Adaptive Safe Distance Prediction Using MPC for Bridge Cranes Considering Anti-Swing

2020 ◽  
Author(s):  
Huili Chen ◽  
Guoliang Liu ◽  
Guohui Tian ◽  
Jianhua Zhang ◽  
Ze Ji
Keyword(s):  
Safe Distance ◽  
Distance Prediction

scholarly journals Adaptive Safe Distance Prediction Using MPC for Bridge Cranes Considering Anti-Swing in Dynamic Environment

2020 ◽  
Author(s):  
Huili Chen ◽  
Guoliang Liu ◽  
Guohui Tian ◽  
Jianhua Zhang ◽  
Ze Ji
Keyword(s):  
Dynamic Environment ◽  
Prediction Method ◽  
Bridge Crane ◽  
Safe Distance ◽  
Moving Obstacles ◽  
Dangerous Situation ◽  
The Mean ◽  
Prediction Control ◽  
Distance Prediction ◽  
Mean Time

<div>In dynamic environment, the suddenly appeared </div><div>human or other moving obstacles can affect the safety of the </div><div>bridge crane. For such dangerous situation, the bridge crane </div><div>must predict potential collisions between the payload and the </div><div>obstacle, keep safe distance while the swing of the payload must </div><div>be considered in the mean time. Therefore, the safe distance is </div><div>not a constant value, which must be adaptive to the relative </div><div>speed of the bridge crane. However, as far as we know, the </div><div>mathematical model between the safe distance and the relative </div><div>speed of the bridge crane has never been fully discussed. In </div><div>this paper, we propose a safe distance prediction method using </div><div>model prediction control (MPC), which can make sure that the </div><div>crane can stop before the obstacle, and avoid possible collisions, </div><div>while the relative speed and anti-swing are both considered. The </div><div>experimental results prove the effectiveness of our idea.</div>

scholarly journals Adaptive Safe Distance Prediction Using MPC for Bridge Cranes Considering Anti-Swing in Dynamic Environment

2020 ◽  
Author(s):  
Huili Chen ◽  
Guoliang Liu ◽  
Guohui Tian ◽  
Jianhua Zhang ◽  
Ze Ji
Keyword(s):  
Dynamic Environment ◽  
Prediction Method ◽  
Bridge Crane ◽  
Safe Distance ◽  
Moving Obstacles ◽  
Dangerous Situation ◽  
The Mean ◽  
Prediction Control ◽  
Distance Prediction ◽  
Mean Time

<div>In dynamic environment, the suddenly appeared </div><div>human or other moving obstacles can affect the safety of the </div><div>bridge crane. For such dangerous situation, the bridge crane </div><div>must predict potential collisions between the payload and the </div><div>obstacle, keep safe distance while the swing of the payload must </div><div>be considered in the mean time. Therefore, the safe distance is </div><div>not a constant value, which must be adaptive to the relative </div><div>speed of the bridge crane. However, as far as we know, the </div><div>mathematical model between the safe distance and the relative </div><div>speed of the bridge crane has never been fully discussed. In </div><div>this paper, we propose a safe distance prediction method using </div><div>model prediction control (MPC), which can make sure that the </div><div>crane can stop before the obstacle, and avoid possible collisions, </div><div>while the relative speed and anti-swing are both considered. The </div><div>experimental results prove the effectiveness of our idea.</div>

Grandparents Reveal Their Secrets: A New Holocaust Narrative for the Young ‘Third Generation’ in Israel

2012 ◽  
Vol 5 (1) ◽  
pp. 97-110 ◽  
Author(s):  
Yael Darr
Keyword(s):  
Young Children ◽  
First Generation ◽  
Third Generation ◽  
Master Narrative ◽  
Safe Distance ◽  
Domestic Sphere ◽  
Holocaust Memory ◽  
Very Young Children ◽  
The Holocaust ◽  
New Type

Since the 1990s, a new type of Holocaust story has been emerging in Israeli children's literature. This new narrative is directed towards very young children, from preschool to the first years of elementary school, and its official goal is to instil in them an authentic ‘first Holocaust memory’. This essay presents the literary characteristics of this new Holocaust narrative for children and its master narrative. It brings into light a new profile of both writers and readers. The writers were young children during the Holocaust, and first chose to tell their stories from the safe distance of three generations. The readers are their grand-children and their grand-children's peers, who are assigned an essential role as listeners. These generational roles – the roles of a First Generation of writers and of a Third Generation of readers – are intrinsically familial ones. As such, they mark a significant change in the profile of yet another important figure in the Israeli intergenerational Holocaust discourse, the agent of the Holocaust story for children. Due to the new literary initiatives, the task of providing young children with a ‘first Holocaust memory’ is transferred from the educational authority, where it used to reside, to the domestic sphere.

