Disturbance-observer-based active control of engine-induced vibrations in automotive vehicles

Rejection of Harmonic and Transient Disturbances of a Smart Structure With Piezoelectric Actuators

“…It means that to suppress these disturbances, the controller has to be adjusted to the frequency of the disturbance. It could be done by means of the observer-based state-feedback controllers, where disturbance observers are implemented for a plant augmented with a time-varying disturbance model and the observer gain is selected from a group of pre-computed gains (Bohn et al 2003, 2004, Kinney and Callafon 2006. In this approach the stability is not guaranteed.…”

Automotive Applications of Active Vibration Control

“…This method is based on state observer and state feedback and has been proposed in (Bohn et al, 2003), , , (Kowalczyk & Svaricek, 2005). It is assumed that the disturbance enters at the input of the plant S, see Figure 6.…”

“…Various authors have addressed the application of ANC and AVC systems to reduce noise and vibrations in automotive applications (Adachi & Sano, 1996), (Adachi & Sano, 1998), (Ahmadian & Jeric, 1999), (Bao et al, 1991), , (Dehandschutter & Sas, 1998), (Fursdon et al, 2000), (Lecce et al, 1995), (Necati et al, 2000), (Pricken, 2000), (Riley & Bodie, 1996), (Sas & Dehandschutter, 1999), (Shoureshi et al, 1995), , (Shoureshi & Knurek, 1996), (Sano et al, 2002), (Swanson, 1993). ContiTech has implemented prototypes of AVC systems in various test vehicles and demonstrated that significant reductions in noise and vibration levels are achievable , (Karkosch et al, 1999), (Bohn et al, 2000), (Svaricek et al, 2001), (Bohn et al, 2003), , , (Kowalczyk & Svaricek, 2005) (Kowalczyk et al, 2006), (Karkosch & Marienfeld, 2010). Honda has developed a series-production ANC/AVC system to reduce noise and vibration due to cylinder cutoff in combination with the engine RPM as reference signal (Inoue et al, 2004), (Matsuoka et al, 2004).…”

“…Particularly, the noise, vibration and harshness characteristics of cars and trucks are becoming increasingly important (see, e.g., (Buchholz, 2000), (Capitani et al, 2000), (Debeaux et al, 2000), (Haverkamp, 2000), (Käsler, 2000), (Wolf & Portal, 2000), (Sano et al, 2002), (Mackay & Kenchington, 2004), (Elliott, 2008)). Research and development activities at ContiTech and the UniBwM have focused on the transmission of engine-induced vibrations through engine and powertrain mounts into the chassis , (Karkosch et al, 1999), (Bohn et al, 2000), (Svaricek et al, 2001), (Bohn et al, 2003), , , (Kowalczyk & Svaricek, 2005) (Kowalczyk et al, 2006), (Karkosch & Marienfeld, 2010). Engine and powertrain mounts are usually designed according to criteria that incorporate trade-offs between vibration isolation and engine movement since the mounting system in an automotive vehicle has to fulfil the following demands:…”

LPV Gain-Scheduled Observer-Based State Feedback for Active Control of Harmonic Disturbances with Time-Varying Frequencies

“…One consists of a time-invariant plant observer and a time-varying state-feedback gain for the state-augmented plant, where the state augmenation is based on a time-varying error filter, as proposed by Kinney & de Callafon [19]. The other controller approach is based on the disturbance observer of Bohn et al [7], where the plant is augmented with a time-varying disturbance model. A time-varying observer for the overall system and a time-invariant state-feedback gain are used to track and reject the disturbance.…”