Intake valve parameters significantly affect the performance of piston-type expander (PTE). To improve compressed energy utilization efficiency, intake need to be regulated according load. In this paper, an electro-pneumatic variable actuation (EPVVA) system was proposed for independent control distributing parameters. The trajectory planning obtain good mechanical properties. Then, duration an...

The System identification (SI) black box method is used in this study to obtain the mathematical model of a fiber braided bending actuator (FBBA) using MATLAB Simulink. Data from system input and output are by method. Thus, voltage supplied electro-pneumatic regulators position (angle) FBBA collect input–output data study. In system, PRBS generators generate an signal for valve. auto-regressive...

This article proposes a detailed nonlinear mathematical model of an antagonistic pneumatic artificial muscle (PAM) actuator system for estimating the joint angle and torque using unscented Kalman filter (UKF). The proposed is described in hybrid state-space representation. It includes contraction force PAM, dynamics, fluid dynamics compressed air, mass flows valve, friction models. A part model...

The performance of the pneumatic servo systems improved greatly as the pneumatic servo valves became commercially available in the late 1980s. At present, one of the best pneumatic servo valves has a dynamic response of 100 Hz and a spool position accuracy of 2% to the full stroke. By using these pneumatic servo valves, the precise position control by the pneumatic servo system has entered a pr...

Dead-zone in the valve degraded performances of Electro-Pneumatic Actuator (EPA) system. It makes system difficult to control, become unstable and leads chattering effect nearest desired position. In order cater this issue, EPA transfer function dead-zone model is identified by MATLAB SI toolbox Particle Swarm Optimization (PSO) algorithm respectively. Then a parametric control designed based o...

Microfluidic droplet arrays potentially allow to carry out assays involving complex workflows at the single-cell level. In recent developments [e.g. (Jeong et al. in Lab Chip 16:1698, 2016)], each of array can be addressed individually thanks on-chip pneumatic valves. this experimental and theoretical work, we investigate multiple interaction regimes between one or several droplets a valve. par...

Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Timo Manninen Name of the doctoral dissertation Fault Simulator and Detection for a Process Control Valve Publisher School of Engineering Unit Department of Engineering Design and Production Series Aalto University publication series DOCTORAL DISSERTATIONS 146/2012 Field of research Machine technology Manuscript submitted 12 J...

•Based on a paper presented at the Second World Congress, ISPO, New York, 1977. Abstract Following a brief survey of the historic develop­ ment of pneumatic prostheses the actual prin­ ciples of prosthetic management in bilateral shoulder disarticulation or bilateral amelia are explained. The active functions are restricted to active prona t ion and supination, active gripping of the terminal d...

Following a brief survey of the historic development of pneuma­ tic prostheses the actual principles of prosthetic management in bi­ lateral shoulder disarticulation or bilateral amelia are explained. The active functions are re­ stricted to active pronation and supination, active gripping of the terminal device "hook" or "hand", combined with pneumatic locking of free swinging shoulder and elb...

Recently, sophisticated fluidic circuits with hundreds of independent valves have been built by using multi-layer soft-lithography to mold elastomers. However, this shrinking of microfluidic circuits has not been matched by a corresponding miniaturization of the actuation and interfacing elements that control the circuits; while the fluidic circuits are small ( approximately 10-100 micron wide ...