Fuzzy logic controller for half car active suspension system

This work presents the MATLAB/Simulink simulation results of half car active suspension system controlled by the fuzzy logic controller. The half car model consists of one front and rear wheel. Firstly, a mathematical model of the suspension system is developed. Based on the developed mathematical model, the fuzzy logic controller for the system is designed. The input to the controller is the vertical displacement and velocity of the front body of the vehicle. The membership function of these two variables is adjusted accordingly so that the output, i.e., the car body acceleration, the deflection of the wheels and other output are better than that of the passive suspension system. The results clearly show that all of the active suspension system output has improved when compared to that of the passive system

Company--community partnership outgrower schemes in forestry plantations in Indonesia: an alternative to conventional rehabilitation programmes

Indonesia has a considerable area of degraded land requiring rehabilitation. However, most rehabilitation projects in the past have been government driven, depending on public funding (ndonesian government and international donors), and have focused mainly on technical aspects. As a result people living in surrounding targeted areas are not adopting rehabilitation techniques. Innovative approcahes are necessary if the objectives of a rehabilitation programme are to be met while providing benefits to private companies and local people. The findings of a study of outgrower schemes in Indonesian timber plantations suggested that company--community partnerships could be an alternative for implementing rehabilitation programmes. The partnership arrangement over a 10- to 45- year period is based on a contract. It states the rights and duties of each party in establishing a forestry plantation and the benefit-sharing agreement at the time of harvest. The schemes take place on logged-over forests and idle lands, mostly Imperata grasslands. The partnership provides opportunities for forestry plantation companies to play a social role and rehabilitate degraded resources. It also provides job opportunities to local people and incomes from harvested timber at the end of each rotation under a long-term contract