Real-Time Downhole Weight on Bit (DWOB) Automation in Directional Drilling

2015 ◽  
Author(s):  
Andrew Wu ◽  
Geir Hareland
Keyword(s):  
Real Time ◽  
Field Tests ◽  
Directional Drilling ◽  
Well Drilling ◽  
Loop Control ◽  
Closed Loop Control System ◽  
Loop Control System ◽  
Weight On Bit ◽  
The Difference ◽  
Predicted Values

This paper introduces the functionality of a new type of Autodriller software system, which can acquire downhole weight on bit (DWOB) based on surface rig measurement. Field tests are performed, including DWOB measured by downhole measuring tools and the hookload below the top drive using a TTS (Torque and Tension Sub). Three sets of drilling data from three horizontal wells in Western Canada were utilized to verify the models of this new Autodriller system. DWOB comparisons between the model and the measuring tools were carried out. The comparisons indicate a good agreement between the downhole measured DWOB and the new Autodriller predicted values. The difference between the new Autodriller prediction and downhole measured DWOB can be quantified using rooted mean square error (RMSE) or relative error (RE). This paper also analyzes the differences in some sections, and some measures are suggested to potentially reduce these differences. The new Autodriller is a closed loop control system which can automatically in real-time adjust surface weight on bit (SWOB) so that the DWOB is accurate, which will directly improve the performance of drill bits, and decrease the cost of drilling, especially in directional well drilling applications.

Research on Integrated Control and Simulation of Three-Phase Voltage Source PWM Rectifier Based on 64-bit RTW

2015 ◽  
Vol 743 ◽  
pp. 172-175
Author(s):  
S.S. Shi ◽  
Z.W. Zhang ◽  
Liu Shu ◽  
T.Y. Yin ◽  
Y. Li
Keyword(s):  
Real Time ◽  
Integrated Control ◽  
Voltage Source ◽  
Pwm Rectifier ◽  
Phase Voltage ◽  
Loop Control ◽  
Development Cycle ◽  
Closed Loop Control System ◽  
Three Phase ◽  
Loop Control System

This article presents a double closed loop control system for three-phase voltage source<br />PWM rectifier based on a real-time workshop(RTW), introduces the debugging method of 64-bit<br />RTW platform. Then the simulation model is converted into the real-time code, and downloaded to<br />the platform controlled of DSP TMS320F2812 to verify the feasibility. The experimental results<br />agrees the simulation results. This method greatly reduces the project development cycle and cost.

scholarly journals ADAPT: A Smart Mask for Active Defense Against Air-Borne Pathogens

2021 ◽  
Author(s):  
Rohan Reddy Kalavakonda ◽  
Naren Vikram Raj Masna ◽  
Soumyajit Mandal ◽  
Swarup Bhunia
Keyword(s):  
Real Time ◽  
Preventive Measure ◽  
Smartphone Application ◽  
Sensor Data ◽  
Loop Control ◽  
Active Defense ◽  
Closed Loop Control System ◽  
Surgical Masks ◽  
Loop Control System ◽  
Micro Controller Unit

Abstract Face masks are a primary preventive measure against airborne pathogens. Thus, they have become one of the keys to controlling the spread of the COVID-19 virus. Common examples, including N95 masks, surgical masks, and face coverings, are passive devices that minimize the spread of suspended pathogens by inserting an aerosol-filtering barrier between the user’s nasal and oral cavities and the environment. However, the filtering process does not adapt to changing pathogen levels or other environmental factors, which reduces its effectiveness in real-world scenarios. This paper addresses the limitations of passive masks by proposing ADAPT, a smart IoT-enabled “active mask”. This wearable device contains a real-time closed-loop control system that senses airborne particles of different sizes near the mask by using an on-board particulate matter (PM) sensor. It then intelligently mitigates the threat by using mist spray, generated by a piezoelectric actuator, to load nearby aerosol particles such that they rapidly fall to the ground. The system is controlled by an on-board micro-controller unit (MCU) that collects sensor data, analyzes it, and activates the mist generator as necessary. A custom smartphone application enables the user to remotely control the device and also receive real-time alerts related to recharging, refilling, and/or decontamination of the mask before reuse. Experimental results on a working prototype confirm that aerosol clouds rapidly fall to the ground when the mask is activated, thus significantly reducing PM counts near the user. Also, usage of the mask significantly increases local relative humidity (RH) levels.

