This paper proposes a compound control framework for non-affine nonlinear systems facing hysteresis disturbance. The controller consists of linear active disturbance rejection (LADRC) and backpropagation (BP) neural networks adaptive control. BP are utilized to arbitrarily approximate the uncertainty caused by deviation parameter from its nominal value LADRC is designed real-time estimate compensate with vast matched mismatched uncertainties including unknown internal system dynamic external...

A hybrid control system has been proposed for compressor surge, which combines the active method with passive method. bleed valve was selected as actuator in system. As a submode of system, fuzzy logic based controller designed to extend stability operating range compressor. Meanwhile, surge avoidance used backup-mode improve safety performance The simulation results showed that can operate steadily outside line under mode and be dragged back inside by when alternative fails. One advantage...

Multispeed transmissions are helpful for improvement of the economy and drivability electric vehicles (EVs). In this paper, we propose a two-speed transmission based on dual planetary gear mechanism, in which shifts realized by torque transfer between two brakes located ring gears. To synthesize dynamic economic performances vehicle, multiobjective optimization problem is constructed ratio Pareto-optimal solutions combinations obtained Nondominated sorting genetic algorithm-II (NSGA-II)....

Motor speed synchronization is important in gear shifting of emerging clutchless automated manual transmissions (AMT) for electric vehicles and other kinds parallel shaft-based powertrains hybrid vehicles. This paper proposes a controller design kind system integrating traction motor dual clutch transmission (DCT), using optimal control disturbances compensation. Based on the relativity between magnitudes different parameters, law simplified into proportional (P) one to ease analysis....

Radio frequency (RF) noise can severely degrade the performance of electronic circuits and wireless systems. This article proposes an analytical method to evaluate spectrum RF caused by multicarrier multipactor discharge. First, a simplified model is developed analyze electric current characteristics resonant Then, formula for discharge derived. Finally, theoretical evaluated dual-carrier operation inside silver plated rectangular waveguide. Simulation results coincided well with findings...

Purpose During the operation of a wet clutch, there are fluctuations in speed and torque, which have an impact on stability clutch strength friction plate spline pair dual steel plate. The purpose this study is to investigate vibration characteristics dynamic load pairs. Design/methodology/approach model established by piecewise linear function method, basis, equations considering plates established. Considering that has multiple pairs, equivalent number teeth tooth width were proposed,...

The reservoir structural fractures have excellent fractal characteristics, as well self-similarities. Based on the theory, surface characteristics of faults and characteristic in core Xujiahe Formation Fault-Fold Belt central Yuanba area were studied, a quantitative relationship was set up between them. faults, predictions made favorable fracture zone, which provides new idea for research fracture, offers theoretical references exploring development zone during oil-gas exploration. results...

Abstract Active control has been widely studied to expand the stable operating range of axial flow compressors in aero‐engines.In this paper, a nonlinear active state feedback controller is proposed first based on bifurcation analysis results MG model.Then by taking pressure ratio as output parameter, observer designed estimate compressor's coefficient. An thus established combining with controller.Finally, digital simulation shows that not only eliminates hysteresis loop associated rotating...

Active Power Filter (APF) has been widely used to compensate the harmonic currents which are generated by nonlinear load. Its compensation performance mainly depends on design of controller. In this paper, a novel control method based recursive integral PI algorithm and repetitive strategy proposed. Compared with traditional can not get zero-steady-state error output current due its bandwidth limitation, approach guarantees steady-state accuracy embedded control, improves dynamic response...

This paper presents a gear shift method for the dual clutch transmission (DCT) with integrated electric motor in pure drive mode. In contrast to clutch-to-clutch conventional DCT, good shifting process relies on coordinated control of and synchronizer mode hybrid DCT. To shorten torque interruption time reduce wear during engagement, key point is adjust oncoming speed output shaft rapidly. study provides regulation framework based model predictive (MPC) disturbance observer (DO), where MPC...

This paper introduces a generic function for automated modeling and feedforward control of planetary gears (PGs). Given the information on configuration, namely, internal connection relationship between each PG, location external torques, locking state clutch, this outputs ready-to-use kinetic model. The derived model can then be converted into numeric form by substituting symbols in matrix with real values used simulation, analysis or controller design. Since output is symbolic form, it...

In this paper, a trajectory-based optimization method to design FACTS in power systems is proposed, which both the quality of transient process and investment cost devices can be judiciously considered. To solve high nonlinear problem, an improved differential evolution (DE) proposed. DE evolution, chaotic operation introduced algorithm when there stagnation symptom occurs. The proposed investigated on 10-machine 39-bus New England test system primary studies have shown its effectiveness potential.

Precise motor speed regulation control is essential to achieve a good gear shifting quality of the integrated motor-transmission (IMT) system, in which relative between outgoing shaft and gearwheel be engaged can eliminated directly through speed. The confronts difficulty that there exist external disturbances on shaft, like unknown load torque arised from bearing friction, oil shearing churning, etc. To deal with these disturbances, robust controller combined nominal proportional integral...

Vacuum annealing is an important part in rare metal tube production, accurate control of the annea ling temperature has enormous influence on quality tubes.According to technological characteristics and requirements vacuum furnace ,a high precision system was built based IPC, intelligent controller thyratron transistor power-regulator.The neural network-PID strategy proposed online through OPC interface, which realized automatic detection whole process temperature. Field data indicates that...

The performance of conventional torque control for PMSM drive used in electric vehicles (EVs) from the viewpoint permanent magnet (PM) demagnetization faults has not been satisfactory. Therefore, a combination method based on sliding-mode observer and active disturbance rejection is presented. First, model system with PM constructed. Then, designed minimum extended flux linkage to estimate linkages system. A current controller presented approach reject faults. useful improve And robust...

Objective: To evaluate the postoperative complications and prognosis of renal cell carcinoma (RCC) in a solitary kidney after irreversible electroporation (IRE).Materials methods: A total 8 patients with 9 RCCs treated CT-guided IRE from February 2017 to September 2020 were retrospectively analyzed. Follow-up included contrast-enhanced computed tomography or magnetic resonance imaging examinations at 1 day, week, month, 3 months, 6 12 months each year evaluation incidence complications,...

The experimental results on solid phase epitaxy of ion beam sputtered SiGe film Si(100) substrate are presented. SiGe/Si hetero-epitaxy is achieved by high temperature thermal processes such as diffusion, annealing, and oxidation. X-ray diffraction, Raman spectroscopy, Rutherford backscattering spectroscopy show the epitaxial character Si substrate.