STUDENT ACTIVITIES
Last updated: April 20, 2025

Unlike typical universities, it is difficult for our laboratory to carry out space projects with students alone. However, as part of our research, students from our laboratory are currently participating in the following activities together with students from other universities and working professionals.


Wireless Power Transmission Experiment
Last updated: April 20, 2025

Doctoral students are developing a membrane-based rectenna supported by a self-expanding truss as part of their PhD research. This rectenna is a small equilateral triangle with a side length of 1 m, but it fits into a 1U size and weighs less than 600 g, making it lightweight and suitable for wireless power transmission experiments between spacecraft in orbit.

In addition, during the course of this development, we have conducted research on elements essential for the practical application of gossamer structures in the future, such as a speed control mechanism for self-expanding booms (rotary dampers), ultra-compact latch mechanisms, and methods for maintaining membrane structures using kinematic couplings. We look forward to seeing these technologies demonstrated in orbit.

WPT


Micro Solar Power Sail
Last updated: April 20, 2025

As part of research on ultra-lightweight membrane structure system, we are collaborating with Institute of Science Tokyo and cosmobloom to develop the micro solar sail PIERIS. Student members have been working on the production of concept models and analysis of the sail structure.

Student members will continue to participate in PIERIS's joint development efforts while conducting research on the enlargement and high-precision of sail membrane structures.

PIERIS


Starshade (currently suspended)
Last updated: April 1, 2021

Our student team has been working on the conceptual design of “Euryops,” a mission to demonstrate star-shading technology using two ultra-small satellites orbiting in low Earth orbit.

As we proceeded with our investigation, we recognized that in order to realize a large occulta with high shape accuracy, it is necessary to further study methods for improving the accuracy of the gossamer structure. Therefore, we are currently conducting research on improving the accuracy of the gossamer structure.

Starshade

Euryops desgin
References
Takeru Nakamura, Yasuyuki Miyazaki, Proposal of Starshade Technology Demonstration Mission "Euryops" using Micro Satellite, ASJ Autumn Annlual Meeting, Z130b, 11-13 September 2024, Kobe.
Takeru Nakamura, Yasuyuki Miyazaki, Mission Study of Starshade Technology Demonstration Satellite, COSPAR 2021, E1.20-0008-21, 28 January - 4 February 2021.
Shoichi Shitara, Seita Kataoka, Ayaka Kawashita, and Yasuyuki Miyazaki, Concept Design of Occulter Using Modular Self-Deployable Membrane Truss, AIAA Scitech 2020 Forum, AIAA 2020-1182, pp.1-12, 6-10 January 2020, Orlando, Florida, USA, DOI: 10.2514/6.2020-1182.
 

APPENDIX

Our laboratory has three pillers:

The first one is "create beautiful things". As for the development of nano-satellites, for example, we must make "beautiful" satellite. The theory, experiment, and numerical analysis code must be "beautiful". The most important is that we must ask ourselves "what is beautiful?" in each case. Off course it does not mean visible beauty. When we, researchers, feel it "beautiful", it involves something important, something valuable. We think it is necessary to have such a point of view in our research and development.

The second one is "investigate by oneself, think by oneself, decide by oneself, and challenge by oneself". We think the human society requires young people who take action by theirselves to accomplish something, and can obtain some valuable results. There are lots of social activities/events that try to create something by gathering the power of many participants. There are many people who organize such events. We think, however, they do not always act and create something by theirselves. The expect the ability of the participants, not themselves. In such cases, the things proceed very slowly, and finally, they finally need someone who takes action and creates something. There, "challenge" is most important. It is not sufficient to find someone who just do something, because it is meaningless and there occurs no revolution if he does very easy try to avoid the failure. We think our society will make revolution and get to higher level if we challenge for something that people think "thats's impossible", "that's wonderful if it is realized, but it cannot be realized". We hope the one who make such a challeng is evaluated and recognized as very important person in our society.

The third one is "do the best for success". You will think that's obvious. But on the other hand, people says "Don't be anxious about the result, don't afiraid of the falure in young age", "Experience lots of failue and learn from the failure".

The wisdoms "Learn from failure" and "Don't be afraid of failure" are definitely correct, and many people give the background and the meaning of these phrases. But the people who say "don't be afraid of failure" are often successful people, and we think this phrase is something like a magic spell that only successful person can make.

Our laboratory always keeps in mind that "challenge and success is most important", we must care enough for a result, and we must aim for success. If we tried to care enough for a result and did our best to attain it, we can learn exactly what was not enough when we got failure by our lack of ability, and then we can turn our failure into success.

In other words, only people who did thier best to get success can "learn from failure", and for this reason, "aiming for success" is important. If someone did not do his/her best, we think he/she may learn little or learn just only what everyone knows. In this sense, it is not easy to learn form failure and there are probably not so many people who can learn from failure.

It is obvious in the first place that we cannot necessarilly learn from failure in true sense, because we cannot prove that we have learnt from failure until we wil make sccuess.

It is not easy for many students to become a person needed by the world and to play an important role in the world. They need enough time to be ready for it. In this sense, a university laboratory is "the last defence" for students before they go out into the world (workplace), and one of its role is to make the students prepare enough to play a role in the world. In addition, it is one of joy for university laboratory that students and faculties realize together something people want to do. Thus Providing various opportunities to the studetns is the role of the laboratory. We hope the students in the laboratory take the opportunities, gain their experience, and improve theirselves. They (their parents) pay tuition (not cheap!), so that they should get enough return.

Keeping these in mind, our laboratory has the following activity policy:

  1. We create what is accepted in the world. (It must not be "a research just for research papers". It must not be only our own satisfaction. It must not be without vision for the future).
  2. We find the problem by ourselves and consider the way to solve it. We formulate the theory to solve it, and validate it by e.g. numerical simulation, and verify it by experiments.
  3. We accuire the skills to keep scientific investigation into the essence of the matter and to sense "what is important".
  4. We always utilize our every experience to the next oportunity, i.e. we never waste experience even if it seems trivial one.

We would like people to know about the joy of our activities. We will often provide the information about our activities, so we will be happy if you check this website.