed...
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