Modeling and Simulation of Electric Drive Bulldozer Based on the Torque Control

2013 ◽  
Vol 310 ◽  
pp. 236-239 ◽  
Author(s):  
Zhi Chao Zhou ◽  
Xiao Ling Chen ◽  
Yuan Zou
Keyword(s):  
Job Performance ◽  
Electric Drive ◽  
Performance Index ◽  
Slip Rate ◽  
Transmission System ◽  
Torque Control ◽  
Power Performance ◽  
Simulation Results ◽  
Operation Cycle ◽  
Ac Induction Motor

According to the power performance index of the bulldozer, the matching calculation of electric drive tracked bulldozer transmission system is put forward, including AC induction motor, reduction ratios between motors and sprockets, engine-generator. Combined with the slip rate simulation of the special operation cycle conditions of bulldozer eletromechanical transmission system based on Matlab/Simulink is performed. Simulation results show that the dynamic characteristic satisfy the requirements of the job performance of the bulldozer. The matching calculation of the eletromechanical transmission system for bulldozer proved itself to be effective and feasible.

SIMULATION OF SOFT START OF SYNCHRONOUS ELECTRIC DRIVES

2019 ◽  
Author(s):  
Shakhboz Dadabaev
Keyword(s):  
Computer Simulation ◽  
Electric Drive ◽  
Water Supply Systems ◽  
Factors Affecting ◽  
Electric Drives ◽  
Soft Start ◽  
Simulation Results ◽  
Pumping Units ◽  
Negative Factors ◽  
Supply Systems

The main negative factors affecting the starting modes of synchronous electric drives of pumping units of irrigation water supply systems were identified, computer simulation of direct and soft start of synchronous electric drive was made, the simulation results are shown in graphs and a brief conclusion was made on the study.

scholarly journals Optimizing Transmit Sequence and Instrumental Variables Receiver for Dual-Function Complexity System

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Yu Yao ◽  
Junhui Zhao ◽  
Lenan Wu
Keyword(s):  
Approximate Solution ◽  
Instrumental Variables ◽  
Performance Index ◽  
Dual Function ◽  
Np Hard ◽  
Match Filter ◽  
Filter Output ◽  
Phase Code ◽  
Discrete Phase ◽  
Simulation Results

This correspondence deals with the joint cognitive design of transmit coded sequences and instrumental variables (IV) receive filter to enhance the performance of a dual-function radar-communication (DFRC) system in the presence of clutter disturbance. The IV receiver can reject clutter more efficiently than the match filter. The signal-to-clutter-and-noise ratio (SCNR) of the IV filter output is viewed as the performance index of the complexity system. We focus on phase only sequences, sharing both a continuous and a discrete phase code and develop optimization algorithms to achieve reasonable pairs of transmit coded sequences and IV receiver that fine approximate the behavior of the optimum SCNR. All iterations involve the solution of NP-hard quadratic fractional problems. The relaxation plus randomization technique is used to find an approximate solution. The complexity, corresponding to the operation of the proposed algorithms, depends on the number of acceptable iterations along with on and the complexity involved in all iterations. Simulation results are offered to evaluate the performance generated by the proposed scheme.

Speed regulation control of tractors’ new dual-flow transmission system based on slip rate resistance classification

2021 ◽  
pp. 095440702110105
Author(s):  
Guang Xia ◽  
Yan Xia ◽  
Xiwen Tang ◽  
Linfeng Zhao ◽  
Baoqun Sun
Keyword(s):  
Control Strategy ◽  
Control Algorithm ◽  
Production Efficiency ◽  
Sliding Mode ◽  
Slip Rate ◽  
Speed Control ◽  
Working Environment ◽  
Vehicle Speed ◽  
Speed Change ◽  
Simulation Results

