scholarly journals Improving the mathematical stability in the numerical simulation of the vehicle movement with an electronic movement control system

2021 ◽  
Vol 2061 (1) ◽  
pp. 012092
Author(s):  
E V Balakina ◽  
D S Sarbaev ◽  
I V Sergienko
Keyword(s):  
Numerical Simulation ◽  
Control System ◽  
Movement Control ◽  
Turning Angle ◽  
Surface Change ◽  
Hard Surface ◽  
System A ◽  
Vehicle Movement

Abstract The aim of the study is to determine the influence of the calculated radius type on the calculated parameters of the vehicle movement, equipped with an electronic movement control system. A numerical simulation of the vehicle movement equipped with an electronic movement control system was carried out. Under calculated conditions, there are forces that disrupt the stable and controlled vehicle movement. The studies carried out have shown that in the numerical simulation of the parameters of the vehicle movement, the use of a dynamic radius instead of a rolling radius never affects the calculated values of the vehicle’s longitudinal shifts. In this case, the values of the lateral shifts and the turning angle of the vehicle on a dry hard surface change insignificantly, but there is a significant mathematical instability of the solution. On a wet hard surface, the influence of the calculated radii types on the characteristics of the simulated vehicle movement is preserved, but this influence is less pronounced.

scholarly journals Methodology and algorithms for buildinga telematic automated vehicle movement control system

2020 ◽  
Vol 17 (6) ◽  
pp. 206-213
Author(s):  
E. V. Morozov ◽  
Keyword(s):  
Control System ◽  
Movement Control ◽  
Optimal Choice ◽  
Measuring Instruments ◽  
Continuous Control ◽  
Automated Control ◽  
Road Users ◽  
Technical Requirements ◽  
Automated Control System ◽  
Vehicle Movement

The article proposes promising trends of research in the field of building automated systems for controlling the movement of transport vehicles (TS) in order to ensure a continuous monitoring and operational control. A method for substantiating technical requirements and assessing the characteristics of measuring instruments for automated control of vehicle movement, an algorithm for determining the optimal values of characteristics of measuring tools and an algorithm for choosing the optimal version of telematic automatic control devices (TASK) for vehicle movement have been developed. The concept of a telematic automated control system for controlling the movement of vehicles (TASU CD TS) is formulated. The presented results make it possible to build the TASU CD of the vehicle based on the optimal choice of TASK movement and the assessment of the effectiveness of their application. Creation of a local telematic automated control system for controlling the movement of the vehicle will effectively manage traffic flows through the implementation of continuous control and monitoring of the vehicle along the entire route of movement, and operational coordination of the interactions of all road users, special services and departments.

scholarly journals Numerical Simulation of Depth Tracking Control of an Underwater Towed System Coupled with Wave–Ship Interference

2021 ◽  
Vol 9 (8) ◽  
pp. 874
Author(s):  
Xianyuan Yang ◽  
Jiaming Wu ◽  
Quanlin Li ◽  
Haiyan Lv
Keyword(s):  
Numerical Simulation ◽  
Control System ◽  
Tracking Control ◽  
Stokes Equations ◽  
Numerical Study ◽  
Fluid Motion ◽  
System A ◽  
Head Waves ◽  
Longitudinal Position ◽  
Mesh Technique

This paper presents a numerical study of the depth tracking control for an underwater towed system under wave–ship interference condition. To overcome the laminations of ignoring the hydrodynamic factors and wave–ship interference in the existing simulation model for the depth tracking operation of the underwater towed system, a numerical model combining the control system with the computational fluid dynamics (CFD) method based on the overset mesh technique is explored and constructed; the influence of towing ship and head waves is introduced into the numerical analysis of the underwater towed system; a depth control system based on the center of gravity adjustment is proposed and its control characteristics are discussed. The fluid motion around the towed vehicle and the towing ship is governed by the Navier–Stokes equations, and the overset mesh technique is applied for the numerical solution of the equations. The towing cable connecting the towed vehicle and towing ship is governed by the quasi-steady-state catenary equations. The depth tracking controller adjusting the longitudinal position of a shifting weight is constructed based on the proportional–integral–derivative (PID) algorithm. The simulation results show that the numerical simulation system is practicable, and the depth tracking control system is feasible, effective, and robust.

