Nearly constant acceleration model for state estimation in the range‐Doppler plane

<p>The estimation of the Coronal Mass Ejection (CME) arrival is an open issue in the field of Space Weather. Many models have been developed to predict Time-of-Arrival (ToA). In this work, we utilize an updated version of the Effective Acceleration Model (EAM) to calculate the ToA. The EAM predicts the ToA of the CME-driven shock and the sheath's average speed at 1 AU. The model assumes that the interaction between the ambient solar wind and the interplanetary CME (ICME) results in constant acceleration or deceleration. We recently compared EAM against ENLIL and drag based models (DBEM) with a sample of 16 CMEs. We confirmed the well-known fact that the deceleration of fast ICMEs in the interplanetary medium is not captured by most models. We study further the deceleration of fast ICMEs by introducing, for the first time, wide-angle observations by the STEREO heliospheric imagers into the EAM model. The speed profiles for some test cases show deceleration in the interplanetary medium at greater distances compared with the field-of-view of the coronagraphs.</p>

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State Estimation of Spiralling Target with UKF with Generalized Sinusoidal Target Acceleration Model

AIAA Guidance, Navigation, and Control Conference ◽

10.2514/6.2012-4891 ◽

2012 ◽

Author(s):

P. Dwivedi ◽

P. Bhale ◽

A. Bhattacharyya ◽

R. Padhi

Keyword(s):

State Estimation ◽

Target Acceleration ◽

Acceleration Model

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Research on the Motion Model of Flying Plate in Explosive Welding

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.108-111.1152 ◽

2010 ◽

Vol 108-111 ◽

pp. 1152-1157

Author(s):

Ming Lu ◽

Liu Peng ◽

Ling Li ◽

Xin Wei Ji

Keyword(s):

Explosive Welding ◽

Maximum Speed ◽

Metallic Materials ◽

Motion Model ◽

Experiment Data ◽

Constant Acceleration ◽

Acceleration Model ◽

Calculated Curve ◽

The Relationship ◽

Good Agreement

Constant variably acceleration motion model of flying plate is proposed and the model formula about the relationship between speed of flying plate and clearance is put forward, which provides theorotical basis for choosing optimum clearance by collision speed of different metallic materials in explosive welding industry production. High pressure impulse X radial photograph experiment was carried out, the photos of the flying stances of flying plate in different clearances were obtained and the corresponding flying speeds of flying plate were calculated. Curve fitting of the experiment data through constant variably acceleration motion model was carried out. The results show that constant variably acceleration motion model accords well with the experiment data，and the maximum speed of flying plate calculated through constant acceleration model is in good agreement with the values through theoretical calculation. Therefore, it is concluded that the motion of flying plate in the main follows the constant variably acceleration motion.

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