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A bearingless permanent magnet-type synchronous motor (PMSM) is a strong-coupled complicated nonlinear system, establishing exact mathematical models of electromagnetic torque and radial suspension forces is a precondition for designing control system of the bearingless PMSM. The inductance matrix of the bearingless PMSM is given after analyzing the magnetic flux linkage intersection between torque...
The main objective of designed the controller for a vehicle suspension system is to reduce the discomfort sensed by passengers which arises from road roughness and to increase the ride handling associated with the pitching and rolling movements. This necessitates a very fast and accurate controller to meet as much control objectives, as possible. Therefore, this paper deals with an artificial intelligence...
This paper proposes anti-lock braking system to integrate with active suspensions system applied in a quarter vehicles model, and can use a road estimate to get the road condition. This estimate is based on the LuGre friction model with a road condition parameter, and can transmit a reference slip ration to slip ratio controller through a mapping function considering the effect of road characteristics...
This paper presents an approach for design and control of a new servo valve which has variety of applications such as in vehicle active suspension system. The new setup which is referred to as Nitinol-hydraulic actuator consists of a smart spool rod covered by smart materials for operating position assigning of inlet and outlet ports. Inter-metallic compound of Nitinol (Ni-Ti) is used for actuator...
In this paper we present one of the concepts of vehicle seat vibration damping, using a fuzzy controller. We used a fuzzy controller as a part of a semi-active vehicle suspension system, which consists of semi-active air spring and semi-active damper. System is implemented between the cabin floor and vehicle seat. Fuzzy controller is designed to adjust the stiffness of the air spring and damping of...
This paper deals with design and visualization of H-infin robust controller. It gives a brief mathematical description of physical model of suspension system of a car which was chosen as a typical example of robust control use. Therefore, first a quarter car model is introduced. Then comes the main part of solution of this problem, that is detailed design of the controller. Finally, based on real...
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