The system of a cart inverted pendulum has many problems such as  nonlinearity, complexity, unstable, and underactuated system. It makes this system be a benchmark for testing many control algorithm. This paper  presents a comparison between 2 conventional control methods consist of a linear quadratic regulator (LQR) and pole placement. The comparison  indicated by the most optimal steps and results in the system performance  that obtained from each method for stabilizing a cart inverted pendulum system. A mathematical model of DC motor and mechanical transmission are included in a mathematical model to minimize the realtime implementation problem. From the simulation, the obtained system performance shows that each method has its advantages, and the desired pendulum angle and cart position reached.

Pemasakan nira merupakan salah satu proses yang dilakukan pada pembuatan gula merah. Proses pemasakan nira merupakan salah satu proses penting dalam pembuatan gula merah yang mengakibatkan terjadinya karamelisasi pada gula yang membuat warna gula menjadi coklat. Proses pemasakan nira pada pembuatan gula merah saat ini masih menggunakan pengontrolan secara manual yang akan menyebabkan suhu pemasakan yang tidak stabil. Suhu pemasakan yang tidak stabil akan mengakibatkan gula merah yang dihasilkan menjadi berwarna terlalu pekat dan memiliki rasa manis yang cenderung pahit. Sehingga dalam proses pemasakan nira diperlukan pengontrolan suhu dengan harapan dapat menghasilkan gula merah dengan kualitas warna dan rasa yang semakin baik. Dalam menjaga kestabilan suhu pada proses pemasakan nira, maka dalam penelitian ini digunakan sebuah metode kontrol. Metode kontrol yang digunakan dalam penelitian ini adalah metode kontrol PID yang ditanamkan pada arduino untuk mengontrol aktuator berupa motor servo yang mendapatkan input dari sensor suhu PT100. Dengan menggunakan metode kontrol PID diperoleh parameter kontrol dengan metode Ziegler Nichols dengan nilai Kp = 5, Ki = 0.1 dan Kd = 538. Dari hasil pengujian sistem terhadap aplikasi kontroler PID dengan metode Ziegler Nicholse ini didapatkan nilai (Tr) = 592 s, waktu tunda (Td) = 334 s, waktu turun (Ts) = 957 s, maksimal overshoot (%Mp) = 0% dan error steady state 1.03%. Berdasarkan data respon PID yang dihasilkan menunjukkan bahwa sistem untuk pengukuran suhu sesuai dengan nilai setpoint yang diberikan.

Kebutuhan akan energi fosil semakin lama semakin meningkat danmengakibatkan cadangan energi fosil semakin menipis. Sehinggadibutuhkan energi alternatif yang diharapkan dapat mengurangikonsumsi energi fosil. Sedangkan sumber daya air di Indonesia sangatmelimpah. Oleh karena itu, pembangkit Listrik Pikohidro (PLTPH)merupakan sumber energi listrik alternatif. Umumnya PLTPHmenggunakan kontruksi sipil yang permanen serta bobot yang beratsehingga membutuhkan biaya yang tinggi dan lahan yang luas.Sedangkan tidak semua potensi air dapat digunakan untuk konstruksiPLTPH permanen dan lagi kadangkala dibutuhkan sumber energyalternative yang mudah untuk dipindahkan. Berdasarkan permasalahandi atas di butuhkan PLTPH portable. PLTPH portable terdiri darigenerator, rangkaian boost converter dan mikrokontroler digunakanuntuk melakukan pengisian aki. Agar memperoleh hasil keluaran boostconverter yang stabil maka dilakukan pengontrolan penyulutan boostconverter dengan kontrol PID. Rangkaian boost converter di desainuntuk masukan tegangan 2,5V sampai 4,5V dengan keluaran 7,6V.Digunakan kontrol PID pada boost converter dengan nilai Kp = 1, Ki =0,05, dan Kd = 0,2 menghasilkan respon sistem : rise time (tr) = 0,13,settling time (ts) = 0,22, maksimum over shoot (%OS) = 1,053%, errorsteady state (ess) = 1.

