Direct training method for a continuous-time nonlinear optimal feedback controller

1995 ◽  
Vol 84 (3) ◽  
pp. 509-528 ◽  
Author(s):  
N. J. Edwards ◽  
C. J. Goh
Bakti Budaya ◽  
2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Pujiharto Pujiharto ◽  
Rakhmat Soleh ◽  
Saeful Anwar

Tamantirto village, Kasihan, Bantul is an area which is positively responsive in terms of dealing with the Covid-19 pandemic. The citizens’ response is not only showed by implementing health protocol and entrances shutdown during the pandemic, but is also empowered by the consciousness of knowledge and experience transfer about pandemic for the next generation. Through the existing village’s information system, they offer a collaboration to lecturer of Indonesian Language and Letter Study Program of FIB UGM in order to conduct feature writing training about citizens’ point of view and experience during the pandemic. The training is held in two methods. The first is direct training method with power point elaborating the definition, type, example, and writing technique and feature editing. The second one is writing guidance using WA group where the participants can send their work to the group chat and then the trainer give feedback for the document. The training produce 21 feature documents which are averagely elaborate the participants’ profession regarding with the pandemic. Most of the documents are written with argumentative paragraph instead of narrating their experience during the pandemic like the common feature which is tend to be narrative. ===== Desa Tamantirto, Kasihan, Bantul merupakan wilayah yang tanggap dalam menghadapi pandemi Covid-19. Ketanggapan warga tidak hanya ditunjukkan melalui penerapan protokal kesehatan dan penutupan sejumlah pintu gang ketika masa pandemi, tetapi juga didukung pada kesadaran akan pentingnya pewarisan pengetahuan dan pengalaman seputar pandemi kepada generasi mendatang. Melalui Tim Sistem Informasi Desa yang mereka miliki, mereka mengajak kerja sama dengan dosen Prodi Bahasa dan Sastra Indonesia FIB UGM untuk mengadakan kegiatan pelatihan penulisan feature seputar pandangan dan pengalaman warga selama pandemi. Pelatihan diselenggarakan dengan dua cara. Pertama, pelatihan secara langsung dengan media power point yang menguraikan definisi, jenis, contoh, dan teknik penulisan serta penyuntingan feature. Kedua, bimbingan penulisan melalui WA Grup ketika peserta mengirimkan karyanya ke grup WA dan narasumber memberikan masukan terhadap naskah tersebut. Pelatihan menghasilkan 21 naskah feature yang rata-rata menguraikan profesi para peserta dan mengaitkannya dengan pandemi. Sebagian besar naskah masih lebih banyak diisi dengan paragrat argumentatif dibandingkan menarasikan pengalaman selama pandemi sebagaimana layaknya feature yang cenderung naratif.


1986 ◽  
Vol 22 (9) ◽  
pp. 921-927
Author(s):  
Sirou TAMAKI ◽  
Morikazu TAKEGAKI ◽  
Hiroyuki EGUTI ◽  
Kouji NAKANO ◽  
Suguru ARIMOTO

2017 ◽  
Vol 89 (2) ◽  
pp. 246-256 ◽  
Author(s):  
Soyinka Olukunle Kolawole ◽  
Duan Haibin

Purpose Keeping satellite position within close tolerances is key for the utilization of satellite formations for space missions. The presence of perturbation forces makes control inevitable if such mission objective is to be realised. Various approaches have been used to obtain feedback controller parameters for satellites in a formation; this paper aims to approach the problem of estimating the optimal feedback parameter for a leader–follower pair of satellites in a small eccentric orbit using nature-based search algorithms. Design/methodology/approach The chaotic artificial bee colony algorithm is a variant of the basic artificial bee colony algorithm. The algorithm mimics the behaviour of bees in their search for food sources. This paper uses the algorithm in optimizing feedback controller parameters for a satellite formation control problem. The problem is formulated to optimize the controller parameters while minimizing a fuel- and state-dependent cost function. The dynamical model of the satellite is based on Gauss variational equations with J2 perturbation. Detailed implementation of the procedure is provided, and experimental results of using the algorithm are also presented to show feasibility of the method. Findings The experimental results indicate the feasibility of this approach, clearly showing the effective control of the transients that arise because of J2 perturbation. Originality/value This paper applied a swarm intelligence approach to the problem of estimating optimal feedback control parameter for a pair of satellites in a formation.


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