ModelBased Estimation of Cylinder Pressure Sensor Offset using LeastSquares Methods
(2001) 4. p.37403745 Abstract
 Two methods for estimating the sensor offset of a cylinder pressure transducer are developed. Both methods fit the pressure data during precombustion compression to a polytropic curve. The first method assumes a known polytropic exponent, and the other estimates the polytropic exponent. The first method results in a linear leastsquares problem, and the second method results in a nonlinear leastsquares problem. The nonlinear leastsquares problem is solved by separating out the nonlinear dependence and solving the singlevariable minimization problem. For this, a finite difference Newton method is applied. Using this method, the cost of solving the nonlinear leastsquares problem is only slightly higher than solving the linear... (More)
 Two methods for estimating the sensor offset of a cylinder pressure transducer are developed. Both methods fit the pressure data during precombustion compression to a polytropic curve. The first method assumes a known polytropic exponent, and the other estimates the polytropic exponent. The first method results in a linear leastsquares problem, and the second method results in a nonlinear leastsquares problem. The nonlinear leastsquares problem is solved by separating out the nonlinear dependence and solving the singlevariable minimization problem. For this, a finite difference Newton method is applied. Using this method, the cost of solving the nonlinear leastsquares problem is only slightly higher than solving the linear leastsquares problem. Both methods show good statistical behavior. Estimation error variances are inversely proportional to the number of pressure samples used for the estimation. The method is computationally inexpensive, and well suited for realtime control applications (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/537902
 author
 Tunestål, Per ^{LU} ; Hedrick, J. K. and Johansson, Rolf ^{LU}
 organization
 publishing date
 2001
 type
 Chapter in Book/Report/Conference proceeding
 publication status
 published
 subject
 keywords
 pressure transducers, parameter estimation pressure sensors, least squares approximations, internal combustion engines, Newton method, finite difference methods
 host publication
 Proceedings of the 40th IEEE Conference on Decision and Control, 2001.
 volume
 4
 pages
 3740  3745
 publisher
 IEEE  Institute of Electrical and Electronics Engineers Inc.
 external identifiers

 scopus:0035709703
 ISBN
 0780370619
 DOI
 10.1109/.2001.980445
 project
 Competence Centre for Combustion Processes
 language
 English
 LU publication?
 yes
 id
 da1594105d0448068c19668a9075ebf8 (old id 537902)
 date added to LUP
 20160404 09:58:13
 date last changed
 20200112 21:07:18
@inproceedings{da1594105d0448068c19668a9075ebf8, abstract = {Two methods for estimating the sensor offset of a cylinder pressure transducer are developed. Both methods fit the pressure data during precombustion compression to a polytropic curve. The first method assumes a known polytropic exponent, and the other estimates the polytropic exponent. The first method results in a linear leastsquares problem, and the second method results in a nonlinear leastsquares problem. The nonlinear leastsquares problem is solved by separating out the nonlinear dependence and solving the singlevariable minimization problem. For this, a finite difference Newton method is applied. Using this method, the cost of solving the nonlinear leastsquares problem is only slightly higher than solving the linear leastsquares problem. Both methods show good statistical behavior. Estimation error variances are inversely proportional to the number of pressure samples used for the estimation. The method is computationally inexpensive, and well suited for realtime control applications}, author = {Tunestål, Per and Hedrick, J. K. and Johansson, Rolf}, booktitle = {Proceedings of the 40th IEEE Conference on Decision and Control, 2001.}, isbn = {0780370619}, language = {eng}, pages = {37403745}, publisher = {IEEE  Institute of Electrical and Electronics Engineers Inc.}, title = {ModelBased Estimation of Cylinder Pressure Sensor Offset using LeastSquares Methods}, url = {https://lup.lub.lu.se/search/ws/files/5429316/625721.pdf}, doi = {10.1109/.2001.980445}, volume = {4}, year = {2001}, }