Frequency-Modulated Pulse-Jet Control of an Artillery Rocket

2012 ◽  
Vol 49 (2) ◽  
pp. 286-294 ◽  
Author(s):  
Bojan Pavkovic ◽  
Milos Pavic ◽  
Danilo Cuk
Keyword(s):  
Jet Control ◽  
Pulse Jet

Short wide angle diffuser with pulse jet control

1999 ◽  
Author(s):  
S. Raghunathan ◽  
J. Watterson ◽  
R. Cooper ◽  
S. Lee
Keyword(s):  
Wide Angle ◽  
Jet Control ◽  
Pulse Jet

Pulse-frequency modulated guidance laws for a mortar missile with a pulse jet control mechanism

2015 ◽  
Vol 119 (1213) ◽  
pp. 389-405 ◽  
Author(s):  
M. Pavic ◽  
B. Pavkovic ◽  
S. Mandic ◽  
S. Zivkovic ◽  
D. Cuk
Keyword(s):  
Sliding Mode ◽  
Design Parameters ◽  
Proportional Navigation ◽  
Adaptive Sliding Mode ◽  
Jet Control ◽  
Control Authority ◽  
The Individual ◽  
Miss Distance ◽  
Guidance Laws ◽  
Pulse Jet

AbstractThe impact point dispersion of mortar missiles can be drastically reduced with a control ring of lateral pulse jets located around the centre of gravity and a homing head to measure or to derive estimates of appropriate missile-target states, e.g. the line-of-sight rates. A simulation model including a missile as a six-degree-of-freedom vehicle, a jet pulse flight control system, and a relative missile-to-target motion was used for the comparison of four guidance laws i.e. proportional navigation guidance, augmented proportional navigation, augmented proportional navigation with rendezvous, and adaptive sliding-mode guidance. This paper focuses on the efficiency of pulse jet control on miss distance, and thus makes the assumption that sensor measurements and the guidance states required to apply each of the guidance laws are perfectly known. Proportional navigation and the adaptive sliding mode guidance exhibit a large miss distance due to limited control authority. Augmented proportional navigation is slightly better than augmented proportional navigation with rendezvous for the same design parameters and they both give small miss distances with limited control authority, but they both require a free gyro. A proper selection of the design parameters — the number of pulse jets and the magnitude of the individual pulse jet thrust for a particular dispersion of flight parameters and the instant of the guidance start — is required to achieve optimum dispersion reduction. The minimum intensity of the individual pulse jet impulse required for the ‘pin point’ accuracy (the circular error probable smaller than 1m) of the mortar missile was determined for all presented guidance laws considering dispersion from the nominal trajectory.

Intelligent Optimal Pulse-Jet Control for Dual-Spin Projectiles

2021 ◽  
Author(s):  
Zhen Yang ◽  
Jian Fu ◽  
Liangming Wang ◽  
Zhi Chen
Keyword(s):  
Jet Control ◽  
Pulse Jet

Model Predictive Lateral Pulse Jet Control of an Atmospheric Rocket

2002 ◽  
Vol 25 (5) ◽  
pp. 860-867 ◽  
Author(s):  
Bradley Burchett ◽  
Mark Costello
Keyword(s):  
Jet Control ◽  
Lateral Pulse Jet ◽  
Pulse Jet

Investigation of the different particle size dust releases from rigid filter candles during pulse-jet cleaning

2021 ◽  
pp. 095440622110179
Author(s):  
Xin Luan ◽  
Zhongli Ji ◽  
Longfei Liu ◽  
Ruifeng Wang
Keyword(s):  
Particle Size ◽  
Critical Role ◽  
Operating Conditions ◽  
Solid Particles ◽  
Dust Particles ◽  
Cleaning Efficiency ◽  
Term Operation ◽  
Cleaning Performance ◽  
Experimental Apparatus ◽  
Pulse Jet

Rigid filters made of ceramic or metal are widely used to remove solid particles from hot gases at temperature above 260 °C in the petrochemical and coal industries. Pulse-jet cleaning of fine dust from rigid filter candles plays a critical role in the long-term operation of these filters. In this study, an experimental apparatus was fabricated to investigate the behavior of a 2050 mm filter candle, which included monitoring the variation of pressure dynamic characteristics over time and observing the release of dust layers that allowed an analysis of the cleaning performance of ISO 12103-1 test dusts with different particle size distributions. These results showed the release behavior of these dusts could be divided into five stages: radial expansion, axial crack, flaky release, irregular disruption and secondary deposition. The cleaning performance of smaller sized dust particles was less efficient as compared with larger sized dust particles under the same operating conditions primarily because large, flaky-shaped dust aggregates formed during the first three stages were easily broken into smaller, dispersed fragments during irregular disruption that forced more particles back to the filter surface during secondary deposition. Also, a “low-pressure and long-pulse width” cleaning method improved the cleaning efficiency of the A1 ultrafine test dust from 81.4% to 95.9%.

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