Evidence on Food Control System in Charitable Food Assistance System: A Systematic Scoping Review

2018 ◽  
Author(s):  
Sizwe Makhunga ◽  
Tivani P. Mashamba-Thompson ◽  
Mbuzeleni Hlongwa ◽  
Khumbulani W. Hlongwana
Keyword(s):  
Control System ◽  
Scoping Review ◽  
Food Assistance ◽  
Assistance System ◽  
Food Control ◽  
System A

Multi-layer controller with state-constraint: Vehicle lateral stability control based on fuzzy logic

2021 ◽  
pp. 095440702110142
Author(s):  
Neng Wan ◽  
Guangping Zeng ◽  
Chunguang Zhang ◽  
Dingqi Pan ◽  
Songtao Cai
Keyword(s):  
Control System ◽  
Integrated Control ◽  
State Constraint ◽  
Stability Control ◽  
Lateral Stability ◽  
System A ◽  
Velocity Reduction ◽  
Vehicle Velocity ◽  
Allowable Range ◽  
Simulation Results

This paper deals with a new state-constrained control (SCC) system of vehicle, which includes a multi-layer controller, in order to ensure the vehicle’s lateral stability and steering performance under complex environment. In this system, a new constraint control strategy with input and state constraints is applied to calculate the steady-state yaw moment. It ensures the vehicle lateral stability by tracking the desired yaw rate value and limiting the allowable range of the side slip. Through the linkage of the three-layer controller, the tire load is optimized and achieve minimal vehicle velocity reduction. The seven-degree-of-freedom (7-DOF) simulation model was established and simulated in MATLAB to evaluate the effect of the proposed controller. Through the analysis of the simulation results, compared with the traditional ESC and integrated control, it not only solves the problem of obvious velocity reduction, but also solves the problem of high cost and high hardware requirements in integrated control. The simulation results show that designed control system has better performance of path tracking and driving state, which is closer to the desired value. Through hardware-in-the-loop (HIL) practical experiments in two typical driving conditions, the effectiveness of the above proposed control system is further verified, which can improve the lateral stability and maneuverability of the vehicle.

Servo Drive Trajectory Design of Three-Axis Laser Processing System

2014 ◽  
Vol 529 ◽  
pp. 139-143
Author(s):  
Wei Hua Jiang ◽  
Yuan Cheng Fan ◽  
Da Zeng
Keyword(s):  
Control System ◽  
Processing System ◽  
Movement Control ◽  
Linear Interpolation ◽  
Numerical Control ◽  
Trajectory Design ◽  
Servo Drive ◽  
Digital Integrator ◽  
Detector Resolution ◽  
And Control

Three-axis processing of laser inner engraving machine control system can carry on multi-axis linkage control. Furthermore, it ensures multi-axis of high feeding speed and trajectory control of high precision. This article introduces the design of laser inner engraving machine movement control system. The core is a digital integrator of linear interpolation algorithm to generate the desired trajectory and control XYZ axis linkage. Wide speed range of servo motor and position detector resolution is adequate to constitute a half-closed loop drive. With integral separation algorithm being introduced in the controller, the speed of numerical control system, track speed and positioning accuracy are guaranteed in order to achieve optimal specification for dynamic and static characteristics of the whole system.

scholarly journals Decentralized Optimization for a Novel Control Structure of HVAC System

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Shiqiang Wang ◽  
Jianchun Xing ◽  
Ziyan Jiang ◽  
Juelong Li
Keyword(s):  
Control System ◽  
Decentralized Control ◽  
Control Structure ◽  
Optimization Method ◽  
Labor Cost ◽  
Smart Device ◽  
Hvac System ◽  
Decentralized Optimization ◽  
System A ◽  
Novel Method

A decentralized control structure is introduced into the heating, ventilation, and air conditioning (HVAC) system to solve the high maintenance and labor cost problem in actual engineering. Based on this new control system, a decentralized optimization method is presented for sensor fault repair and optimal group control of HVAC equipment. Convergence property of the novel method is theoretically analyzed considering both convex and nonconvex systems with constraints. In this decentralized control system, traditional device is fitted with a control chip such that it becomes a smart device. The smart device can communicate and operate collaboratively with the other devices to accomplish some designated tasks. The effectiveness of the presented method is verified by simulations and hardware tests.

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