Fluctuations in operation resistance during the operating process lead to reduced efficiency in tractor production. To address this problem, the project team independently developed and designed a new type of hydraulic mechanical continuously variable transmission (HMCVT). Based on introducing the mechanical structure and transmission principle of the HMCVT system, the priority of slip rate control and vehicle speed control is determined by classifying the slip rate. In the process of vehicle speed control, the driving mode of HMCVT system suitable for the current resistance state is determined by classifying the operation resistance. The speed change rule under HMT and HST modes is formulated with the goal of the highest production efficiency, and the displacement ratio adjustment surfaces under HMT and HST modes are determined. A sliding mode control algorithm based on feedforward compensation is proposed to address the problem that the oil pressure fluctuation has influences on the adjustment accuracy of hydraulic pump displacement. The simulation results of Simulink show that this algorithm can not only accurately follow the expected signal changes, but has better tracking stability than traditional PID control algorithm. The HMCVT system and speed control strategy models were built, and simulation results show that the speed control strategy can restrict the slip rate of driving wheels within the allowable range when load or road conditions change. When the tractor speed is lower than the lower limit of the high-efficiency speed range, the speed change law formulated in this paper can improve the tractor speed faster than the traditional rule, and effectively ensure the production efficiency. The research results are of great significance for improving tractor’s adaptability to complex and changeable working environment and promoting agricultural production efficiency.

Study on Direct Torque Control Applied in the Electrical Propulsion Ship

2011 ◽  
Vol 354-355 ◽  
pp. 1252-1256
Author(s):  
You Tao Zhao ◽  
Yan Cheng Liu ◽  
Jun Jie Ren
Keyword(s):  
Electric Propulsion ◽  
Control Method ◽  
Direct Torque Control ◽  
Torque Control ◽  
Regulation System ◽  
Propulsion Systems ◽  
Speed Regulation ◽  
Imple Mentation ◽  
Electrical Propulsion ◽  
Simulation Results

With the development of AC (alternating current )technique, larger power PMSM ( permanent m- agnet synchronous motor ) has been applied in the marine electric propulsion systems. In this paper the imple- mentation of the DTC (direct torque control) systems for a variable-speed 4088kW PMSM in ship electric propulsion systems has been studied. A novel control method using SVPWM (space vector pulse width mo- dulation) was proposed and a SVPWM module was designed. Then a DTC – SVPWM simulation model of PMSM with the load of propeller was found. The simulation results shows that the variable frequency speed regulation system have good response performance in the process of the motor start or speedup and through comparing the simulation results with the experiment data of the PMSM, the validity of the model is verified.

Research of UHV DC Transmission Based on the Current Control

2011 ◽  
Vol 143-144 ◽  
pp. 19-23
Author(s):  
Hai Long Zhao ◽  
Zhong Ying Lin
Keyword(s):  
Transmission System ◽  
Current Control ◽  
Good Effect ◽  
Submarine Cable ◽  
Long Distance ◽  
Harmonic Control ◽  
Dc Power ◽  
Current Transmission ◽  
Simulation Results ◽  
Time Type

Compared with AC (alternating current) transmission, DC(direct current) transmission has obvious superiority at high power, long distance, submarine cable transmission and asynchronous interconnected between exchange systems etc.. This paper constructed a kind of 12 pulse bridge UHV DC transmission system that includes control protection function through MATLAB/Simulink tool. By setting the breaker parameters, this paper studied the 12 pulse bridge UHV DC transmission system AC/DC side in case of setting down time, type and cleared. The simulation results demonstrate that this system has a good effect in harmonic control and it has no power compensations in realizing HV DC process, and it can completely work as an important reference in constructing HV DC power grid.

Prototype of an Electric Drive Elevator

2017 ◽  
Vol 0 (0) ◽  
Author(s):  
M. Gaiceanu ◽  
S. Epure ◽  
C. R. Dache ◽  
S. Ciuta
Keyword(s):  
Electric Drive ◽  
Induction Machine ◽  
Power Converter ◽  
Experimental Platform ◽  
Electric Drive System ◽  
Ac Power ◽  
Three Phase ◽  
Chain Transmission ◽  
Simulation Results ◽  
Quality Features

Abstract The research purpose of the authors is reducing the energy consumption of the main worldwide consumer - the electric motors- by useful utilization of the input energy through the Regenerative Electric Drive System having also the power quality features. The prototype of the electric elevator consists mainly of two trolley: one serve for the active load, and the other as counterweight, gearbox, power converter, induction machine and chain transmission. The elevator is driven by using 4kW three-phase induction machine through AC-AC power converter and has the capacity of 450 kg. The numerical simulation results and the experimental platform are shown.

