Application of Engine Load Estimation Method Using Crank Angular Velocity Variation to Spark Advance Control

2014 ◽  
Vol 8 (1) ◽  
pp. 165-174 ◽  
Author(s):  
Ryosuke Ibata ◽  
Hirotaka Kawatsu ◽  
Tetsuya Kaneko ◽  
Kenji Nishida
Keyword(s):  
Angular Velocity ◽  
Estimation Method ◽  
Velocity Variation ◽  
Load Estimation ◽  
Engine Load ◽  
Spark Advance Control

scholarly journals An Ultrahigh-Sensitivity Graphene Resonant Gyroscope

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1890
Author(s):  
Yang Lu ◽  
Zhan-She Guo ◽  
Shang-Chun Fan
Keyword(s):  
Angular Velocity ◽  
High Sensitivity ◽  
Velocity Variation ◽  
Beam Length ◽  
Sensing Element ◽  
Finite Element Software ◽  
Resonant Beam ◽  
Frequency Output ◽  
Length Width ◽  
Ultrahigh Sensitivity

In this study, a graphene beam was selected as a sensing element and used to form a graphene resonant gyroscope structure with direct frequency output and ultrahigh sensitivity. The structure of the graphene resonator gyroscope was simulated using the ANSYS finite element software, and the influence of the length, width, and thickness of the graphene resonant beam on the angular velocity sensitivity was studied. The simulation results show that the resonant frequency of the graphene resonant beam decreased with increasing the beam length and thickness, while the width had a negligible effect. The fundamental frequency of the designed graphene resonator gyroscope was more than 20 MHz, and the sensitivity of the angular velocity was able to reach 22,990 Hz/°/h. This work is of great significance for applications in environments that require high sensitivity to extremely weak angular velocity variation.

Proposal of load estimation method using plastic strain under fatigue fracture surface

2019 ◽  
Vol 2019 (0) ◽  
pp. OS0332
Author(s):  
Taketo KAIDA ◽  
Motomichi KOYAMA ◽  
Shigeru HAMADA ◽  
Eisaku SAKURADA ◽  
Tatsuo YOKOI ◽  
...  
Keyword(s):  
Fracture Surface ◽  
Plastic Strain ◽  
Fatigue Fracture ◽  
Estimation Method ◽  
Load Estimation ◽  
Fatigue Fracture Surface

A Hand Load Estimation Method for Anteflextion by Using The Muscle Hardness Sensor

2016 ◽  
Vol 2016 (0) ◽  
pp. 1P1-12b2
Author(s):  
Yoshio TSUCHIYA ◽  
Takashi KUSAKA ◽  
Takayuki TANAKA ◽  
Yoshikazu MATSUO
Keyword(s):  
Estimation Method ◽  
Load Estimation ◽  
Muscle Hardness

scholarly journals Wireless Battery Charging Circuit Using Load Estimation Without Wireless Communication

Energies ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 4489
Author(s):  
Lee ◽  
Choi ◽  
Kim ◽  
Kang
Keyword(s):  
Wireless Communication ◽  
Estimation Method ◽  
Load Resistance ◽  
Battery Pack ◽  
Constant Current ◽  
Estimation Methods ◽  
Load Estimation ◽  
Output Current ◽  
Battery Charging ◽  
Transmitter Coil

A wireless battery charging circuit is proposed, along with a new load estimation method. The proposed estimation method can predict the load resistance, mutual inductance, output voltage, and output current without any wireless communication between the transmitter and receiver sides. Unlike other estimation methods that sense the high-frequency AC voltage and current of the transmitter coil, the proposed method only requires the DC output value of the peak current detection circuit at the transmitter coil. The proposed wireless power transfer (WPT) circuit uses the estimated parameters, and accurately controls the output current and voltage by adjusting the switching phase difference of the transmitter side. The WPT prototype circuit using a new load estimation method was tested under various coil alignment and load conditions. Finally, the circuit was operated in a constant current and constant voltage modes to charge a 48-V battery pack. These results show that the proposed WPT circuit that uses the new load estimation method is well suited for charging a battery pack.

Amplitude Control for Linear Resonance Actuator Using Sensorless Load Estimation Method

2020 ◽  
Vol 140 (7) ◽  
pp. 534-541
Author(s):  
Tomoaki Mototsuji ◽  
Masayuki Kato ◽  
Akira Heya ◽  
Katsuhiro Hirata
Keyword(s):  
Estimation Method ◽  
Load Estimation ◽  
Amplitude Control ◽  
Linear Resonance
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