scholarly journals Exploitation aspects of diagnostic hydraulic and pneumatic systems of Multimedia Hybrid Mobile Stages

2021 ◽  
Vol 332 ◽  
pp. 01022
Author(s):  
Tomasz Kałaczyński ◽  
Valeriy Martynyuk ◽  
Juliy Boiko ◽  
Sergiy Matyukh ◽  
Svitlana Petrashchuk
Keyword(s):  
Risk Assessment ◽  
Control System ◽  
Control Systems ◽  
Design Process ◽  
Diagnostic Testing ◽  
Functional Fitness ◽  
Hydraulic Control ◽  
Pneumatic Control ◽  
Algorithmic Process ◽  
Testing Design

Knowledge of the technical state and construction of the hydraulic and pneumatic control system of Multimedia Hybrid Mobile Stage HMSM allows you to identify hazards and make a risk assessment. The aspects of the algorithmic process of diagnosing pneumatic and hydraulic control systems presented in the work form the basis for the development and implementation of safe solutions in the process of operation. This article describes the methodology for diagnosing HMSM machine hydraulics and industrial pneumatics systems, detailing the factors determining the correctness of maintaining functional fitness. The considerations developed illustrate the complexity of the diagnostic testing design process for condition assessment.

Is it suitable for your local governments?

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Nanang Shonhadji ◽  
Ach Maulidi
Keyword(s):  
Risk Assessment ◽  
Risk Management ◽  
Control System ◽  
Public Sector ◽  
Local Government ◽  
Control Systems ◽  
Internal Control ◽  
Internal Controls ◽  
Content Type ◽  
Fraud Mitigation

Purpose The purpose of this study is to extend existing theory by developing a contingency theory for the public sector and to provide a landscape for local government to deal with white-collar crime. In recent years, the theme of risk management and internal controls, which is popular in the industry and private sector, has been mirrored by public sector organisations. Of course, it is to improve fraud risk control systems. We have to accept that public sector organisations have a growing need to control the (fraud) risks in a rapidly changing economic environment. Within this situation an effective internal control is becoming strategically important in many organisations, as it is proving to be a cost-efficient way to manage these risks in everyday operations. Here, the authors conducted a case study on the risk management control system at an Indonesian local government. Design/methodology/approach This study uses mixed methods, integrating quantitative and qualitative data – in-depth interviews and questionnaires were required to address the social phenomenon being investigated. Findings This study found that the structure of the control system fits a generic model, in which control systems are fundamental factors to all departments. It shows that control systems can support managers to align employee capabilities, activities and performance with the organisation’s goals and missions. In addition, the authors could identify, risk assessment and monitoring activities are effective measures of controlling organisation’s activities, and potentially could diagnose potential (fraud) risks, deterring to the achievement of organisational aims. Ideally, those aspects should be performed on a continuous basis if organisations want to prevent the spread of numerous potential menaces. In other words, if an organisation fails to carry out risk assessment correctly, it will result in unidentified possibility of fraud risks. The more explicit the risk assessment, the more effective the detection of fraud. Practical implications It can be alternative to consider Committee of Sponsoring Organizations of the Treadway Commission’s internal control as fraud mitigation in local government. Originality/value This study offers new directive discussion about internal controls as notion of fraud mitigation.

Proposal of list of hazard on pressure in pneumatic control system risk assessment

2018 ◽  
Vol 2018 (0) ◽  
pp. S1720002
Author(s):  
Mizuho NAKAMURA ◽  
Tomohiro SASAKI ◽  
Masanobu CHIBA ◽  
Kaoru MITUHASHI ◽  
Tadashi ISHIZUKA
Keyword(s):  
Risk Assessment ◽  
Control System ◽  
Pneumatic Control ◽  
System Risk

The Design of the Tiny-Skin Transplanter’s Pneumatic Control System

2014 ◽  
Vol 721 ◽  
pp. 273-276
Author(s):  
Ting Ting Deng
Keyword(s):  
Control System ◽  
Design Process ◽  
Negative Pressure ◽  
Skin Transplantation ◽  
Pneumatic Control ◽  
Cutting System ◽  
Skin Cutting

This paper developed a tiny-skin transplanter which was used in making and enlarging the tiny square skin before the skin transplantation. It introduced the design process of the transplanter’s pneumatic control system which provided negative pressure to the skin-cutting platform and separating device, and controlled the rising and descending of the cutting system and separating device, and controlled the cutting platform’s rotation.