A Terrestrial Digital Broadcasting and Positioning System Based on Overlap Communication

2014 ◽  
Vol 568-570 ◽  
pp. 1282-1286
Author(s):  
Guo Cheng Wu ◽  
Zhan Xin Yang ◽  
Wei Zhang Xu
Keyword(s):  
Communication Theory ◽  
Digital Transmission ◽  
Performance Degradation ◽  
Transmission System ◽  
Positioning System ◽  
Navigation Signal ◽  
Performance Deterioration ◽  
Digital Broadcasting ◽  
Simulation Results

Inspired by the overlap communication theory, a new onshore radio positioning system which superimposed on terrestrial digital transmission system is proposed in this paper. This system overlaps but not affects existing terrestrial digital broadcasting.At the receiver, a reconstruction/cancellation algorithm.is implied to capture the navigation signal and positioning measurements precisely.This paper focus on the construction of overlap system,spreading navigation signal and the capture of positioning measurements.We give a method to generate spreading navigation signal and overlap with terrestrial digital transmission system.The method can reduce the performance degradation due to pilot interference. We also proposes a reconstruction/cancellation algorithm which can solution the capture performance deterioration caused by overlapped system . The simulation results show that this system proposed in this paper can be used in terrestrial digital transmission system and provide good positional function.

Proposal of unmanned ground vehicle powered by fuel cell

2021 ◽  
Vol 16 (1) ◽  
pp. 5-13
Author(s):  
Vladimír Popardovský ◽  
◽  
Peter Bondra ◽  
Lukáš Novotný ◽  
◽  
...  
Keyword(s):  
Fuel Cell ◽  
Electric Drive ◽  
Graphical Form ◽  
Unmanned Ground Vehicle ◽  
Simulation Environment ◽  
Ground Vehicle ◽  
Technical Parameters ◽  
Simulation Results ◽  
Physical Quantities ◽  
Over Time

The presented article deals with the design of an unmanned ground vehicle (UGV) with electric drive, using a fuel cell as a source of electricity. The introduction describes the principle of the fuel cell, followed by the design of the UGV propulsion system. The UGV design, taking into account specific technical parameters, is processed into a model in the simulation environment MATLAB / Simulink / Simscape. Simulation results are presented in graphical form of selected physical quantities over time.

Analysis and Implementation of Raptor Codes for Video Multicast

2013 ◽  
Vol 347-350 ◽  
pp. 3845-3849
Author(s):  
Geng Wei ◽  
Cong Juan Li ◽  
Yu Dong Zhang
Keyword(s):  
Packet Loss ◽  
Video Transmission ◽  
System Simulation ◽  
Video Quality ◽  
Transmission System ◽  
Ip Multicast ◽  
Raptor Codes ◽  
Video Multicast ◽  
Simulation Results

Packet loss is unavoidable in IP multicast using the UDP protocol that will serious influence video quality. In this paper we use the Raptor codes for video multicast to improve the video quality. Firstly, the principle of Raptor codes is analyzed in detail. Then the Raptor codes is implemented and transplanted in the video transmission system. Simulation results show that the video transmission system with Raptor FEC works which can overcome the packet loss effectively and improve the playback quality significantly.

Investigation of Motor-Generator Integration System for Electric Vehicle Based on Induction Motor and Fuzzy Control

2011 ◽  
Vol 328-330 ◽  
pp. 2172-2180 ◽  
Author(s):  
Zhi Long Xing ◽  
Yang Liu ◽  
Yun Feng Liu
Keyword(s):  
Control System ◽  
Fuzzy Control ◽  
Induction Motor ◽  
Electric Vehicle ◽  
Control Strategy ◽  
Energy Recovery ◽  
Direct Torque Control ◽  
Torque Control ◽  
Torque Control Strategy ◽  
Ac Induction Motor

Aiming to solve the energy saving problem in modern electric vehicle, we propose a motor-generator integration control system based on the induction motor and the fuzzy control theory in this paper. A motor-generator hardware platform is built up using the four quadrant characteristic of AC induction motor. The AC induction motor works both as driving motor of the electric vehicle and as well as the energy recovery generator. Specifically, the fuzzy direct torque control strategy is adopted in the motor state, and fuzzy instantaneous torque control strategy in power generation state. A simulation is carried out to analyze the practicality of the proposed control method, the simulation results show that the fuzzy torque control technology is well performed. Finally, a simulative energy recovery experimental platform is built up to test the proposed integration control system, and results shown that the efficiency of energy recovery could be up to 97.3%.

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