Evaluation and prediction of the safe distance in liquid hydrogen spill accident

2021 ◽  
Vol 146 ◽  
pp. 1-8
Author(s):  
Yuanliang Liu ◽  
Zhan Liu ◽  
Jianjian Wei ◽  
Yuqi Lan ◽  
Shenyin Yang ◽  
...  
Keyword(s):  
Liquid Hydrogen ◽  
Safe Distance

scholarly journals ‘I’m not Sherlock Holmes’: Suspicions, secrecy and silence of transplant professionals in the human organ trade

2019 ◽  
Vol 17 (6) ◽  
pp. 764-783
Author(s):  
Frederike Ambagtsheer ◽  
Linde Van Balen
Keyword(s):  
Qualitative Interview ◽  
Interview Study ◽  
Safe Distance ◽  
Sherlock Holmes ◽  
Human Organ ◽  
Qualitative Interview Study ◽  
Organ Trade ◽  
The Subject

This article presents the results of a qualitative interview study amongst 41 Dutch transplant professionals. The overarching aim was to acquire in-depth understanding of transplant professionals’ experiences with and attitudes towards patients who purchase kidneys. We found that transplant professionals occasionally treat patients who are suspected of kidney purchases abroad. However, they turn a blind eye to their patients’ suspected purchases. Secrecy and silence function as a tacit agreement between patients and their caregivers that keeps the subject of kidney purchase at a safe distance and allows transplant professionals to ignore its suspected occurrence. They thus participate in the building of walls of secrecy and silence in the organ trade.

TNDP: Tensor-based Network Distance Prediction with Confidence Intervals

2021 ◽  
pp. 1-1
Author(s):  
Haojun Huang ◽  
Li Li ◽  
Geyong Min ◽  
Wang Miao ◽  
Yingying Zhu ◽  
...  
Keyword(s):  
Confidence Intervals ◽  
Network Distance ◽  
Distance Prediction

Improved AEB algorithm combined with estimating the adhesion coefficient of road ahead and considering the performance of EHB

2021 ◽  
pp. 095440702110261
Author(s):  
Dequan Zeng ◽  
Zhuoping Yu ◽  
Lu Xiong ◽  
Junqiao Zhao ◽  
Peizhi Zhang ◽  
...  
Keyword(s):  
Joint Probability ◽  
Principal Component ◽  
Test Results ◽  
Safe Distance ◽  
Adhesion Coefficient ◽  
The Road ◽  
Response Characteristics ◽  
Emergency Braking ◽  
Multiple Beams ◽  
Maximum Method

This paper proposes an improved autonomous emergency braking (AEB) algorithm intended for intelligent vehicle. Featuring a combination with the estimation of road adhesion coefficient, the proposed approach takes into account the performance of electronic hydraulic brake. In order for the accurate yet fast estimate of road ahead adhesion coefficient, the expectation maximization framework is applied depending on the reflectivity of ground extracted by multiple beams lidar in four major steps, which are the rough extraction of ground points based on 3 σ criterion, the accurate extraction of ground points through principal component analysis (PCA), the main distribution characteristics of ground as extracted using the expectation maximum method (EM) and the estimation of road adhesion coefficient via joint probability. In order to describe the performance of EHB, the response characteristics, as well as the forward and adverse models of both braking pressure and acceleration are obtained. Then, with two typical roads including single homogeneous road and fragment pavement, the safe distance of improved AEB is modeled. To validate the algorithm developed in this paper, various tests have been conducted. According to the test results, the reflectivity of laser point cloud is effective in estimating the road adhesion coefficient. Moreover, considering the performance of EHB system, the improved AEB algorithm is deemed more consistent with the practicalities.

Evolutions in Railway Signaling: A “New Age” of Control?

2009 ◽  
Author(s):  
Cameron Fraser
Keyword(s):  
New Age ◽  
Safe Distance ◽  
Signaling Systems ◽  
Train Control ◽  
Train Routing

The development of railroad signaling systems evolved with the need to provide interlocking between points and signals, and block working to keep trains a safe distance apart. Accordingly, the archetypal behavior of train control is summed up as providing (1) safe and efficient train movement by (2) the management of train routing and separation. This has been rudimentary since the advent of railway signaling and propagated in even the most contemporary of technologies today.

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