Design of a Pressure Observer and its Application to a Low-Cost Pneumatic Control System

2011 ◽  
Vol 5 (4) ◽  
pp. 493-501 ◽  
Author(s):  
Takahiro Kosaki ◽  
◽  
Manabu Sano
Keyword(s):  
Control System ◽  
Control Systems ◽  
Low Cost ◽  
Force Sensors ◽  
Pneumatic Actuators ◽  
Pneumatic Control ◽  
Full State ◽  
Full State Feedback ◽  
High Control ◽  
Pressure Observer

The nonlinear pressure observer this paper presents for pneumatic systems and observer-based approaches for controlling position and stiffness eliminate the need for pressure and force sensors. The observer estimates pressure in the pneumatic actuator chamber, acting instead of a sensor in a pressure-feedbackbased system. Conventional single-loop controllers are inadequate for pneumatic actuators because such actuators have high nonlinearities such as air compressibility and friction. Most advanced controllers providing better performance require full-state feedback, and using sensors to acquire data makes pneumatic control systems less cost-competitive than electric control systems. Combining our proposed pressure observer with other observers enables a position and stiffness control system to be designed for a two degree-of-freedom pneumatic manipulator. Force caused in contact between the manipulator and an external object can be obtained without using force sensors. Experimental results show that our observerbased approach reduces cost, enables high estimation performance, and ensures high control accuracy.

scholarly journals Seismic Risk Assessment of Actively Controlled Buildings under Probable Mainshock-Aftershock Scenarios during their Lifetime

2021 ◽  
Author(s):  
Ali Khansefid ◽  
Ali Bakhshi
Keyword(s):  
Risk Assessment ◽  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Control System ◽  
Vibration Control ◽  
Control Systems ◽  
Seismic Risk ◽  
Active Vibration Control ◽  
Earthquake Scenarios ◽  
Active Vibration

Abstract This paper focuses on a new comprehensive probabilistic approach for lifetime risk assessment of buildings equipped with active vibration control systems under future probable mainshock-aftershock scenarios. This procedure starts from the seismic hazard simulation, continues with the building performance evaluation, and ends with the seismic risk assessment. The procedure attempts to reflect the effects of major uncertainty sources existing in both building properties and earthquake scenarios using the Monte-Carlo simulation technique. The method is applied to steel moment-resisting frame buildings armed with the optimally designed active vibration control system (using the linear quadratic regulator algorithm). In each realization of the Monte-Carlo simulation, first, a random earthquake scenario containing probable future mainshock-aftershock sequences and their corresponding synthetic stochastic accelerograms are procreated. Next, the buildings are designed in two separate cases, with and without the presence of active vibration control systems. The former is designed based on the international design codes, while the latter properties are obtained via an advanced optimization method. In the last step, considering all generated samples, the loss curve of buildings with the active control system is developed for two separate cases: with or without taking aftershocks’ effects into account. The application of this method indicates that the active control system works well in decreasing the loss value (on average 66%) of buildings during their 50-year lifetime, especially in the more intensive earthquake scenarios. Additionally, it is shown that by neglecting the aftershocks, the life-cycle cost of building will be estimated tangibly (on average 70%) less than what it would be. Finally, it is observed that the non-structural acceleration-sensitive damages have a higher contribution in total building losses in uncontrolled structures in comparison with the actively controlled building by considering aftershocks.

Effect of Input Shaping on Actuator Effort of Inertial Plants

2011 ◽  
Vol 464 ◽  
pp. 138-141 ◽  
Author(s):  
Ming Xiao Dong ◽  
Bo Pang ◽  
Hui Liu ◽  
Fan Bing Li
Keyword(s):  
Control System ◽  
Control Systems ◽  
Motion Control ◽  
Design Process ◽  
Damping Ratio ◽  
Input Shaping ◽  
Pd Controller ◽  
Performance Requirement ◽  
Oscillatory Frequency ◽  
Input Shaping Control

Most motion control systems are designed to satisfy the performance requirement in transient and frequency domain. The actuator effort of the control system is rarely considered during the design process. This paper investigates the effects of input shaping on actuator effort of PD combined with input shaping control for an inertial plant subject to four standard types of inputs. The actuator efforts of the control systems are described in general fomula. The acting regulation of PD controller parameters on the oscillatory frequency and damping ratio of actuator effort is investigated and the effect of input shapping on the magnitude of actuator effort is thoroughly analyzed. The research results show that PD feedback control enhanced with input shaping can effectively reduce actuator effort compared with PD control.

