Controlling quarter car suspension system by proportional derivative and positive position feedback controllers with time delay

Stability of state-proportional integral derivative (PID) feedback control system with time delay

This article proposes a method to compute the maximum allowable delay time (  ) for linear-timeinvariant-time-delayed-systems (LTI-TDS) with state-PID feedback control. It presents the main theorem with corollary, and computing steps to obtain .  Stability of a LTI-TDS with stateproportional integral derivative (PID) feedback is ensured if the delay time is less than .  The proposed approach...

Fuzzy Control of a Quarter-Car Suspension System

An active suspension system has been proposed to improve the ride comfort. A quarter-car 2 degree-of-freedom (DOF) system is designed and constructed on the basis of the concept of a four-wheel independent suspension to simulate the actions of an active vehicle suspension system. The purpose of a suspension system is to support the vehicle body and increase ride comfort. The aim of the work des...

A unified approach to the design of advanced proportional-integral-derivative controllers for time-delay processes

−A unified approach for the design of proportional-integral-derivative (PID) controllers cascaded with firstorder lead-lag filters is proposed for various time-delay processes. The proposed controller’s tuning rules are directly derived using the Padé approximation on the basis of internal model control (IMC) for enhanced stability against disturbances. A two-degrees-of-freedom (2DOF) control s...

Dynamic Response of 2 Dof Quarter Car Passive Suspension System (qc-pss) and 2 Dof Quarter Car Electrohydraulic Active Suspension System (qc-eh-ass)

Controlling low - dimensional chaos by proportional feedback

Low-dimensional chaos can be controlled by proportional feedback to one or more of the system constraints in a simple scheme based on 1D maps. The stabilized system exhibits periodic behavior even though the corresponding autonomous system remains within the parameter range of chaotic behavior. We examine the effects of random noise and delay between sampling and subsequent control perturbation...