Design of Reaction Jet Attitude Control Systems for Flexible Spacecraft

Bittner, H.; Fischer, H.D.; Surauer, M.

doi:10.1016/s1474-6670(17)62222-5

Cited by 10 publications

(3 citation statements)

References 1 publication

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“…In this paper, an effective method of reducing energy consumption in driving SMA actuators by using Pulse-Width Pulse-Frequency (PWPF) modulation is proposed. Though there are other type of modulators, such as psuedorate modulator (Millar and Vigneron, 1976) and integral-pulse frequency modulator (Clark and Franklin, 1969;Hablani, 1994), the PWPF modulator (Bittner et al, 1982;Wie and Plescia, 1984;Anthony et al, 1990;Song et al, 1999) holds several superior advantages such as close to linear operation, high accuracy, adjustable pulse-width and pulse-frequency, and fuel efficiency when applied to thruster systems for spacecraft. Pulse-width modulation for controlling SMAs has been reported (Honma et al, 1984;Kato et al, 1999), however, controlling SMAs using PWPF modulator is not found in the literature.…”

Section: Introductionmentioning

confidence: 99%

Control of Shape Memory Alloy Actuators Using Pulse-Width Pulse-Frequency (PWPF) Modulation

Song

2003

Journal of Intelligent Material Systems and Structures

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This paper presents the design and experimental results of control of a Shape Memory Alloy (SMA) actuator using Pulse-Width Pulse-Frequency (PWPF) modulation to reduce the energy consumption of the SMA actuator. An SMA wire test stand is used in this research. Based on results of open-loop testing of the SMA wire actuator and parameter analysis of the PWPF modulator, a PWPF modulator is designed to modulate a Proportional plus Derivative (PD) controller. Experiments demonstrate that control of the SMA actuator using PWPF modulation effectively save actuation energy while maintaining same control accuracy as compared to continuous PD control.

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Section: Introductionmentioning

confidence: 99%

Control of Shape Memory Alloy Actuators Using Pulse-Width Pulse-Frequency (PWPF) Modulation

Song

2003

Journal of Intelligent Material Systems and Structures

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“…In general, pulse modulators produce a pulse command sequence to the thruster valves by adjusting pulse width andor pulse frequency. Pulse modulators such as pseudo-rate modulator (Millar and Vigneron, 1976), integral-pulse frequency modulator (Clark and Franklin, 1969;Hablani, 1994), and Pulse-Width and Pulse-Frequency (PWPF) modulator (Bittner, 1982;Wie and Plescia, 1984;Anthony et al, 1990;Song, et al, 1998a) have been proposed. Among these, the PWPF modulator holds several superior advantages such as close to linear operation, high accuracy and adjustable pulse-width and pulsefrequency that provide scope for advanced control.…”

Section: Introductionmentioning

confidence: 99%

Vibration reduction for flexible spacecraft attitude control using PWPF modulator and smart structures

Song

Agrawal

1999

1999 IEEE Aerospace Conference. Proceedings (Cat. No.99TH8403)

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“…In general, pulse modulators produce a pulse command sequence to the thruster valves by adjusting pulse width and/or pulse frequency. Pulse modulators such as psuedorate modulator (Millar and Vigneron, 1976), integral-pulse frequency modulator (Clark and Franklin, 1969;Hablani, 1994), and Pulse-Width and Pulse-Frequency (PWPF) modulator (Bittner, 1982;Wie and Plescia, 1984;Anthony et al, 1990) have been proposed. Among these, the PWPF modulator holds several superior advantages such as close to linear operation, high accuracy and adjustable pulse-width and pulsefrequency which provide scope for advanced control.…”

Section: Introductionmentioning

confidence: 99%

Spacecraft vibration reduction using pulse-width pulse-frequency modulated input shaper

Song

Buck

Agrawal

1997

Guidance, Navigation, and Control Conference

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Minimizing vibrations of a flexible spacecraft actuated by on-off thrusters is a challenging task. This paper presents the first study of Pulse-Width PulseFrequency (PWPF) modulated thruster control using command input shaping. Input shaping is a technique which uses shaped command to ensure zero residual vibration of a flexible structure. PWPF modulation is a control method which provides pseudo-linear operation for an on-off thruster. The proposed method takes full advantage of the pseudo-linear property of a PWPF modulator and integrates it with a command shaper to minimize the vibration of a flexible spacecraft induced by on-off thruster firing. Compared to other methods, this new approach has numerous advantages: 1) effectiveness in vibration suppression, 2) dependence only on modal frequency and damping, 3) robustness to variations in modal frequency and damping, 4) easy computation and 5) simple implementation. Numerical simulations performed on an eight-mode model of the Flexible Spacecraft Simulator (FSS) in the Spacecraft Research and Design Center (SRDC) at US Naval Postgraduate School (NPS) demonstrate the efficacy and robustness of the method.

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Design of Reaction Jet Attitude Control Systems for Flexible Spacecraft

Cited by 10 publications

References 1 publication

Control of Shape Memory Alloy Actuators Using Pulse-Width Pulse-Frequency (PWPF) Modulation

Control of Shape Memory Alloy Actuators Using Pulse-Width Pulse-Frequency (PWPF) Modulation

Vibration reduction for flexible spacecraft attitude control using PWPF modulator and smart structures

Spacecraft vibration reduction using pulse-width pulse-frequency modulated input shaper

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