Electromechanical closed-loop with high-Q capacitive micro-accelerometers and pulse width modulation force feedback

2011 ◽  
Author(s):  
Zhen-hua Ye ◽  
Hai-gang Yang ◽  
Fei Liu ◽  
Tao Yin ◽  
Qi-song Wu
Keyword(s):  
Pulse Width ◽  
Closed Loop ◽  
Pulse Width Modulation ◽  
Force Feedback ◽  
High Q

A closed-loop interface for capacitive micro-accelerometers with pulse-width-modulation force feedback

2017 ◽  
Vol 94 (2) ◽  
pp. 195-204 ◽  
Author(s):  
Tao Yin ◽  
Zhenhua Ye ◽  
Guocheng Huang ◽  
Huanming Wu ◽  
Haigang Yang
Keyword(s):  
Pulse Width ◽  
Closed Loop ◽  
Pulse Width Modulation ◽  
Force Feedback

scholarly journals Analysis of Sinusoidal Pulse Width Modulation Parameter Settings in High Precission Closed Loop Full Bridge Bipolar Inverters for High Voltage High Frequency Generator

Teknik ◽  
2020 ◽  
Vol 41 (1) ◽  
pp. 55-61
Author(s):  
Abdul Syakur ◽  
Arifin Wibisono
Keyword(s):  
High Voltage ◽  
High Frequency ◽  
Pulse Width ◽  
Large Scale ◽  
Closed Loop ◽  
Pulse Width Modulation ◽  
Waste Treatment ◽  
Electrical Energy ◽  
Loop Control ◽  
Sinusoidal Pulse Width Modulation

The application of high voltage becomes more important and wider. High voltage is needed in the process of reducing air contaminants, waste treatment, sanitation, disinfecting microorganisms, testing for insulating high voltage equipment, and transmitting electrical energy. The problem of high voltage AC generation system is still in a large scale, static, not portable, and very expensive. This paper presents an analytical design of a high-voltage AC high-frequency based on power electronic. It is portable, less expensive, and eaasier to control the amplitudo and frequency. The application of the Full Bridge Bipolar Inverter topology with the Sinusoidal Pulse Width Modulation switching method provides variable sinusoidal AC voltage outputs (Vo) on its amplitude and frequency. The Tesla Coil Transformer amplifies the amplitude in accordance with the classification of the high voltage AC in the order of Kilo Volt. The Closed Loop control system in the Bipolar Inverter Full Bridge topology provides high accuracy results between the given setting values and the actual amplitude output and the expected high-frequency AC voltage. Analysis of the SPWM switching pattern parameter settings shows stability for several loading variations

Development of Pneumatic Parallel Force Feedback

2010 ◽  
Vol 4 (4) ◽  
pp. 380-387 ◽  
Author(s):  
Yasunobu Hitaka ◽  
◽  
Yoshito Tanaka ◽  
Yutaka Tanaka ◽  
Junko Ishii ◽  
...  
Keyword(s):  
Pulse Width ◽  
Parallel Mechanism ◽  
Pulse Width Modulation ◽  
Force Feedback ◽  
Physical Therapist ◽  
Feedback System ◽  
Pneumatic Cylinder ◽  
Air Compression ◽  
Pneumatic Cylinders ◽  
Pushing And Pulling

The increasing number of paralyzed persons and a shortage of the physical therapist is becoming an increasing problem, focusing attention on rehabilitation support. Noting the increase in wrist paralysis, we are developing corresponding rehabilitation support. Our basic approach centers on force feedback system based on the parallel 6-degree-of-freedom (DOF) Stewart platform. This parallel mechanism consists of six pneumatic cylinders whose thrust is controlled by pulse width modulation (PWM). Each cylinder has two solenoid valves for pushing and pulling controlled by PWM signals from a programmable interface controller (PIC). The influence of pneumatic cylinder control on air compression must be considered, so we guaranteed accumulator effects on control characteristics. We confirmed that cylinder thrust is applicable to the pneumatic parallel mechanism, and experimental force control results are presented.

Analysis and design of a PWM chopper-on/off control via a second order filter

2014 ◽  
Vol 11 (2) ◽  
pp. 181-186 ◽  
Author(s):  
Abdelouahab Zaatri ◽  
Souad Belhour
Keyword(s):  
Pulse Width ◽  
Closed Loop ◽  
Pulse Width Modulation ◽  
Theoretical Study ◽  
Second Order ◽  
Power Supplies ◽  
Analysis And Design ◽  
System Parameters ◽  
Order Filter ◽  
The Relationship

This paper presents the analysis of a nonlinear on/off control system including a filter of a second order in the closed loop. The proposed system is capable of generating a pulse width modulation which is used to design and built up a PWM (Pulse Width Modulation) chopper dedicated to regulate fluctuating power supplies such as photovoltaic, wind turbine systems; etc. The use of the second order filter aims to compensate the output against the fluctuations of irradiation as well as the variation of the load. The study essentially focuses on determining the relationship between the pulse durations with respect to system parameters and technological requirements. The theoretical study is followed by a simulation of a DC-DC chopper.

scholarly journals Analytically Modeling, Design and Analysis a Nonlinear Controller for a STATCOM operations

2018 ◽  
Vol 7 (4) ◽  
pp. 221
Author(s):  
J. K. Moharana
Keyword(s):  
Pulse Width ◽  
Closed Loop ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Closed Loop Control ◽  
Nonlinear Controller ◽  
Performance Indices ◽  
Static Synchronous Compensator ◽  
Loop Control ◽  
Relevant Variables

The concept of H Control is extended, in principle, to the SVPWM (Space Vector Pulse Width Modulation) based inverter switching of a STATCOM (STATic synchronous COMpensator) device. The SVPWM assures a greater value of modulation factor in the undermodulation as well as the overmodulation range compared to SPWM (Sine Pulse Width Modulation) i.e. a much higher fundamental content. In the present work, the STATCOM has been modeled and its model is nonlinear in  (phase angle between fundamental of system voltage and output voltage of STATCOM. The effect of increased modulation index and lower harmonic distortion has been studied through simulation w.r.t. different performance indices and dynamic response of relevant variables. A PI and an H Controller have been designed for closed-loop control of the system. It is found through simulation that H controller gives better response than PI controller for nonlinear system.

The 1-Bit Instrument

2020 ◽  
Vol 1 (1) ◽  
pp. 44-74
Author(s):  
Blake Troise
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Interleaving Techniques ◽  
Sonic Environment

The 1-bit sonic environment (perhaps most famously musically employed on the ZX Spectrum) is defined by extreme limitation. Yet, belying these restrictions, there is a surprisingly expressive instrumental versatility. This article explores the theory behind the primary, idiosyncratically 1-bit techniques available to the composer-programmer, those that are essential when designing “instruments” in 1-bit environments. These techniques include pulse width modulation for timbral manipulation and means of generating virtual polyphony in software, such as the pin pulse and pulse interleaving techniques. These methodologies are considered in respect to their compositional implications and instrumental applications.

Sign in / Sign up

Export Citation Format

Share Document