Analysis on EPS Machitrical Dual Closed-Loop Control System

2012 ◽  
Vol 241-244 ◽  
pp. 1071-1075
Author(s):  
Wan Ying Wei ◽  
Jin Ying Chen ◽  
Gang Xie
Keyword(s):  
Control System ◽  
Fuzzy Control ◽  
Pid Control ◽  
Closed Loop ◽  
Steering System ◽  
Closed Loop Control ◽  
Loop Control ◽  
Closed Loop Control System ◽  
Loop Control System ◽  
The Difference

The electric power steering system (EPS) is a combination of mechanical and electrical control system. EPS’control strategy used commonly has two kinds: current PID control and fuzzy control .The current PID control based on the difference between target current and feedback current is a curren closed-loop control system and the fuzzy control is a mechanical closed-loop control system based on the difference between forces of the upper part and the lower part of the steering shaft . Taking the margin of the mechanical and electrical closed-loop control system, this paper, a torque feedback loop for the outer ring, a current feedback loop as the inner loop, designed a dual-loop control system, the output of the fuzzy control determined a target current, and then proceed to current PID control, fast-track the target torque. The simulation shows the dual closed-loop fuzzy PID control is superior to two commonly used control strategies so that electric power steering system has a better tracking ability and stability.

scholarly journals ML models for real-time hybrid systems

2021 ◽  
pp. 752-759
Author(s):  
Manuel I. Capel
Keyword(s):  
Machine Learning ◽  
Real Time ◽  
Real Time System ◽  
Loop Control ◽  
Ac Motor ◽  
Closed Loop Control System ◽  
Loop Control System ◽  
Flow Through ◽  
Automated Machine Learning ◽  
Time Systems

A correct system design can be systematically obtained from a specification model of a real-time system that integrates hybrid measurements In a realistic industrial environment, this has been carried out through complete Matlab / Simulink / Stateflow models. However, there is a widespread interest in carrying out that modeling resorting to Machine Learning models, which can be understood as Automated Machine Learning for Real-time systems that present some degree of hybridation. An AC motor controller which must be able to maintain a constant air flow through a filter is one of these systems. The article also discusses a practical application of the method for implementing a closed loop control system to show how the proposed procedure can be applied to derive complete hybrid system designs with ANN.

scholarly journals SISTEM KONTROL SUHU PADA PENGERING IKAN BERBASIS MIKROKONTROLER ATMEGA 8535

2020 ◽  
Vol 5 (2) ◽  
pp. 87-95
Author(s):  
Fredy M. Baitanu ◽  
Ali Warsito ◽  
Jonshon Tarigan
Keyword(s):  
Closed Loop ◽  
Dry Mass ◽  
Temperature Data ◽  
Closed Loop Control ◽  
Electronic Market ◽  
Loop Control ◽  
Closed Loop Control System ◽  
Measurement Results ◽  
Loop Control System ◽  
The Difference

Abstrak Telah dirancang sebuah sistem kontrol secara loop tertutup pada unit pengeringan ikan menggunakan sensor LM35, mikrokontroler ATmega8535, seven segment serta beberapa komponen elektronika yang tesedia dipasaran. Sistem dikendalikan oleh mikrokontroler ATmega8535 untuk pengambilan data suhu menggunakan sensor LM35 dan menampilkan data suhu melalui seven segment, serta mengontrol pemanas melalui aktuator. Hasil pengukuran nilai suhu akan dibandingkan dengan nilai setpoint, sehingga diperoleh selisih nilai yang akan digunakan sebagai indikator untuk melakukan proses pengontrolan. Hasil pengujian menunjukkan bahwa pengontrolan bekerja dengan baik dalam merespon setiap perubahan suhu udara. Ketika suhu di bawah setpoint 53°C maka aktuator akan berada dalam kondisi on sehingga pemanas aktif, sebaliknya jika suhu berada di atas setpoint 53°C maka aktuator akan berada dalam kondisi off untuk mematikan heater. Hasil pengeringan selama 4 jam menunjukkan bahwa pengeringan ikan pada massabasah ikan 200 gram, yaitu pada keadaan ventilasi atas kotak pengeringan terbukaakan menghasilkan massa kering90 gram. Pengujian selama 4 jam pada keadaan ventilasi kotak pengeringan tertutup akan menghasilkan massa kering 130 gram. Selain itu, pengeringan secara tradisional selama 12 jam dengan massa basah ikan 200-gram akan menghasilkan massa kering 90 gram.Kata Kunci: Suhu, pengeringan ikan; mikrokontroler Atmega8535; seven segment; aktuator Abstract A closed-loop control system of temperatures in fish drying unit using LM35 sensor, ATmega8535 microcontroller, seven segment and also some of the available electronic market components has been designed. The system is controlled by a microcontroller ATmega8535 for temperature data collection using LM35 sensor and temperature data is displayed on seven segments, as well as heating control via actuators. The measurement results will be compared with the value of the temperature set point value in order to obtain the difference in value to be used as an indicator for process control. The results show that the control works well in response to any changes in air temperature. If the setpoint temperature below 53°C, the actuator will in on condition that the heating is on, otherwise if the temperature is above 53°C setpoint then the actuator will on condition to turn the heater off. Drying for 4 hours results show that the drying fish on the fish wet mass of 200 grams, which is the state of the top vents open drying box will produce a dry mass of 90 grams. Testing for 4 hours in a drying box vents closed state will produce 130 grams of dry mass. In addition, traditional drying for 12 hours with 200 grams of fish wet mass will produce 90 grams of dry mass.Keywords: Temperature; drying fish; ATmega8535 microcontroller; seven segments; actuators.

