Design of a swing operation assist controller with a local feedback compensator for a hydraulic excavator

2021 ◽  
Author(s):  
Yuma Morota ◽  
Masatoshi Kozui ◽  
Toru Yamamoto ◽  
Kazushige Koiwai ◽  
Koji Yamashita
Keyword(s):  
Hydraulic Excavator ◽  
Local Feedback

Construction of the Index to Evaluate the Operating Skill Based on the Motion of CoM for a Hydraulic Excavator

2019 ◽  
Vol 139 (4) ◽  
pp. 388-394 ◽  
Author(s):  
Masatoshi Kozui ◽  
Kazushige Koiwai ◽  
Toru Yamamoto ◽  
Koji Ueda ◽  
Koji Yamashita ◽  
...  
Keyword(s):  
Hydraulic Excavator

IMPROVEMENT OF THE HYDRAULIC EXCAVATOR BUCKET DESIGN

2019 ◽  
Vol 16 (3) ◽  
pp. 202-213 ◽  
Author(s):  
G. G. Buriy ◽  
V. S. Shherbakov ◽  
S. B. Skobelev ◽  
V. F. Kovalevskiy
Keyword(s):  
Cost Reduction ◽  
Production Costs ◽  
Hydraulic Excavator ◽  
Engineering Structures ◽  
Excavator Bucket ◽  
Productivity Increase ◽  
Hydraulic Excavators ◽  
Reducing Costs ◽  
Rational Operation ◽  
Resistance Forces

Introduction.Construction of engineering structures is impossible without building and road machines. The large volume of financing is allocated for such machines’ purchase. The main ways of reducing costs of the equipment consist in more rational operation of the equipment and also in decrease of equipment’s cost by constructive changes. The paper demonstrates the new design of the single-bucket hydraulic excavator with smaller cost.Materials and methods.The main ways of cost reduction for construction machines are more rational operation and depreciation of a design with the required characteristics’ maintaining. The paper describes constructive changes of the working equipment of the single-bucket hydraulic excavator, which allow decreasing the production costs.Results.The authors describe the new bucket design of the single-bucket hydraulic excavator. Moreover, the authors carry out the analysis of the existing buckets’ design. The paper also illustrates the functioning on bucket forces while digging process. The authors describe the solutions of the problem for productivity increase of the single-bucket in hydraulic excavators. In addition, the authors make the scheme of the bucket loading while digging process. Such scheme helps to reduce resistance forces of digging.Discussion and conclusions.As a result, the paper presents the design of the working equipment of the hydraulic excavator’s single-bucket, which allows reducing resistance forces of digging. Such results would help to establish buckets of bigger capacity and would lead to the productivity increase.

System of Digging Force Monitoring and Backhoe Tip Localization for Medium-Sized Hydraulic Excavator

1991 ◽  
Author(s):  
Marek M. Poncyliusz ◽  
Jan Szlagowski
Keyword(s):  
Hydraulic Excavator ◽  
Force Monitoring ◽  
Digging Force

Reaching Difficulty Model of Swinging Operations of a Hydraulic Excavator Considering the First-Order Delay

2020 ◽  
Author(s):  
Kazuyuki Matsumura ◽  
Masaru Ito ◽  
Chiaki Raima ◽  
Seiji Saiki ◽  
Yoichiro Yamazaki ◽  
...  
Keyword(s):  
Hydraulic Excavator ◽  
First Order

Safety and Reassurance Design for Hydraulic Excavator

2007 ◽  
Vol 110 (1067) ◽  
pp. 780-783
Author(s):  
Masakazu ITOH
Keyword(s):  
Hydraulic Excavator

scholarly journals Time-delayed local feedback control for a chaotic finance system

2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
Erfeng Xu ◽  
Yingrui Zhang ◽  
Yonggang Chen
Keyword(s):  
Feedback Control ◽  
Finance System ◽  
Local Feedback

scholarly journals Design of a Database-Driven Excavation Assist Controller Based on the Velocity of the Center-of-Mass for a Hydraulic Excavator

IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 64776-64784
Author(s):  
Masatoshi Kozui ◽  
Toru Yamamoto ◽  
Hideo Yoshihara ◽  
Kazushige Koiwai ◽  
Koji Yamashita
Keyword(s):  
Center Of Mass ◽  
Hydraulic Excavator

scholarly journals Rapid intra-adrenal feedback regulation of glucocorticoid synthesis

2015 ◽  
Vol 12 (102) ◽  
pp. 20140875 ◽  
Author(s):  
J. J. Walker ◽  
F. Spiga ◽  
R. Gupta ◽  
Z. Zhao ◽  
S. L. Lightman ◽  
...  
Keyword(s):  
Adrenal Glands ◽  
Feedback Regulation ◽  
Feedback Mechanism ◽  
Acth Secretion ◽  
Primary Mechanism ◽  
Acth Receptor ◽  
Local Feedback ◽  
Short Time ◽  
Pituitary Adrenal Axis ◽  
Short Time Delay

The hypothalamic–pituitary–adrenal axis is a vital neuroendocrine system that regulates the secretion of glucocorticoid hormones from the adrenal glands. This system is characterized by a dynamic ultradian hormonal oscillation, and in addition is highly responsive to stressful stimuli. We have recently shown that a primary mechanism generating this ultradian rhythm is a systems-level interaction where adrenocorticotrophin hormone (ACTH) released from the pituitary stimulates the secretion of adrenal glucocorticoids, which in turn feedback at the level of the pituitary to rapidly inhibit ACTH secretion. In this study, we combine experimental physiology and mathematical modelling to investigate intra-adrenal mechanisms regulating glucocorticoid synthesis. Our modelling results suggest that glucocorticoids can inhibit their own synthesis through a very rapid (within minutes), presumably non-genomic, intra-adrenal pathway. We present further evidence for the existence of a short time delay in this intra-adrenal inhibition, and also that at the initiation of each ACTH stimulus, this local feedback mechanism is rapidly antagonized, presumably via activation of the specific ACTH receptor (MC2R) signalling pathway. This mechanism of intra-adrenal inhibition enables the gland to rapidly release glucocorticoids while at the same time preventing uncontrolled release of glucocorticoids in response to large surges in ACTH associated with stress.

Sign in / Sign up

Export Citation Format

Share Document