A process control strategy based upon device performance metrics

2002 ◽  
Author(s):  
S. Ruegsegger ◽  
B. Conchieri
Keyword(s):  
Process Control ◽  
Control Strategy ◽  
Performance Metrics ◽  
Device Performance

Process control strategy for ITER central solenoid operation

Cryogenics ◽  
2016 ◽  
Vol 80 ◽  
pp. 284-293 ◽  
Author(s):  
R. Maekawa ◽  
S. Takami ◽  
A. Iwamoto ◽  
H.-S. Chang ◽  
A. Forgeas ◽  
...  
Keyword(s):  
Process Control ◽  
Control Strategy

A creep control for distributed rear wheel drive bus

2020 ◽  
Vol 234 (14) ◽  
pp. 3302-3315
Author(s):  
Yuan Wang ◽  
Liangxin Yuan ◽  
Hao Chen ◽  
Peng Du ◽  
Xiaomin Lian
Keyword(s):  
Control Strategy ◽  
Evaluation Method ◽  
Performance Metrics ◽  
Subjective Evaluation ◽  
Rear Wheel ◽  
Vehicle Speed ◽  
Control Parameters ◽  
Loop Control ◽  
Driving Experience ◽  
Start Up

Creep control is a kind of start-up control for electric vehicle. In the paper, two closed-loop control is contained in the creep control strategy. Proportional control with torque limitation, which adjusts vehicle speed, is the outer-loop control; and anti-slip control is the inner-loop control. In this way, the vehicle speed indicates no overshoot and has uniform convergence with driving torque. Moreover, the vehicle can start up on low adhesion or split road, and the driver can control the creep speed by the brake pedal only, so that the driver’s operation is reduced. Subjective evaluation method is proposed to determine the control performance metrics, and then the mathematical relationship between the performance metrics and the control parameters is established. The tuning method of the control parameters is proposed according to those performance metrics, which mitigates the workloads of calibration and provides a better driving experience. Some simulations and real vehicle experiments are conducted to verify that the control strategy has an expected performance.

scholarly journals Development of a fluid bed granulation process control strategy based on real-time process and product measurements

Talanta ◽  
2012 ◽  
Vol 100 ◽  
pp. 293-302 ◽  
Author(s):  
Anneleen Burggraeve ◽  
Ana F.T. Silva ◽  
Tom Van Den Kerkhof ◽  
Mario Hellings ◽  
Chris Vervaet ◽  
...  
Keyword(s):  
Process Control ◽  
Real Time ◽  
Control Strategy ◽  
Time Process ◽  
Granulation Process ◽  
Fluid Bed ◽  
Fluid Bed Granulation

scholarly journals Closed-loop control of ankle plantarflexors and dorsiflexors using an inverted pendulum apparatus: A pilot study

2013 ◽  
Vol 21 (1) ◽  
pp. 31-36 ◽  
Author(s):  
Michael Same ◽  
Hossein Rouhani ◽  
Kei Masani ◽  
Milos Popovic
Keyword(s):  
Control Strategy ◽  
Pid Control ◽  
Closed Loop ◽  
Inverted Pendulum ◽  
Performance Metrics ◽  
Settling Time ◽  
Voluntary Control ◽  
Lower Limbs ◽  
Quiet Stance ◽  
Cord Injury

Considerable demand exists for a device to facilitate hands-free, stable stance in individuals with neurological disorders such as spinal cord injury (SCI) and stroke. In this regard, applying functional electrical stimulation (FES) to muscles of the lower limbs in closed loop has shown promise. In particular, it has been suggested that a PID control strategy could offer functional benefits to stability by mimicking the neurological control strategy employed in able-bodied stance. In this proof of concept study, we tested this assertion by examining the potential of a PID control strategy with gravity compensation to effectively maintain balance during quiet stance by regulating FES-induced contractions of the ankle plantarflexors and dorsiflexors in able-bodied individuals. A novel Inverted Pendulum Standing Apparatus (IPSA) was employed to simulate quiet stance whilst minimizing the voluntary control of able-bodied subjects. Quiet and perturbed standing trials were performed in 3 able-bodied subjects. Performance metrics including those pertaining to stability during quiet stance (root mean square difference), perturbation rejection capabilities (settling time, peak deviation), and ability to transition from an offset initial position (settling time), were examined. For all 3 subjects and for all of the metrics examined, our results showed that the proposed closed-loop controlled FES system improved performance in comparison to voluntary control. These results indicate that the PID plus gravity control strategy used in this study offers meaningful benefits over voluntary control in terms of standing stability. Thus, the controller could potentially be applied to the problem of improving or restoring standing ability in some neurologic patient populations.

Toward the Development of Knee Prostheses: Review of Current Active Devices

2019 ◽  
Vol 71 (3) ◽  
Author(s):  
Rafael R. Torrealba ◽  
Edgar D. Fonseca-Rojas
Keyword(s):  
Clinical Assessment ◽  
Control Strategy ◽  
Selection Criteria ◽  
Performance Metrics ◽  
Mechanical Design ◽  
Knee Prostheses ◽  
Active Devices ◽  
Scientific Papers ◽  
Transfemoral Amputees ◽  
And Control

This paper presents a thorough review of the initiatives carried out in the last 10 years toward the development of active knee prostheses (AKP) for transfemoral amputees. Three selection criteria were employed to filter the works to be considered in the review: (1) a prototype of the prosthesis is available; (2) the mechanical design, instrumentation, and control strategy of such a prototype have been presented in a scientific disclosure media; and (3) the prototype has been subjected to clinical assessment at least in a preliminary way. After applying such criteria, 16 projects were selected and further reviewed through a total of 31 scientific papers, considering the following six aspects: (1) actuators, (2) instrumentation, (3) control, (4) testing trials, (5) performance metrics, and (6) limitations. Then, in addition, the chronological appearance of the aforesaid papers is also shown and quantified regarding each of the previously mentioned issues, to initiate discussion on the related topics. Thus, the present review results in a specialized summary of all these developments in a structured format, offering additional understanding of the recent advances achieved in this field.

An Approach to Automated Deburring by Robot Manipulators

1986 ◽  
Vol 108 (4) ◽  
pp. 354-359 ◽  
Author(s):  
H. Kazerooni ◽  
J. J. Bausch ◽  
B. M. Kramer
Keyword(s):  
Process Control ◽  
Control Problem ◽  
Frequency Domain ◽  
Control Strategy ◽  
Closed Loop ◽  
Robot Manipulators ◽  
Industrial Robot ◽  
Automated System ◽  
Working Together ◽  
Tangential Forces

The deburring process of manufactured parts has been investigated theoretically and experimentally as a frequency domain control problem with special regard to application by industrial robot manipulators. A new control strategy has been developed for precision deburring to guarantee burr removal while compensating for robot oscillations and small uncertainties in the location of the part relative to the robot. Compliant tool-holders, designed according to the above control strategy, provide the required normal and tangential forces for deburring. A servo positioning table used to holds parts, has been considered in this study to compensate for robot oscillations up to 80 percent. The robot, the compliant tool-holder, and the servo positioning table, working together with a closed-loop process control, form a new automated system that deburrs manufactured parts.

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