scholarly journals EVALUASI PENERAPAN SISTEM PENGENDALIAN INTERNAL ATAS PENERIMAAN, PENGEMBALIAN DAN PELELANGAN BARANG JAMINAN PADA PT. PEGADAIAN (PERSERO)

2017 ◽  
Vol 6 (1) ◽  
pp. 1
Author(s):  
Fifke Masyie Siwu ◽  
Agus T. Poputra
Keyword(s):  
Risk Assessment ◽  
Control System ◽  
Control Systems ◽  
Internal Control ◽  
Control Environment ◽  
Unit Manager ◽  
Internal Control System ◽  
Standard Operating ◽  
Information And Communication ◽  
Qualitative Descriptive

PT. Pegadaian (Persero) provides loans to people with require collateral item as insurance. PT. Pegadaian have to keep the collateral save and maintain it secure, so that internal control for collateral items are necessary needed. The purpose of this research was to determine and evaluate the implementation of the internal control systems for receiving, returns, and auctions of collateral items at PT. Pegadaian (Persero). The method used is qualitative descriptive with five components of COSO to evaluate the effectivities of internal control that applied at PT. Pegadaian (Persero). The five components of the COSO internal control is the control environment, risk assessment, control activities, information and communication and monitoring. The results showed that internal control systems at PT. Pegadaian (Persero) have been support by Standard Operating Procedures for all operations and filed documents. But from the evaluation for internal control system of receiving, returns, and auctions of collateral items there are still task stacking at unit manager make internal control systems PT. Pegadaian (persero) still have lack of control.Keywords: Internal Control Systems, Collateral Item, COSO.

Reconstruction of Hydrostatic Drive and Control System Dedicated for Small Mobile Platform

2014 ◽  
Author(s):  
Artur Guzowski ◽  
Andrzej Sobczyk
Keyword(s):  
Control System ◽  
Control Systems ◽  
Hydraulic System ◽  
Mobile Platform ◽  
Hydraulic Control ◽  
Drive And Control ◽  
And Control

The paper presents modification of drive and control system for specially developed small size multipurpose mobile platform which has been built based on existing vehicle undercarriage. For such redesigned object new concept of hydrostatic drive and control system is proposed. The control system consists of selected hydraulic components and controllers which were chosen from Sauer-Danfoss PLUS+1 package which is the system dedicated for mobile hydraulic control systems application. The hydraulic system has been equipped with extra valves, enabling to obtain of assumed functions.

scholarly journals INTERNAL CONTROL SYSTEMS AND ITS RELATIONSHIPS WITH THE FINANCIAL PERFORMANCE IN TELECOMMUNICATION COMPANIES “A CASE STUDY OF ASIACELL”

2018 ◽  
Author(s):  
Amanj Mohamed Ahmed ◽  
Akram Ahmed Muhammed
Keyword(s):  
Risk Assessment ◽  
Control System ◽  
Financial Performance ◽  
Control Systems ◽  
Internal Control ◽  
Internal Controls ◽  
Control Environment ◽  
Independent Variables ◽  
Internal Control System ◽  
Information And Communication

The overall objective of this study was to establish the effects of internal controls on the financial performance of Asiacell as a telecommunication company in Kurdistan Region of Iraq. This was achieved by looking at the effect of control environment, risk assessment, information and communication, control activities and monitoring on the return on asset of the selected company. The study used both primary and secondary techniques to collect the data. In the model, the dependent variable is financial performance while the independent variables are the components of internal controls. After analyzing the audited financial statements and filling the questioners by the employees of the selected company, the findings of the study showed that there is a significant relationship between internal controls and financial performance. The dependent and the independent variables in the study indicated a relationship with control environment, risk assessment. Information and communication and control activities illustrated a positive relationship with the financial performance while monitoring showed a negative relationship with financial performance. The study also found that, Asiacell had invested on effective internal control systems, thus, it had a better financial performance as compared to the related firms that had a weak internal control system. The study further recommends that the governing body, possibly supported by the audit committee, should ensure that the internal control system is periodically monitored and evaluated by the respective managers.

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