scholarly journals A smart mask for active defense against airborne pathogens

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Rohan Reddy Kalavakonda ◽  
Naren Vikram Raj Masna ◽  
Soumyajit Mandal ◽  
Swarup Bhunia
Keyword(s):  
Real Time ◽  
Preventive Measure ◽  
Smartphone Application ◽  
Sensor Data ◽  
Loop Control ◽  
Active Defense ◽  
Closed Loop Control System ◽  
Surgical Masks ◽  
Loop Control System ◽  
Micro Controller Unit

AbstractFace masks are a primary preventive measure against airborne pathogens. Thus, they have become one of the keys to controlling the spread of the COVID-19 virus. Common examples, including N95 masks, surgical masks, and face coverings, are passive devices that minimize the spread of suspended pathogens by inserting an aerosol-filtering barrier between the user’s nasal and oral cavities and the environment. However, the filtering process does not adapt to changing pathogen levels or other environmental factors, which reduces its effectiveness in real-world scenarios. This paper addresses the limitations of passive masks by proposing ADAPT, a smart IoT-enabled “active mask”. This wearable device contains a real-time closed-loop control system that senses airborne particles of different sizes near the mask by using an on-board particulate matter (PM) sensor. It then intelligently mitigates the threat by using mist spray, generated by a piezoelectric actuator, to load nearby aerosol particles such that they rapidly fall to the ground. The system is controlled by an on-board micro-controller unit that collects sensor data, analyzes it, and activates the mist generator as necessary. A custom smartphone application enables the user to remotely control the device and also receive real-time alerts related to recharging, refilling, and/or decontamination of the mask before reuse. Experimental results on a working prototype confirm that aerosol clouds rapidly fall to the ground when the mask is activated, thus significantly reducing PM counts near the user. Also, usage of the mask significantly increases local relative humidity levels.

An Expert Controller Based on Transient Response Patterns

2011 ◽  
Vol 219-220 ◽  
pp. 3-7
Author(s):  
Ning Zhang ◽  
Rong Hua Liu
Keyword(s):  
Control System ◽  
Transient Response ◽  
Closed Loop ◽  
Performance Criterion ◽  
Response Patterns ◽  
Loop Control ◽  
Expert Control ◽  
Closed Loop Control System ◽  
Loop Control System ◽  
Control Decision

An expert control system based on transient response patterns and expert system techniques is proposed in this paper. Depending on the features of the closed-loop control system determines the control decision and adjusts the parameters of the controller. The proposed method requires minimal proper information about the controlled plant and, with the linear re-excitation learning method, the system is kept satisfying the performance criterion.

scholarly journals Closed-loop control system for well-defined oxygen supply in micro-physiological systems

2017 ◽  
Vol 3 (2) ◽  
pp. 363-366
Author(s):  
Tobias Steege ◽  
Mathias Busek ◽  
Stefan Grünzner ◽  
Andrés Fabían Lasagni ◽  
Frank Sonntag
Keyword(s):  
Control System ◽  
Oxygen Supply ◽  
Closed Loop ◽  
Microfluidic System ◽  
Closed Loop Control ◽  
Loop Control ◽  
Cell Vitality ◽  
Closed Loop Control System ◽  
Loop Control System

AbstractTo improve cell vitality, sufficient oxygen supply is an important factor. A deficiency in oxygen is called Hypoxia and can influence for example tumor growth or inflammatory processes. Hypoxia assays are usually performed with the help of animal or static human cell culture models. The main disadvantage of these methods is that the results are hardly transferable to the human physiology. Microfluidic 3D cell cultivation systems for perfused hypoxia assays may overcome this issue since they can mimic the in-vivo situation in the human body much better. Such a Hypoxia-on-a-Chip system was recently developed. The chip system consists of several individually laser-structured layers which are bonded using a hot press or chemical treatment. Oxygen sensing spots are integrated into the system which can be monitored continuously with an optical sensor by means of fluorescence lifetime detection.Hereby presented is the developed hard- and software requiered to control the oxygen content within this microfluidic system. This system forms a closed-loop control system which is parameterized and evaluated.

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