Perkembangan teknologi dan otomatisi industrymendorong manusia untuk memenuhi kebutuhannya dengancepat, khususnya dibidang peternakan. Sebagai contoh ayamras pedginga tau yang disebut juga ayam broiler, yangmerupakan jenis ras unggulan hasil persilangan dari bangsabangsa ayam yang memiliki daya produktivitas yang tinggi,terutama dalam memproduksi daging ayam.Pada umumnyadalam menuju ayam potong siap jual melewati tahapstarter.Tahap starter adalah dimana ayam lahir hingga 15 hari,sedangkan untuk melawati tahap tersebut dibutuhkan suhuyang optimal. Berkisar antara 29 - 35ºC pada umumnya.Sehingga dibuatlah teknologi untuk membantu danmeringankan pekerjaan manusia pada tahap stater, yaitusebuah inkubator.Inkubatorini memiliki kemampuan untukmengatur suhu yang diinginkan secara otomatis, denganmenggunakan coil heater sebagai sumber suhu panas danpemanfaat blower sebagai penyirkulasi udara ruanganinkubator. Sistem ini mengendalikan suhu akibatperpindahan kalor yang disebabkan oleh fan yang berputardengan kecepatan stabil. Secara keseluruhan system inimenggunakan metode fuzzy logic.

Technological advances allow researchers to develop advanced arm robots and can safely work side by side with humans Therefore, a robot arm controller can be designed in such way that the robot arm can move along the desired trajectories and act upon external influences, in this last case, the torque sensor plays an important rule. Currently torque sensors are available in the market has a high price. In this work, an inexpensive robot joint torque sensor is presented. Most parts of this sensor are made using 3D printers. While the other components are easily can be found in the market and with a relatively low-costs. The development of this sensor is intended to facilitate the prototyping of the robot arm for educational and research purposes. The basic idea of the sensor mechanism is to convert torque into a force absorbed by a spring. Then, the encoder senses the direction and the value of the input torque. This torque sensor can be easily too customized. Thus this sensor can be tailored to the needs by replacing some parts such as encoder and spring. The mechanism of this sensor can also be adjusted with the actuator to be paired. Experiments have been conducted to verify the accuracy and the performance of the proposed torque sensor.

Currently, cut chrysanthemum cultivation in a greenhouse is still using a conventional system. Temperature and soil moisture are the most important factors in the growth process. If the temperature and humidity of the soil are not conditioned, the roots will quickly rot and slow the growth process of chrysanthemums. Internet of Things is an integrated system with a data-based server that stores data in the cloud from sensors so that the system can be monitored remotely in real-time. Based on this, an integrated system was designed to make it easier for farmers to condition the temperature and humidity of the chrysanthemum flower soil. In temperature conditioning, if the temperature of cut chrysanthemum is detected <24 ℃ then the heater will be "on" by adjusting the fan rotation and vice versa. Meanwhile, soil moisture conditioning is carried out by distributing water if the detected soil moisture is <50%, then the water pump is in the "on" state. The data on the degree of temperature and the percent of soil moisture will be recorded into the cloud which will then be displayed in the form of graphs and history data on the webserver and Android. By using this system, it is found that the growth process of cut chrysanthemums can grow 7 days faster than the standard harvest time of 30 days.

This paper presents a study of long range (LoRa) communication for monitoring of a ship electrical system. Three categories of electrical system include generator, power distribution, and navigation are monitored. A low power communication technology of LoRa is used to transmit electrical variables such as current, voltage, and power are logged and sent to the server. Experiments using LoRa SX1278 and Arduino have been inducted to validate the performance of the communication. Three spreading factors 12, 7, 6 have been tested. From experiments results, the performance of the communication has been analysed, if has been found that 97% successful data transmission was achieved with maximum distance. Furthermore, small baud rate communication was more suitable for the application.

Malang City which is located at an altitude between 440 - 667 meters above sea level, and surrounded by mountains. Thus, the city of Malang has many springs and rivers with high speed flow. At present, river flow energy that used as hydroelectric power is very least. River flow hydroelectric power schemes are often presumed to be less ecologically damaging than large-scale storage hydroelectric power schemes, and then low priced materials, easy to use and easy to care for. Therefore, researchers have design of Portable Floating Pico-Hydro (PFPH). PFPH using a low speed DC generator (500rpm, 18VDC, 15A), controller, DC-DC converter and battery as a load. Voltage output of PFPH is set to have a constant output of 14 volts DC with PI control algorithm. Specifications of PFPH are turbine diameter is 500mm, turbine width is 500mm, overall length is 1200mm and overall width is 1200mm. PFPH tested at a water speed of 1.5 m/s - 4 m/s and generated power 10W-223W.