Investigation of Dynamic Rocket Thrust Measurement Techniques

Crosswy, F L; Kalb, Howie

doi:10.21236/ad0823181

Cited by 4 publications

(4 citation statements)

References 3 publications

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“…DYNAMIC THRUST MEASUREMENT Dynamic thrust measuring system is usually simplified to an ideal second order spring-damper system, and the model is as follows [2,3] :…”

Section: Typical Way Of Dynamic Compensation Inmentioning

confidence: 99%

“…Dynamic compensation can be realized by adding a compensation part [3,9] G 2 (S) in series to the original system, and then the overall transfer function of the serial system is as follows, given…”

Section: Typical Way Of Dynamic Compensation Inmentioning

confidence: 99%

“…The thrust signal of liquid rocket engine is commonly present in the form of trapezoid wave [3] . Therefore the trapezoid wave signal, of which the rise and descending time are both 10 ms, and step signal are used as the engine's input in simulations by MATLAB.…”

Section: Simulationsmentioning

confidence: 99%

“…Typical methods of dynamic thrust measurement usually need to compensate the outputs of measurement. The Reaction Force Summation Technique [3] and the Inverse Transfer Function Technique [3~5] were adopted extensively. The essence of these two, which play very important role in dynamic thrust measurement, is to combine the analog signals and design the analog filter.…”

Section: Introductionmentioning

confidence: 99%

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Digital compensators for dynamic thrust measurement

Chen

Wang

et al. 2010

Ieee Icca 2010

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The model of dynamic thrust measurement and typical methods for compensation are presented. Traditional analog compensator's disadvantages consist of being dependent on components, and simply bilinear transformation would cause distortion. Several direct digital compensators, including direct inverse, deadbeat, two-beat-delay and non-deadbeat digital compensators, are compared, designed and novelly proposed in dynamic thrust measuring system. Analysis and experimental results demonstrate that the deadbeat and two-beat-delay digital compensators are the specific cases of the non-deadbeat digital compensator, and the latter one is superior in restraint on noise and disturbance. The processed results of actual data illustrate that non-dead-beat compensator can restrain overshoots and noises.

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“…DYNAMIC THRUST MEASUREMENT Dynamic thrust measuring system is usually simplified to an ideal second order spring-damper system, and the model is as follows [2,3] :…”

Section: Typical Way Of Dynamic Compensation Inmentioning

confidence: 99%

Section: Typical Way Of Dynamic Compensation Inmentioning

confidence: 99%

Section: Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Digital compensators for dynamic thrust measurement

Chen

Wang

et al. 2010

Ieee Icca 2010

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Elimination of Stray Forces from Tire Dynamics Measurements or Beware the Backpath

Potts¹

2021

Tire Science and Technology

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The forces that enter the mounted tire spindle of laboratory-type tire dynamics test machines include the following items: (1) direct tire-generated forces, tire nonuniformities, and tread pattern vibrations; (2) direct tire-transmitted rough road surface or cleat impact forces; (3) direct machine resonance-amplified versions of items 1 and 2; (4) machine frame backpath-transmitted versions of items 1–3; (5) dynamic loadcell crosstalk; (6) external noise from foundation vibrations; and (7) adjacent load station vibrations traveling through the machine frame. Although items 1 and 2 are sought in spindle vibration measurements, items 3–7 are also included in the mix and confound the measurement, confusing the analyst into thinking that machine properties are tire properties. Not only do items 3–6 not exist in vehicle operation but also comparison of results from one test machine to another can be an exercise in comparing machine to machine, not tire to tire. Tire dynamics measurements should simulate tires in roadway operation, not create a whole new set of problems that do not exist in vehicles. Elimination of item 7 paved the way to developing a tire failure warning system that operates on tire endurance test machines and can be adapted for operation on passenger vehicles to warn the driver of tire trouble. This article develops the theory of stray force measurement, describes a method for eliminating stray forces from experimental tire dynamics data, and provides experimental verification of the effectiveness of these methods.

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Thrust Measuring System for Electrothermal Thrusters

Barber¹

1974

Journal of Spacecraft and Rockets

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Investigation of Dynamic Rocket Thrust Measurement Techniques

Abstract: subject to'spicial expoft\controls I to foreign goyernmetfts orVoretgn de/only with pripr approval of evelopmenkj&enter (ABfS), orce'Cttfion, Tennessee.

Cited by 4 publications

References 3 publications

Digital compensators for dynamic thrust measurement

Digital compensators for dynamic thrust measurement

Elimination of Stray Forces from Tire Dynamics Measurements or Beware the Backpath

Thrust Measuring System for Electrothermal Thrusters

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