Synthesis of a system of inertial dynamic stabilization with control according to a set of parameters measured on board of a self-propelled vehicle

The work is devoted to the development of the inertial dynamic damping and stabilization of self-propelled transport and technological machines with a mounted working body. The necessity and possibility of improving the previously developed control equations for the stabilization system is substantiated. The description of the approach for the synthesis of the control system is given and the application of integral criteria for the formation of requirements for the transient processes of the control system is substantiated. A model of optimal control is proposed. Its information area is determined by a set of parameters measured on board of the self-propelled vehicle. The algorithm of the control system is adaptive, automatically reconfiguring the gain in the system depending on the change in its inertial parameters. The kinematic diagram of the drive of the modern forage harvester adapter was taken as an example to present a design diagram for recalculating the values of the re-quired stabilizing moments into the force developed by a hydraulic cylinder or other actuator. The requirements for the information field of the stabilization system are given in the form of a set of measured parameters, the range of their measurements, the locations of the sensors and the permis-sible measurement errors. A set of criteria for the effectiveness and efficiency of the stabilization system is proposed. On the basis of numerical experiments, the values of the tuning coefficients of the stabilization system were selected and the transient processes of changes in the angles of the longitudinal inclination and the longitudinal angular velocity of the body under a single shock load-ing of the machine were constructed. It is shown that the proposed approach provides asymptotic stability of the considered oscillatory system. In order to assess the performance on the basis of simulation modeling, oscillograms of changes in the angles of rotation of the adapter and the forces on the rod of the hydraulic cylinder when the combine moves with the stabilization system turned on on a dirt road and asphalt concrete at different speeds were constructed. The evaluation of the development efficiency is given. The conditions for the modernization of the existing generation of combines for their equipping with the proposed stabilization system are formulated. Conclusions are formulated and directions for further research are determined.

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Bond Graph Simulation of Error Propagation in Position Estimation of a Hydraulic Cylinder Using Low Cost Accelerometers

Energies ◽

10.3390/en11102603 ◽

2018 ◽

Vol 11 (10) ◽

pp. 2603 ◽

Cited By ~ 1

Author(s):

Antonio Algar ◽

Esteban Codina ◽

Javier Freire

Keyword(s):

Measurement Errors ◽

High Performance ◽

Low Cost ◽

Hydraulic Cylinder ◽

Bond Graph ◽

Position Estimation ◽

The Body ◽

Visual Signal ◽

Bias Error ◽

Operating Cycle

The indirect calculation from acceleration of transversal displacement of the piston inside the body of a double effect linear hydraulic cylinder during its operating cycle is assessed. Currently an extensive effort exists in the improvement of the mechanical and electronic design of the highly sophisticated MEMS accelerometers. Nevertheless, the predictable presence of measurement errors in the current commercial accelerometers is the main origin of velocity and displacement measurement deviations during integration of the acceleration. A bond graph numerical simulation model of the electromechanical system has been developed in order to forecast the effect of several measurement errors in the use of low cost two axes accelerometers. The level of influence is assessed using quality indicators and visual signal evaluation, for both simulations and experimental results. The obtained displacements results are highly influenced by the diverse dynamic characteristics of each measuring axis. The small measuring errors of a simulated extremely high performance sensor generate only moderate effects in longitudinal displacement but deep deviations in the reconstruction of piston transversal movements. The bias error has been identified as the source of the higher deviations of displacement results; although, its consequences can be easily corrected.

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Increase of Dynamic Precision and Quality Index for Transient Processes of an Automatic Control System for Magnetic Levitation by Means of Differential Connection. Part II. System for Automatic Control of Magnetic Suspension with Differential Constraint

Journal of Automation and Information Sciences ◽

10.1615/jautomatinfscien.v39.i10.10 ◽

2007 ◽

Vol 39 (10) ◽

pp. 1-21

Author(s):

Grigoriy F. Zaitsev ◽

G. V. Bursov

Keyword(s):

Control System ◽

Automatic Control ◽

Automatic Control System ◽

Quality Index ◽

Magnetic Levitation ◽

Magnetic Suspension ◽

Transient Processes ◽

Differential Constraint ◽

Dynamic Precision

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Enhancing Dynamic Accuracy and Quality Indices of Transient Processes of Magnetic Suspension Automatic Control System by Means of Differential Connection.Part I.Analysis of Dynamic Characteristics of Automatic Control System of Carrier Magnetic Suspension

Journal of Automation and Information Sciences ◽

10.1615/jautomatinfscien.v39.i8.10 ◽

2007 ◽

Vol 39 (8) ◽

pp. 1-10

Author(s):

Grigoriy F. Zaitsev ◽

G. V. Bursov

Keyword(s):

Control System ◽

Automatic Control ◽

Automatic Control System ◽

Dynamic Characteristics ◽

Magnetic Suspension ◽

Transient Processes ◽

Quality Indices ◽

Dynamic Accuracy

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Analysis of the System of Controlling Paid Parking Zones

Sustainability ◽

10.3390/su13084211 ◽

2021 ◽

Vol 13 (8) ◽

pp. 4211

Author(s):

Maciej Kozłowski ◽

Andrzej Czerepicki ◽

Piotr Jaskowski ◽

Kamil Aniszewski

Keyword(s):

