Design of auto-stabilization control technique for a quadrotor system

This paper presents the design of auto-stabilization control technique for a quadrotor system. Aquadrotor is a highly nonlinear and has to be stabilized by a suitable control technique. Therefore, the main focus of this research is to design an appropriate control algorithm that able to auto-stabilize the quadrotor at hover. The dynamic modeling of the quadrotor is described by sets of equations of motion that are derived based on the Newton-Euler formalism with the implementation of UKF for parameter identification and state estimation. The control strategy adopted includes feedback linearization coupled with Proportional-Derivative (PD) controller for the translational subsystem and backstepping based Proportional-Integral-Derivative (PID) controller for the rotational subsystem. It is developed in MATLAB/Simulink platform and is validated via real-time implementation. Both controllers give satisfactory simulation results, where acceptable peak of overshoot and small steady state errors are achieved. Experimentally, the throttle is controlled in manual mode while attitude angles are stabilized automatically. The simulation and experimental results show that the proposed controller is able to effectively stabillized the quadrotor

The effect of values on the perception of sustainable efforts towards event greening

Values are general guides to behaviour from the principles and fundamental convictions which are the standards by which particular good or desirable actions are judged. Every facet of human existence such as health, diet, leisure, quality of life, every day practices; production, consumption, education, research, politics, and societal values are touched by global environmental change. The flourishing of life on earth can be enjoyed when human goods—life, love, liberty, the freedom to pursue a meaningful existence is aligned with the environment around us. Efforts to save the planet remains to be seen from a societal paradigm shift that is taking place. However, it cannot be determined whether the transformation is comprehensive or fast enough. A socially shared cognitive-normative framework in values, norms, beliefs, and strategies typically entails new principles of social organization in the paradigm shift. A significant impact on everyday thinking and practices in substantial parts of the world is a result from sustainability ideas, norms, and values that permeate an ever-increasing part of modern life. This is occurring not only in developed countries but also in developing ones such as Malaysia. The emerging sustainability paradigm is being established by a process of multiple initiatives facilitated by collective learning of new values, ideas, and practices through associations, communities, business, and political networks. There are not only values and beliefs shifting, some reordering of priorities such as governance reforms and innovations, and changes in many daily practices as well. The higher values indicate greater image transfer on the state of the environment. As such, higher values indicate stronger intentions towards environmental issues. The aim of this study is the attendees’ perception on efforts from event organizers to implement sustainable practices in event management and to explore event attendees’ perception of sustainable efforts towards event greening. The focus of this research is to investigate the relationships between the proposed psychological components of values and the influences on perception of attendees on sustainable efforts towards event greening

Theorizing event attendees behavior to increase the demand for sustainable events

Efforts to include sustainable elements to produce green events are deemed critical in recent development of the event management field. However, there are challenges to plan and implement an event that depicts the essential elements that could be characterized as a green event. Basically, the idea of an event with sustainable elementsneed to integrate the three most important concerns regarding the environment, economic and social issues in the process of creating the event. The attendees of event must be educated and nurtured on the importance of having a green event. In the education process of the human element, it is fundamental to look at two important aspects of behavior and belief of individuals, their perception and attitude towards the concept of a green event. Therefore, this study used Theory of Planned Behavior (TPB) in theorizing and developing a new model so as to understand the antecedents that focuses on the behavior of attendees. This model is unique in a sense that it represents the new dimensions of awareness both from the perspective of ecological and environmental which will result in and understanding of the individual behavior and their perception towards sustainable events. As a result of this research, effective strategies could be developed, training and seminars designed to educate the attendees so that this could influence their behavior to positively support events with green credentials. This could also be a contribution to the government in fulfilling the objectiveof the National Key Economic Areas (NKEAs) to create more green events using sustainability issues as an attraction in event tourism. The main objective of this study is to identify the attendees' behavior towards green events to determine the demand for sustainable events. The methodology used is a combination of quantitative and qualitative measures. The findings of this research will help to discover extensive event management knowledge with the key result area of application in sustainability and green technology initiatives

Comprehensive review on controller for leader-follower robotic system

This paper presents a comprehensive review of the leader-follower robotics system. The aim of this paper is to find and elaborate on the current trends in the swarm robotic system, leader-follower, and multi-agent system. Another part of this review will focus on finding the trend of controller utilized by previous researchers in the leader-follower system. The controller that is commonly applied by the researchers is mostly adaptive and non-linear controllers. The paper also explores the subject of study or system used during the research which normally employs multi-robot, multi-agent, space flying, reconfigurable system, multi-legs system or unmanned system. Another aspect of this paper concentrates on the topology employed by the researchers when they conducted simulation or experimental studies