Collection of My Mini Assignments in Current Science and Technology in Japan 2016 Course

Fajar Purnama
13 min readJan 16, 2021


As the title suggest, the course is a collection of topics discussed by Professors in Kumamoto University which is compulsory for international students and optional for native Japanese students. Unfortunately I do not have all the materials and do not have the right to share them but I do have the right to share my assignments. Most the assignments are summaries or just my impressions about each sessions and not all of them survived since some are asked to be hand written. Either way, these assignments has never been published anywhere and I, as the author and copyright holder, license this assignment customized CC-BY-SA where anyone can share, copy, republish, and sell on condition to state my name as the author and notify that the original and open version available here.

How Will the Feedback Control Technology be Useful or Beneficial in Your Future?


The feedback control is one of the topics that is discussed in the subject of control system. It can be implemented in all fields but in my case, I mostly heard in field of Engineering usually in Electrical and Mechanical Engineering. The control system itself is the field of controlling a system where a simple control device can control the behaviour of another device, a remote controlled car for example. The remote controlled car is a user or manually controlled device which generally is not feeback controlled that tends to be automatic. A feedback control technology automatically controls the device with the general definition follows after Figure 1.

Figure 1. Feedback Control Block Diagram

Figure 1 above shows the block diagram of feedback control system where the desired output is controlled. The variable “input” itself is usually “desired output”, and “feedback” is the current “output”. The feedback system is a system where the current output is included into the calculation. For example an air conditioner is set an input of 250C, the current temperature is 270C will be the value of the feedback. The system will detect the difference in temperature that the room is still hot. The air condition will attempt to cool it down until it reaches 250C or lower, and once it reaches it the air condition will stop the cool down attempt. It will turn on again when the temperature rises.



Fajar Purnama

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