Boots – shoes – and leggings
Patent
1992-06-15
1996-04-02
Ramirez, Ellis B.
Boots, shoes, and leggings
364510, 364151, B01F 500
Patent
active
055046924
ABSTRACT:
The present invention is a system and method for improved processing of flow data signals to provide output flow data signals which better approximate the true flows being measured. The general approach on which the invention is based is commonly known as flow data reconciliation. A dynamic simulation is run in parallel with a flow data reconciliation, and model predicted flows are used to complete balances wherever sensor measurements are unavailable. Model predicted compositions are also used to allow the computation of stream enthalpies so that enthalpy balances can be used in the reconciliation. The use of model predicted values of changes in inventory allow dynamic material balances to be used, making the reconciliation much more effective for processes with slow dynamic behavior. Weighting factors on sensors, computed based on the current value of the error of the sensor, reduce the impact of sensors with high errors. A multiplicative correction factor distributes corrections more evenly among streams with large and small flows. Statistical behavior of historical performance of sensors is used to reduce the adverse impact of rapid shifts in sensor accuracy and to detect unconverged reconciliation solutions.
REFERENCES:
patent: 3823310 (1974-07-01), Kalotay et al.
patent: 4552534 (1985-06-01), Wakamori et al.
patent: 4720800 (1988-01-01), Suzuki et al.
patent: 4813270 (1989-03-01), Baillie
patent: 4852053 (1989-07-01), Turrie
patent: 4926364 (1990-05-01), Brotherton
patent: 4958684 (1990-09-01), Nguyen et al.
patent: 4965713 (1990-10-01), Hong et al.
V. Novotny et al., "Strategy of Stochastic Real-Time Control of Wastewater Treatment Plants", ISA Transactions, vol. 31, No. 1, 1992, pp. 73-85.
K. Fagervik et al., "Control of Batch Evaporate Crystillization of Sugar by Means of Adaptive Stimulation", Proceedings of the 1988 American Control Conference, vol. 1, Jun. 1988, pp. 677-683.
Ardell et al., "Model Prediction for Reactor Control", CEP, Jun. 1983, pp. 77-83.
Peter Lawrence, "Data Feedback--The Tuning to Keep Your Control System on Song", Process Engineering, Aug. 1984, pp. 35-36.
Peter Lawrence, "More Control from Your Control", C & I, Sep. 1984, pp. 61-67.
Lutcha et al., "Analysis of Measured Plant Data Based on a Steady State Mathematical Model", The Institution of Chemical Engineers, Symposium Series No. 92, Mar./Apr. 1985, pp. 111-120.
Iordache et al., "Performance Studies of the Measurement Test for Detection of Gross Errors in Process Data", AlChE Journal, vol. 31, No. 7, Jul. 1985, pp. 1187-1201.
Tamhane et al., "Data Reconciliation and Gross Error Detection in Chemical Process Networks", Technometrics, vol. 27, No. 4, Nov. 1985, pp. 409-422.
Stephenson et al., "Reconciliation of Process Data with Process Simulation", AlChE Journal, vol. 32, No. 2, Feb. 1986, pp. 247-254.
E. D. Gilles, "Model-Based Techniques for Controlling Processes in Chemical Engineering", Proceedings IFAC 10th World Congress on Automatic Control, vol. II, Section 1.3-2, Jul. 1987, pp. 256-270.
Cameron Crowe, "Observability and Redundancy of Process Data for Steady State Reconciliation", Chemical Engineering Science, vol. 44, No. 12, (Jan.) 1989, pp. 2909-2917.
Bandoni et al., "On Data Reconciliation with Simultaneous Adjustment of Measures and Functional Model Coefficients", Computer Applications in Chemical Engineering, (no month) 1990, pp. 369-374.
Ragot et al., "Detection and Location of Gross Errors in Instruments Using Parity Space Technique", Intl. Journal of Mineral Processing, vol. 31, (no month) 1991, pp. 281-299.
Darouach et al., "Data Reconciliation in Generalized Linear Dynamic Systems", AlChE Journal, vol. 37, No. 2, Feb. 1991, pp. 193-201.
Nair et al., "Rigorous Data Reconciliation is Key to Optimal Operations", Control, Oct. 1991.
E. I. Du Pont de Nemours & Co., (Inc.)
Peeso Thomas
Ramirez Ellis B.
LandOfFree
System and method for improved flow data reconciliation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for improved flow data reconciliation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for improved flow data reconciliation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2021485