On the zeros of three-DoF damped flexible systems

Rath, Siddharth; Awtar, Shorya

doi:10.1016/j.jsv.2023.117698

Journal of Sound and Vibration

2023

DOI: 10.1016/j.jsv.2023.117698

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On the zeros of three-DoF damped flexible systems

Siddharth Rath

Shorya Awtar

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2024

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Improving the Step Response of Flexible Systems in the Presence of Real Nonminimum Phase Zeros

Rath,

Radgolchin,

Awtar

2024

ASME Letters in Dynamic Systems and Control

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It is well-known that real non-minimum phase (RNMP) zeros impose a tradeoff between the settling time and undershoot in the step response of flexible systems. Existing methods to alleviate this tradeoff predominantly rely on various advanced control strategies without delving into a broader mechatronic approach that combines physical system and control system design. To address this gap, this paper proposes a proportional viscous damping-based physical system design in combination with feedback control and prefilter design. First, the effect of proportional viscous damping on RNMP zeros of flexible systems is established to propose a damping strategy that pushes all the RNMP zeros further away from the imaginary axis. Then, a step-by-step mechatronic system design process is presented to apply this damping strategy along with full state feedback control strategy and prefilter to a multi-DoF flexible system. The application of this design process yields simultaneous improvement in the settling time and undershoot in the step response of this flexible system.

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Improving the Step Response of Flexible Systems in the Presence of Real Nonminimum Phase Zeros

Rath,

Radgolchin,

Awtar

2024

ASME Letters in Dynamic Systems and Control

View full text Add to dashboard Cite

show abstract

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On the zeros of three-DoF damped flexible systems

Cited by 1 publication

References 40 publications

Improving the Step Response of Flexible Systems in the Presence of Real Nonminimum Phase Zeros

Improving the Step Response of Flexible Systems in the Presence of Real Nonminimum Phase Zeros

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