Concurrent Feed-forward/Feed-back Design for Flexible Structures

Muenchhof, Marco; Singh, Tarunraj

doi:10.2514/6.2002-4941

Cited by 6 publications

(7 citation statements)

References 14 publications

(6 reference statements)

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“…Various improvements and applications of input shaping have been reported [14,15]. The input shaping technique has also been used along with feedback control to optimize the system performance [16][17][18][19][20][21][22][23][24]. In [16][17][18], the concurrent design of the Proportional-Derivative (PD) controller and input shaping was considered.…”

Section: Introductionmentioning

confidence: 99%

“…The PD controller parameters were chosen to fasten the feedback system response, and the input shaping was designed to eliminate the natural vibration frequency of the PD feedback control system. The same idea was deployed in [19] for the combination of input shaping technique and a Linear Quadratic Regulator (LQR) feedback control system. These works only considered the single mode vibration.…”

Section: Introductionmentioning

confidence: 99%

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Settling Time Optimization of a Critically Damped System with Input Shaping for Vibration Suppression Control

Duong

Dao²,

Do³

2022

Eng. Technol. Appl. Sci. Res.

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The input shaping technique is widely used as feedforward control for vibration suppression of flexible dynamic systems. The main disadvantage of the input shaping technique is the increasing system time response since the input shaper contains time delay parts. However, with the same reference input, the actuator effort in the case of using an input shaper is smaller than the one in the case without an input shaper. Thus, it is possible to decrease the system response time by designing the feedback controller to maximize the actuator effort. This paper proposes a design approach to design the Proportional-Derivative (PD) controller for position control of the actuator so that the settling time of the flexible system with input shaper is minimized. The actuator system with a PD controller is equivalent to a critically damped system, and the condition for the controller gains is established. In addition, the settling time and actuator effort with shaped step input are calculated. The controller gains can be determined by solving the settling time optimization problem with the actuator effort constraint. The effectiveness of the proposed approach is verified via experiments with an overhead crane model.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Settling Time Optimization of a Critically Damped System with Input Shaping for Vibration Suppression Control

Duong

Dao²,

Do³

2022

Eng. Technol. Appl. Sci. Res.

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“…The input shapers and the time-delay filters assume that the system being studied is stable. The effect of the feedback controller on the prefilter has recently been studied by Kenison and Singhose [3], Muenchhof and Singh [13], Tenne and Singh [12] etc. Kenison and Singhose [3] study the problem of simultaneous design of a PD controller and an Input shaper for a double integrator.…”

Section: Introductionmentioning

confidence: 99%

“…They conclude that the concurrent design results in better performance compared to a PD controller. Muenchhof and Singh [13] study the problem of simultaneous design of feedback/feedforward controller to minimize the cost function which include the residual energy in the system and a metric which represents the disturbance rejection capability of the closed loop system. The problem is formulated as a minimax controller which minimize the maximum cost over a hypercube of uncertainties.…”

Section: Introductionmentioning

confidence: 99%

Concurrent Feedback/Feedforward Design for Second Order Systems

Gopalakrishnan

Reddy

Singh

2005

AIAA Guidance, Navigation, and Control Conference and Exhibit

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This paper studies the problem of concurrent design of a feedback controller and a pre-filter to minimize a weighted cost comprising the maneuver time and the input power. The pre-filter is parameterized as a time-delay filter motivated by the Posicast controller. The proposed technique is illustrated on a double integrator assuming that the feedback controller is of the proportional derivative form. A closed form expression relating the weighting parameter and the number of delays, to the feedback gains is derived. The proposed technique is also illustrated on spring-mass and springmass-dashpot systems.

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“…The concurrent design is motivated by Muenchhof [11] and its robustness is achieved by minimizing the statistical cost of equation 12. The approximation of the moments of the cost function significantly reduces the computational burden as compared to the "brute-force" minimax approach.…”

Section: Concurrent Controller Designmentioning

confidence: 99%

Robust Feed-Forward/Feedback Design for Tape Transport

Tenne

Singh

2004

AIAA Guidance, Navigation, and Control Conference and Exhibit

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The purview of this paper is the design of controller which include knowledge of parametric uncertainties and their distributions. The parameter distributions are approximated by a finite set of points which are calculated by the unscented transformation. This set of points are used to design robust controllers which minimize the worst performance of the plant over the domain of uncertainty. The proposed technique is illustrated on a tape transport system. Two approaches to arrive at robust prefilters and feedback controllers are proposed. The first which involved sequential design of the feedback and prefilter and the second which simultaneously arrive at optimal parameters of the feedback gain matrix and the time-delay prefilter. Numerical results illustrate desirable response over the operating region of the system.

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Concurrent Feed-forward/Feed-back Design for Flexible Structures

Cited by 6 publications

References 14 publications

Settling Time Optimization of a Critically Damped System with Input Shaping for Vibration Suppression Control

Settling Time Optimization of a Critically Damped System with Input Shaping for Vibration Suppression Control

Concurrent Feedback/Feedforward Design for Second Order Systems

Robust Feed-Forward/Feedback Design for Tape Transport

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