Control System ◽

Smart City ◽

Measurement Errors ◽

Fundamental Problem ◽

Urban Traffic ◽

Statistical Dependence ◽

Actual State ◽

Event Time ◽

Operational Data

Urban traffic can be curbed in various ways, for instance, by introducing paid unguarded parking zones (PUPZ). The operational functionality of this system depends on whether or not the various system features used to document parking cases function properly, including those which enable positioning of vehicles parked in the PUPZ, recognition of plate numbers, event time recording, and the correct anonymisation of persons and other vehicles. The most fundamental problem of this system is its reliability, understood as the conformity of control results with the actual state of matters. This characteristic can be studied empirically, and this article addresses the methodology proposed for such an examination, discussed against a case study. The authors have analysed the statistical dependence of the e-control system’s measurement errors based on operational data. The results of this analysis confirm the rationale behind the deployment of the e-control system under the implementation of the smart city concept in Warsaw.

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Application of PLC in the Expressway Intelligent Traffic Control System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.361-363.2219 ◽

2013 ◽

Vol 361-363 ◽

pp. 2219-2223

Author(s):

Xin Hua Wei ◽

Xian Xing Duan ◽

Xiao Kan Wang

Keyword(s):

Control System ◽

Traffic Control ◽

Flow Speed ◽

The Body ◽

Host Computer ◽

Scientific Management ◽

Traffic Lights ◽

Traffic Control System ◽

Vehicle Size ◽

Sense Coil

The expressway intelligent traffic control system based on S7-200 series Programmable Logic Controller (PLC) was introduced in this paper.PLC has strong adaptability in the complex environment and rich internal timer resources, it is easily to realize accuracy controlling the traffic lights, specially for multi-crossroads.PLC analyzed and processed the signals of the body flow, speed, vehicle size and other data by the sense coil, then transmitting the information to the host computer. The host computer might automatically adjust the length of time from the final signal to achieve intelligent scientific management of traffic lights.

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Walking Machine Design Based on Certain Aspects of Insect Leg Design

22nd Biennial Mechanisms Conference: Robotics, Spatial Mechanisms, and Mechanical Systems ◽

10.1115/detc1992-0259 ◽

1992 ◽

Author(s):

E. F. Fichter ◽

D. R. Kerr

Keyword(s):

Control System ◽

Observational Data ◽

The Body ◽

Static Equilibrium ◽

Machine Design ◽

Ground Contact ◽

Careful Attention ◽

Equilibrium Equations ◽

Walking Machine ◽

Leg Design

Abstract A walking machine design originating from observations of insects is presented. The primary concept derived from insects is a leg used to apply force to the body without applying significant moments about the point of body attachment. This is accomplished with legs which have kinematic equivalents to ball-and-socket joints at body attachment and ground contact, with joints in the middle which only change distance between body and ground. Standing and walking with 6 legs of this design requires careful attention to static equilibrium equations but does not necessitate a control system which actively distributes forces to the legs. This paper considers necessary observational data, assumptions on which control is based, mathematical development for control and problems such as foot slip.

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Fuzzy sliding mode control with state estimation for velocity control system of hydraulic cylinder using a new hydraulic transformer

European Journal of Control ◽

10.1016/j.ejcon.2018.11.005 ◽

2019 ◽

Vol 48 ◽

pp. 104-114 ◽

Cited By ~ 13

Author(s):

Wei Shen ◽

Jiehao Wang ◽

Honglei Huang ◽

Junyi He

Keyword(s):

Control System ◽

Sliding Mode Control ◽

State Estimation ◽

Sliding Mode ◽

Hydraulic Cylinder ◽

Velocity Control ◽

Fuzzy Sliding Mode Control ◽

Mode Control ◽

Hydraulic Transformer ◽

Fuzzy Sliding Mode

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Regional Signal Recognition of Body Sounds

Journal of Intelligent Systems with Applications ◽

10.54856/jiswa.202112187 ◽

2021 ◽

pp. 157-160

Author(s):

Osman Balli ◽

Yakup Kutlu

Keyword(s):

Neural Network ◽

Control System ◽

Neural Network Model ◽

External Environment ◽

The Body ◽

Educational Success ◽

Digital Analysis ◽

Signal Recognition ◽

Audio Signals ◽

Different Parts

One of the most important signals in the field of biomedicine is audio signals. Sound signals obtained from the body give us information about the general condition of the body. However, the detection of different sounds when recording audio signals belonging to the body or listening to them by doctors makes it difficult to diagnose the disease from these signals. In addition to isolating these sounds from the external environment, it is also necessary to separate their sounds from different parts of the body during the analysis. Separation of heart, lung and abdominal sounds will facilitate digital analysis, in particular. In this study, a dataset was created from the lungs, heart and abdominal sounds. MFCC (Mel Frekans Cepstrum Coefficient) coefficient data were obtained. The obtained coefficients were trained in the CNN (Convolution Neural Network) model. The purpose of this study is to classify audio signals. With this classification, a control system can be created. In this way, erroneous recordings that may occur when recording physicians' body voices will be prevented. When looking at the results, the educational success is about 98% and the test success is about 85%.

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