LQG based electronic throttle control with a two degree of freedom structure

Abstract

Recently, electronic control of automobiles is becoming popular The electronic throttle valve which we consider in this paper is not an exreption. However, regarding the safety of the automobiles, the system may not always be a linear one. The electronic throttle valve has a nonlinearity caused by two springs provided for safety. This paper proposes one way to solve the problem that is caused by the nonlinearity of the system.

Synthesis and Experimental Validation of the Novel LQ-NEMCSI Adaptive Strategy on an Electronic Throttle Valve

“…Consider now the first integral term (29). The MCS adaptation law is (see (19)) (31) with (32) where the integral and proportional adaptive components are, respectively (33) Thus, by using the above expressions, in (29) can be decomposed as (34) which is greater than a negative definite constant.…”

“…In so doing, unavoidable noise and delays are introduced in the closed-loop system along the velocity channel worsening the overall performances. A way to overcome this problem is to use state observers for the velocity estimation according with some approaches that can be found in the ETB literature (see, for example, [16], [19], [28], [33]). Since one of the most strict industrial requirements is the reduction of the processing time and memory needed for the implementation of controllers on an ECU [15], here we test the control scheme assuming in (4a) equal to zero, removing in this way the need for an online estimation of the angular velocity.…”

Piecewise Linear Control Systems

“…The uncertainty block ∆ is assumed to have induced L 2 -gain less than one and the spring has the nonlinear characteristic shown in Figure 5.4. Nonlinear spring arrangements of similar type can for example be found in engine control systems, see [81]. We set u 0 and consider the system defined by a transfer matrix G(s) with state-space realization The tools derived so far give a large flexibility in how to analyze stability of this system.…”

Control of an Electronic Throttle Valve for Drive-by-Wire Applications

“…Due to its undesirable high order the controller is reduced to a classical PI-structure. A control scheme consisting of two LQG based approaches is presented in [5]. A drive-by-wire throttle control in combination with a sliding-mode concept is studied in [6].…”