The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents a modular fuzzy logic control structure with spiral dynamic algorithms (SDAs) and their application in controlling a stair climbing wheelchair specifically in descending task. To ensure smooth and stable stair descending operation using a wheelchair without collapsing or slipping is a very challenging problem. Suitable design and control strategies need to be adopted to achieve...
In this work, a new approach based on spiral dynamic algorithm (SDA) is implemented to optimize the input output of fuzzy scaling factors of a stair ascending operation using a wheelchair. The ascending task is done automatically using interchangeable phases control structure using modular fuzzy logic (IPFL). The value obtained from the SDA optimization is compared with heuristic gain value to access...
This paper presents the development of an improved spiral dynamic optimisation algorithm with application to fuzzy logic dynamic modelling of a twin rotor system. Spiral motion and dynamic step size generated by a spiral model produce unique exploration and exploitation strategies of a spiral dynamic algorithm. However, the algorithm is subject to settling into local optima at the end of the search...
This paper presents a novel adaptive spiral dynamic algorithm for global optimization. Through a spiral model, spiral dynamic algorithm has a balanced exploration and exploitation strategy. Defining suitable value for the radius and displacement in its spiral model may lead the algorithm to converge with high speed. The dynamic step size produced by the model also allows the algorithm to avoid oscillation...
This paper presents three novel hybrid optimization algorithms based on bacterial foraging and spiral dynamics algorithms and their application to modelling of flexible maneuvering systems. Hybrid bacteria-chemotaxis spiral-dynamics algorithm is a combination of chemotaxis strategy in bacterial foraging algorithm and linear adaptive spiral dynamics algorithm. Chemotactic behaviour of bacteria is a...
In this paper; three optimization algorithms are used to optimize the fuzzy control parameters of a novel structure two-wheeled robotic vehicle with a movable payload. The vehicle has five degrees of freedom and able to steer on irregular and inclined surfaces. Hybrid spiral dynamic bacterial chemotaxis (HSDBC), spiral dynamic algorithm (SDA) and bacterial forging algorithm (BFA) optimizations are...
A new configuration of double inverted pendulum (IP) with an extended rod is investigated in this paper. This configuration mimics a wheelchair moving on two wheels and equipped with a mechanism that allows lifting the chair and the user to any predefined height as per the user's need. The double IP system on two wheels is classified as a complex in its own. Having a mechanism for lifting the chair...
Climbing a flight of stairs using a wheelchair is not as simple as balancing it on two wheels. Stairs climbing involves several phases, to ensure stability and safety in an auto-mode system. The subtle design of a stair climbing wheelchair system consists of three main actuators; a pair of motors, one for acting on each wheel and one for seat position. The operation of the system is based on the wheel...
This paper presents a hybrid optimization algorithm referred to as Hybrid spiral dynamics bacterial foraging (HSDBF). The algorithm synergizes spiral adaptive simplified bacterial foraging algorithm (BFA) and spiral dynamics inspired optimization algorithm (SDA). The standard BFA has better exploitation strategy while SDA has superior exploration approach and stable convergence when approaching the...
This paper presents a hybrid optimization algorithm, referred to as hybrid spiral dynamics bacterial chemotaxis (HSDBC) algorithm. HSDBC synergizes bacterial foraging algorithm (BFA) chemotaxis strategy and spiral dynamics algorithm (SDA). The original BFA has higher convergence speed while SDA has better accuracy and stable convergence when approaching the optimum value. This hybrid approach preserves...
This paper presents adaptive versions of spiral dynamics algorithm (SDA) referred to as adaptive SDA (ASDA). SDA is known as fast computing algorithm due to its simplicity in the structure and it has stable convergence response when approaching the optimum point in the search space. However, the performance of SDA is still poor due to incorporation of single radius value during the whole search process...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.