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ITS » Scientific Articles » Luar ITS
Posted by unggul@me.its.ac.id at 10/12/2014 02:42:20  •  797 Views


OVERRIDE AND ANTI-WINDUP CONTROL STRATEGY FOR ACTIVE VEHICLE SUSPENSION SYSTEM

Author :
WASIWITONO, UNGGUL ( 197805102001121001 )
I NYOMAN SUTANTRA   HENDROWATI, WIWIEK; SULTONI, ARIF INDRO




ABSTRAK

Vehicle suspension plays important roles in vehicle performance. The main function of the vehicle suspension is to improve ride and handling performance. The other important requirements need to be considered in the controller design are suspension def ection and actuator saturation. However these requirements are conf icting. For example to obtain better ride comfort it is usually required larger control input and larger suspension def ection but the actuator that deliver the control signal have a limitation which is commonly known as actuator saturation. There is also a structural constraint that limits the suspension def ection. Most of the vehicle active suspension control strategies deal with actuator saturation and limitation of suspension def ection by keeping the control signals small until the point where constraint is not met at all. The advantage of this approach is allowing one to use the unconstrained design methods and hence a linear analysis of the problem can be carried out. However this is achieved at the cost of reducing achievable performance since we expect high performance to be associated with acting on or near constraints. In this study an alternative approach to the vehicle active suspension system is studied. In this approach some separation in the controller such that one part is devoted to achieve nominal performance and the other part is devoted to constraint handling is performed. This control strategy involves a two-step design procedure. Namely a state feedback controller is first synthesized for a linear system ignoring saturation and state constraint. Then the anti-windup and override compensator is designed such that when saturation occurs or state constraints limits is exceeded this compensator becomes active to recovers as much as possible the performance lost. Local control design technique based on the circle criterion and L2 gain performance is used for the anti-windup and override compensator synthesis. A quarter car model is considered in this study and the effectiveness of the proposed approach is shown by a numerical example. The application of the override control for active vehicle suspension system is studied. It is shown that the occurrence of the suspension hits it def ection limits and control input reaches the saturation bound can be minimized by override and anti windup control strategy.



KeywordsFeedback Control; Override Control; Anti-Windup Control; Active Vehicle Suspension; Saturation
 
Subject:  sistem suspensi
Date Create: 17/10/2012
Type: Text
Format: PDF
Language: English
Identifier: ITS-Article-99015140000125
Collection ID: 99015140000125
Call Number: 629.243 Was o


Source
article of Proceeding Seminar Nasional Tahunan Teknik Mesin XI (SNTTM XI) & Thermofluid IV Universitas Gadjah Mada (UGM), Yogyakarta, 16-17 Oktober 2012

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Proceeding Seminar Nasional Tahunan Teknik Mesin XI (SNTTM XI) & Thermofluid IV Universitas Gadjah Mada (UGM), Yogyakarta, 16-17 Oktober 2012




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ITS-Article-99015140000125-34598.pdf




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