Wheel slip control based on composite nonlinear feedback

To produce faster vehicle acceleration and avoid wheelspin on slippery roads, the wheel slip must be controlled to achieve maximum traction. Recent researches in slip control always had to compromise between speed of time response and overshooting. This research studies the application of Composite Nonlinear Feedback (CNF) controller for vehicle wheel slip control, particularly for in-wheel electric vehicle. A strategy for applying the CNF controller which involves feedback linearization is proposed. The CNF is a combination of a linear feedback law and a nonlinear feedback law without any switching element. The CNF control focuses on improving the transient performance. The proposed control strategy is validated by simulation

Developing visitors' perception indicators on natural resource conservation in Tasik Kenyir, Malaysia

The purpose of this paper is to develop scale to measure the indicators of the visitors’ perception on natural resources conservation for ecotourism development in Tasik Kenyir, Malaysia. Constructed questionnaires were distributed to visitors in Tasik Kenyir who were selected using the convenience sampling method which is a non-probability sampling technique. The data collection method used in this study was the face-to-face interview. Descriptive analysis was used to describe the socio-demographic profiles of the respondents in this study, while factor analysis was used to develop the scale for the visitors’ perception on natural resource conservation. Results obtained in this study indicate that 24 variables have significant contribution in determining the perception on the indicators of natural resource conservation and are distributed into nine factors. These findings can be used undertaking the conservation of natural resource for the development of ecotourism